Merge branch 'main' into Remove-entity-reserving/pending/flushing-system

.github/workflows/ci.yml

@@ -95,7 +95,7 @@ jobs:
       - name: CI job
         # To run the tests one item at a time for troubleshooting, use
         # cargo --quiet test --lib -- --list | sed 's/: test$//' | MIRIFLAGS="-Zmiri-disable-isolation -Zmiri-disable-weak-memory-emulation" xargs -n1 cargo miri test -p bevy_ecs --lib -- --exact
-        run: cargo miri test -p bevy_ecs
+        run: cargo miri test -p bevy_ecs --features bevy_utils/debug
         env:
           # -Zrandomize-layout makes sure we dont rely on the layout of anything that might change
           RUSTFLAGS: -Zrandomize-layout

Cargo.toml

@@ -165,6 +165,7 @@ default = [
   "vorbis",
   "webgl2",
   "x11",
+  "debug",
 ]
 
 # Recommended defaults for no_std applications
@@ -507,7 +508,10 @@ file_watcher = ["bevy_internal/file_watcher"]
 embedded_watcher = ["bevy_internal/embedded_watcher"]
 
 # Enable stepping-based debugging of Bevy systems
-bevy_debug_stepping = ["bevy_internal/bevy_debug_stepping"]
+bevy_debug_stepping = [
+  "bevy_internal/bevy_debug_stepping",
+  "bevy_internal/debug",
+]
 
 # Enables the meshlet renderer for dense high-poly scenes (experimental)
 meshlet = ["bevy_internal/meshlet"]
@@ -551,6 +555,9 @@ web = ["bevy_internal/web"]
 # Enable hotpatching of Bevy systems
 hotpatching = ["bevy_internal/hotpatching"]
 
+# Enable collecting debug information about systems and components to help with diagnostics
+debug = ["bevy_internal/debug"]
+
 [dependencies]
 bevy_internal = { path = "crates/bevy_internal", version = "0.16.0-dev", default-features = false }
 tracing = { version = "0.1", default-features = false, optional = true }
@@ -2098,6 +2105,7 @@ wasm = false
 name = "dynamic"
 path = "examples/ecs/dynamic.rs"
 doc-scrape-examples = true
+required-features = ["debug"]
 
 [package.metadata.example.dynamic]
 name = "Dynamic ECS"

crates/bevy_anti_aliasing/src/smaa/mod.rs

@@ -847,7 +847,7 @@ impl ViewNode for SmaaNode {
             view_smaa_uniform_offset,
             smaa_textures,
             view_smaa_bind_groups,
-        ): QueryItem<'w, Self::ViewQuery>,
+        ): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let pipeline_cache = world.resource::<PipelineCache>();

crates/bevy_asset/macros/src/lib.rs

@@ -1,6 +1,7 @@
-#![expect(missing_docs, reason = "Not all docs are written yet, see #3492.")]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
+//! Macros for deriving asset traits.
+
 use bevy_macro_utils::BevyManifest;
 use proc_macro::{Span, TokenStream};
 use quote::{format_ident, quote};
@@ -12,6 +13,7 @@ pub(crate) fn bevy_asset_path() -> Path {
 
 const DEPENDENCY_ATTRIBUTE: &str = "dependency";
 
+/// Implement the `Asset` trait.
 #[proc_macro_derive(Asset, attributes(dependency))]
 pub fn derive_asset(input: TokenStream) -> TokenStream {
     let ast = parse_macro_input!(input as DeriveInput);
@@ -30,6 +32,7 @@ pub fn derive_asset(input: TokenStream) -> TokenStream {
     })
 }
 
+/// Implement the `VisitAssetDependencies` trait.
 #[proc_macro_derive(VisitAssetDependencies, attributes(dependency))]
 pub fn derive_asset_dependency_visitor(input: TokenStream) -> TokenStream {
     let ast = parse_macro_input!(input as DeriveInput);

crates/bevy_asset/src/asset_changed.rs

@@ -158,9 +158,9 @@ unsafe impl<A: AsAssetId> WorldQuery for AssetChanged<A> {
         fetch
     }
 
-    unsafe fn init_fetch<'w>(
+    unsafe fn init_fetch<'w, 's>(
         world: UnsafeWorldCell<'w>,
-        state: &Self::State,
+        state: &'s Self::State,
         last_run: Tick,
         this_run: Tick,
     ) -> Self::Fetch<'w> {
@@ -201,9 +201,9 @@ unsafe impl<A: AsAssetId> WorldQuery for AssetChanged<A> {
 
     const IS_DENSE: bool = <&A>::IS_DENSE;
 
-    unsafe fn set_archetype<'w>(
+    unsafe fn set_archetype<'w, 's>(
         fetch: &mut Self::Fetch<'w>,
-        state: &Self::State,
+        state: &'s Self::State,
         archetype: &'w Archetype,
         table: &'w Table,
     ) {
@@ -215,7 +215,11 @@ unsafe impl<A: AsAssetId> WorldQuery for AssetChanged<A> {
         }
     }
 
-    unsafe fn set_table<'w>(fetch: &mut Self::Fetch<'w>, state: &Self::State, table: &'w Table) {
+    unsafe fn set_table<'w, 's>(
+        fetch: &mut Self::Fetch<'w>,
+        state: &Self::State,
+        table: &'w Table,
+    ) {
         if let Some(inner) = &mut fetch.inner {
             // SAFETY: We delegate to the inner `set_table` for `A`
             unsafe {
@@ -265,6 +269,7 @@ unsafe impl<A: AsAssetId> QueryFilter for AssetChanged<A> {
 
     #[inline]
     unsafe fn filter_fetch(
+        state: &Self::State,
         fetch: &mut Self::Fetch<'_>,
         entity: Entity,
         table_row: TableRow,
@@ -272,7 +277,7 @@ unsafe impl<A: AsAssetId> QueryFilter for AssetChanged<A> {
         fetch.inner.as_mut().is_some_and(|inner| {
             // SAFETY: We delegate to the inner `fetch` for `A`
             unsafe {
-                let handle = <&A>::fetch(inner, entity, table_row);
+                let handle = <&A>::fetch(&state.asset_id, inner, entity, table_row);
                 fetch.check.has_changed(handle)
             }
         })

crates/bevy_asset/src/server/mod.rs

@@ -1953,6 +1953,14 @@ impl AssetLoaderError {
     pub fn path(&self) -> &AssetPath<'static> {
         &self.path
     }
+
+    /// The error the loader reported when attempting to load the asset.
+    ///
+    /// If you know the type of the error the asset loader returned, you can use
+    /// [`BevyError::downcast_ref()`] to get it.
+    pub fn error(&self) -> &BevyError {
+        &self.error
+    }
 }
 
 /// An error that occurs while resolving an asset added by `add_async`.

crates/bevy_core_pipeline/src/bloom/mod.rs

@@ -121,7 +121,7 @@ impl ViewNode for BloomNode {
             bloom_settings,
             upsampling_pipeline_ids,
             downsampling_pipeline_ids,
-        ): QueryItem<'w, Self::ViewQuery>,
+        ): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         if bloom_settings.intensity == 0.0 {

crates/bevy_core_pipeline/src/bloom/settings.rs

@@ -227,7 +227,7 @@ impl ExtractComponent for Bloom {
     type QueryFilter = With<Hdr>;
     type Out = (Self, BloomUniforms);
 
-    fn extract_component((bloom, camera): QueryItem<'_, Self::QueryData>) -> Option<Self::Out> {
+    fn extract_component((bloom, camera): QueryItem<'_, '_, Self::QueryData>) -> Option<Self::Out> {
         match (
             camera.physical_viewport_rect(),
             camera.physical_viewport_size(),

crates/bevy_core_pipeline/src/core_2d/main_opaque_pass_2d_node.rs

@@ -31,7 +31,7 @@ impl ViewNode for MainOpaquePass2dNode {
         &self,
         graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        (camera, view, target, depth): QueryItem<'w, Self::ViewQuery>,
+        (camera, view, target, depth): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let (Some(opaque_phases), Some(alpha_mask_phases)) = (

crates/bevy_core_pipeline/src/core_2d/main_transparent_pass_2d_node.rs

@@ -28,7 +28,7 @@ impl ViewNode for MainTransparentPass2dNode {
         &self,
         graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        (camera, view, target, depth): bevy_ecs::query::QueryItem<'w, Self::ViewQuery>,
+        (camera, view, target, depth): bevy_ecs::query::QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let Some(transparent_phases) =

crates/bevy_core_pipeline/src/core_3d/main_opaque_pass_3d_node.rs

@@ -45,7 +45,7 @@ impl ViewNode for MainOpaquePass3dNode {
             skybox_pipeline,
             skybox_bind_group,
             view_uniform_offset,
-        ): QueryItem<'w, Self::ViewQuery>,
+        ): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let (Some(opaque_phases), Some(alpha_mask_phases)) = (

crates/bevy_core_pipeline/src/deferred/node.rs

@@ -36,7 +36,7 @@ impl ViewNode for EarlyDeferredGBufferPrepassNode {
         &self,
         graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        view_query: QueryItem<'w, Self::ViewQuery>,
+        view_query: QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         run_deferred_prepass(
@@ -74,7 +74,7 @@ impl ViewNode for LateDeferredGBufferPrepassNode {
         &self,
         graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        view_query: QueryItem<'w, Self::ViewQuery>,
+        view_query: QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let (_, _, _, _, occlusion_culling, no_indirect_drawing) = view_query;
@@ -107,6 +107,7 @@ fn run_deferred_prepass<'w>(
     render_context: &mut RenderContext<'w>,
     (camera, extracted_view, view_depth_texture, view_prepass_textures, _, _): QueryItem<
         'w,
+        '_,
         <LateDeferredGBufferPrepassNode as ViewNode>::ViewQuery,
     >,
     is_late: bool,

crates/bevy_core_pipeline/src/dof/mod.rs

@@ -352,7 +352,7 @@ impl ViewNode for DepthOfFieldNode {
             view_bind_group_layouts,
             depth_of_field_uniform_index,
             auxiliary_dof_texture,
-        ): QueryItem<'w, Self::ViewQuery>,
+        ): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let pipeline_cache = world.resource::<PipelineCache>();

crates/bevy_core_pipeline/src/msaa_writeback.rs

@@ -61,7 +61,7 @@ impl ViewNode for MsaaWritebackNode {
         &self,
         _graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        (target, blit_pipeline_id, msaa): QueryItem<'w, Self::ViewQuery>,
+        (target, blit_pipeline_id, msaa): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         if *msaa == Msaa::Off {

crates/bevy_core_pipeline/src/post_process/mod.rs

@@ -352,7 +352,7 @@ impl ViewNode for PostProcessingNode {
         &self,
         _: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        (view_target, pipeline_id, chromatic_aberration, post_processing_uniform_buffer_offsets): QueryItem<'w, Self::ViewQuery>,
+        (view_target, pipeline_id, chromatic_aberration, post_processing_uniform_buffer_offsets): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let pipeline_cache = world.resource::<PipelineCache>();
@@ -485,7 +485,7 @@ impl ExtractComponent for ChromaticAberration {
     type Out = ChromaticAberration;
 
     fn extract_component(
-        chromatic_aberration: QueryItem<'_, Self::QueryData>,
+        chromatic_aberration: QueryItem<'_, '_, Self::QueryData>,
     ) -> Option<Self::Out> {
         // Skip the postprocessing phase entirely if the intensity is zero.
         if chromatic_aberration.intensity > 0.0 {

crates/bevy_core_pipeline/src/prepass/node.rs

@@ -36,7 +36,7 @@ impl ViewNode for EarlyPrepassNode {
         &self,
         graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        view_query: QueryItem<'w, Self::ViewQuery>,
+        view_query: QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         run_prepass(graph, render_context, view_query, world, "early prepass")
@@ -73,7 +73,7 @@ impl ViewNode for LatePrepassNode {
         &self,
         graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        query: QueryItem<'w, Self::ViewQuery>,
+        query: QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         // We only need a late prepass if we have occlusion culling and indirect
@@ -112,7 +112,7 @@ fn run_prepass<'w>(
         _,
         _,
         has_deferred,
-    ): QueryItem<'w, <LatePrepassNode as ViewNode>::ViewQuery>,
+    ): QueryItem<'w, '_, <LatePrepassNode as ViewNode>::ViewQuery>,
     world: &'w World,
     label: &'static str,
 ) -> Result<(), NodeRunError> {

crates/bevy_core_pipeline/src/skybox/mod.rs

@@ -113,7 +113,9 @@ impl ExtractComponent for Skybox {
     type QueryFilter = ();
     type Out = (Self, SkyboxUniforms);
 
-    fn extract_component((skybox, exposure): QueryItem<'_, Self::QueryData>) -> Option<Self::Out> {
+    fn extract_component(
+        (skybox, exposure): QueryItem<'_, '_, Self::QueryData>,
+    ) -> Option<Self::Out> {
         let exposure = exposure
             .map(Exposure::exposure)
             .unwrap_or_else(|| Exposure::default().exposure());
@@ -123,7 +125,7 @@ impl ExtractComponent for Skybox {
             SkyboxUniforms {
                 brightness: skybox.brightness * exposure,
                 transform: Transform::from_rotation(skybox.rotation)
-                    .compute_matrix()
+                    .to_matrix()
                     .inverse(),
                 #[cfg(all(feature = "webgl", target_arch = "wasm32", not(feature = "webgpu")))]
                 _wasm_padding_8b: 0,

crates/bevy_core_widgets/src/core_slider.rs

@@ -211,6 +211,7 @@ pub(crate) fn slider_on_pointer_down(
     focus: Option<ResMut<InputFocus>>,
     focus_visible: Option<ResMut<InputFocusVisible>>,
     mut commands: Commands,
+    ui_scale: Res<UiScale>,
 ) {
     if q_thumb.contains(trigger.target()) {
         // Thumb click, stop propagation to prevent track click.
@@ -255,7 +256,7 @@ pub(crate) fn slider_on_pointer_down(
 
         // Detect track click.
         let local_pos = transform.try_inverse().unwrap().transform_point2(
-            trigger.event().pointer_location.position * node_target.scale_factor(),
+            trigger.event().pointer_location.position * node_target.scale_factor() / ui_scale.0,
         );
         let track_width = node.size().x - thumb_size;
         // Avoid division by zero
@@ -394,6 +395,10 @@ fn slider_on_key_input(
             trigger.propagate(false);
             if let Some(on_change) = slider.on_change {
                 commands.run_system_with(on_change, new_value);
+            } else {
+                commands
+                    .entity(trigger.target())
+                    .insert(SliderValue(new_value));
             }
         }
     }
@@ -456,7 +461,7 @@ pub(crate) fn slider_on_insert_step(trigger: On<Insert, SliderStep>, mut world:
 ///     commands.trigger_targets(SetSliderValue::Relative(-0.25), slider);
 /// }
 /// ```
-#[derive(Event, EntityEvent)]
+#[derive(Event, EntityEvent, Clone)]
 pub enum SetSliderValue {
     /// Set the slider value to a specific value.
     Absolute(f32),

crates/bevy_ecs/Cargo.toml

@@ -35,7 +35,7 @@ backtrace = ["std"]
 
 ## Enables `tracing` integration, allowing spans and other metrics to be reported
 ## through that framework.
-trace = ["std", "dep:tracing"]
+trace = ["std", "dep:tracing", "bevy_utils/debug"]
 
 ## Enables a more detailed set of traces which may be noisy if left on by default.
 detailed_trace = ["trace"]
@@ -63,9 +63,9 @@ std = [
   "bevy_reflect?/std",
   "bevy_tasks/std",
   "bevy_utils/parallel",
+  "bevy_utils/std",
   "bitflags/std",
   "concurrent-queue/std",
-  "disqualified/alloc",
   "fixedbitset/std",
   "indexmap/std",
   "serde?/std",
@@ -98,7 +98,6 @@ bevy_platform = { path = "../bevy_platform", version = "0.16.0-dev", default-fea
 ] }
 
 bitflags = { version = "2.3", default-features = false }
-disqualified = { version = "1.0", default-features = false }
 fixedbitset = { version = "0.5", default-features = false }
 serde = { version = "1", default-features = false, features = [
   "alloc",

crates/bevy_ecs/macros/src/query_data.rs

@@ -74,12 +74,23 @@ pub fn derive_query_data_impl(input: TokenStream) -> TokenStream {
     let user_generics = ast.generics.clone();
     let (user_impl_generics, user_ty_generics, user_where_clauses) = user_generics.split_for_impl();
     let user_generics_with_world = {
-        let mut generics = ast.generics;
+        let mut generics = ast.generics.clone();
         generics.params.insert(0, parse_quote!('__w));
         generics
     };
     let (user_impl_generics_with_world, user_ty_generics_with_world, user_where_clauses_with_world) =
         user_generics_with_world.split_for_impl();
+    let user_generics_with_world_and_state = {
+        let mut generics = ast.generics;
+        generics.params.insert(0, parse_quote!('__w));
+        generics.params.insert(0, parse_quote!('__s));
+        generics
+    };
+    let (
+        user_impl_generics_with_world_and_state,
+        user_ty_generics_with_world_and_state,
+        user_where_clauses_with_world_and_state,
+    ) = user_generics_with_world_and_state.split_for_impl();
 
     let struct_name = ast.ident;
     let read_only_struct_name = if attributes.is_mutable {
@@ -164,13 +175,13 @@ pub fn derive_query_data_impl(input: TokenStream) -> TokenStream {
         &visibility,
         &item_struct_name,
         &field_types,
-        &user_impl_generics_with_world,
+        &user_impl_generics_with_world_and_state,
         &field_attrs,
         &field_visibilities,
         &field_idents,
         &user_ty_generics,
-        &user_ty_generics_with_world,
+        &user_ty_generics_with_world_and_state,
-        user_where_clauses_with_world,
+        user_where_clauses_with_world_and_state,
     );
     let mutable_world_query_impl = world_query_impl(
         &path,
@@ -199,13 +210,13 @@ pub fn derive_query_data_impl(input: TokenStream) -> TokenStream {
             &visibility,
             &read_only_item_struct_name,
             &read_only_field_types,
-            &user_impl_generics_with_world,
+            &user_impl_generics_with_world_and_state,
             &field_attrs,
             &field_visibilities,
             &field_idents,
             &user_ty_generics,
-            &user_ty_generics_with_world,
+            &user_ty_generics_with_world_and_state,
-            user_where_clauses_with_world,
+            user_where_clauses_with_world_and_state,
         );
         let readonly_world_query_impl = world_query_impl(
             &path,
@@ -256,11 +267,11 @@ pub fn derive_query_data_impl(input: TokenStream) -> TokenStream {
                 for #read_only_struct_name #user_ty_generics #user_where_clauses {
                     const IS_READ_ONLY: bool = true;
                     type ReadOnly = #read_only_struct_name #user_ty_generics;
-                    type Item<'__w> = #read_only_item_struct_name #user_ty_generics_with_world;
+                    type Item<'__w, '__s> = #read_only_item_struct_name #user_ty_generics_with_world_and_state;
 
-                    fn shrink<'__wlong: '__wshort, '__wshort>(
+                    fn shrink<'__wlong: '__wshort, '__wshort, '__s>(
-                        item: Self::Item<'__wlong>
+                        item: Self::Item<'__wlong, '__s>
-                    ) -> Self::Item<'__wshort> {
+                    ) -> Self::Item<'__wshort, '__s> {
                         #read_only_item_struct_name {
                             #(
                                 #field_idents: <#read_only_field_types>::shrink(item.#field_idents),
@@ -278,13 +289,26 @@ pub fn derive_query_data_impl(input: TokenStream) -> TokenStream {
 
                     /// SAFETY: we call `fetch` for each member that implements `Fetch`.
                     #[inline(always)]
-                    unsafe fn fetch<'__w>(
+                    unsafe fn fetch<'__w, '__s>(
+                        _state: &'__s Self::State,
                         _fetch: &mut <Self as #path::query::WorldQuery>::Fetch<'__w>,
                         _entity: #path::entity::Entity,
                         _table_row: #path::storage::TableRow,
-                    ) -> Self::Item<'__w> {
+                    ) -> Self::Item<'__w, '__s> {
                         Self::Item {
-                            #(#field_idents: <#read_only_field_types>::fetch(&mut _fetch.#named_field_idents, _entity, _table_row),)*
+                            #(#field_idents: <#read_only_field_types>::fetch(&_state.#named_field_idents, &mut _fetch.#named_field_idents, _entity, _table_row),)*
+                        }
+                    }
+                }
+
+                impl #user_impl_generics #path::query::ReleaseStateQueryData
+                for #read_only_struct_name #user_ty_generics #user_where_clauses
+                // Make these HRTBs with an unused lifetime parameter to allow trivial constraints
+                // See https://github.com/rust-lang/rust/issues/48214
+                where #(for<'__a> #field_types: #path::query::QueryData<ReadOnly: #path::query::ReleaseStateQueryData>,)* {
+                    fn release_state<'__w>(_item: Self::Item<'__w, '_>) -> Self::Item<'__w, 'static> {
+                        Self::Item {
+                            #(#field_idents: <#read_only_field_types>::release_state(_item.#field_idents),)*
                         }
                     }
                 }
@@ -301,11 +325,11 @@ pub fn derive_query_data_impl(input: TokenStream) -> TokenStream {
             for #struct_name #user_ty_generics #user_where_clauses {
                 const IS_READ_ONLY: bool = #is_read_only;
                 type ReadOnly = #read_only_struct_name #user_ty_generics;
-                type Item<'__w> = #item_struct_name #user_ty_generics_with_world;
+                type Item<'__w, '__s> = #item_struct_name #user_ty_generics_with_world_and_state;
 
-                fn shrink<'__wlong: '__wshort, '__wshort>(
+                fn shrink<'__wlong: '__wshort, '__wshort, '__s>(
-                    item: Self::Item<'__wlong>
+                    item: Self::Item<'__wlong, '__s>
-                ) -> Self::Item<'__wshort> {
+                ) -> Self::Item<'__wshort, '__s> {
                     #item_struct_name {
                         #(
                             #field_idents: <#field_types>::shrink(item.#field_idents),
@@ -323,13 +347,26 @@ pub fn derive_query_data_impl(input: TokenStream) -> TokenStream {
 
                 /// SAFETY: we call `fetch` for each member that implements `Fetch`.
                 #[inline(always)]
-                unsafe fn fetch<'__w>(
+                unsafe fn fetch<'__w, '__s>(
+                    _state: &'__s Self::State,
                     _fetch: &mut <Self as #path::query::WorldQuery>::Fetch<'__w>,
                     _entity: #path::entity::Entity,
                     _table_row: #path::storage::TableRow,
-                ) -> Self::Item<'__w> {
+                ) -> Self::Item<'__w, '__s> {
                     Self::Item {
-                        #(#field_idents: <#field_types>::fetch(&mut _fetch.#named_field_idents, _entity, _table_row),)*
+                        #(#field_idents: <#field_types>::fetch(&_state.#named_field_idents, &mut _fetch.#named_field_idents, _entity, _table_row),)*
+                    }
+                }
+            }
+
+            impl #user_impl_generics #path::query::ReleaseStateQueryData
+            for #struct_name #user_ty_generics #user_where_clauses
+            // Make these HRTBs with an unused lifetime parameter to allow trivial constraints
+            // See https://github.com/rust-lang/rust/issues/48214
+            where #(for<'__a> #field_types: #path::query::ReleaseStateQueryData,)* {
+                fn release_state<'__w>(_item: Self::Item<'__w, '_>) -> Self::Item<'__w, 'static> {
+                    Self::Item {
+                        #(#field_idents: <#field_types>::release_state(_item.#field_idents),)*
                     }
                 }
             }

crates/bevy_ecs/macros/src/query_filter.rs

@@ -102,11 +102,12 @@ pub fn derive_query_filter_impl(input: TokenStream) -> TokenStream {
             #[allow(unused_variables)]
             #[inline(always)]
             unsafe fn filter_fetch<'__w>(
+                _state: &Self::State,
                 _fetch: &mut <Self as #path::query::WorldQuery>::Fetch<'__w>,
                 _entity: #path::entity::Entity,
                 _table_row: #path::storage::TableRow,
             ) -> bool {
-                true #(&& <#field_types>::filter_fetch(&mut _fetch.#named_field_idents, _entity, _table_row))*
+                true #(&& <#field_types>::filter_fetch(&_state.#named_field_idents, &mut _fetch.#named_field_idents, _entity, _table_row))*
             }
         }
     };

crates/bevy_ecs/macros/src/world_query.rs

@@ -10,13 +10,13 @@ pub(crate) fn item_struct(
     visibility: &Visibility,
     item_struct_name: &Ident,
     field_types: &Vec<proc_macro2::TokenStream>,
-    user_impl_generics_with_world: &ImplGenerics,
+    user_impl_generics_with_world_and_state: &ImplGenerics,
     field_attrs: &Vec<Vec<Attribute>>,
     field_visibilities: &Vec<Visibility>,
     field_idents: &Vec<proc_macro2::TokenStream>,
     user_ty_generics: &TypeGenerics,
-    user_ty_generics_with_world: &TypeGenerics,
+    user_ty_generics_with_world_and_state: &TypeGenerics,
-    user_where_clauses_with_world: Option<&WhereClause>,
+    user_where_clauses_with_world_and_state: Option<&WhereClause>,
 ) -> proc_macro2::TokenStream {
     let item_attrs = quote! {
         #[doc = concat!(
@@ -33,20 +33,20 @@ pub(crate) fn item_struct(
         Fields::Named(_) => quote! {
             #derive_macro_call
             #item_attrs
-            #visibility struct #item_struct_name #user_impl_generics_with_world #user_where_clauses_with_world {
+            #visibility struct #item_struct_name #user_impl_generics_with_world_and_state #user_where_clauses_with_world_and_state {
-                #(#(#field_attrs)* #field_visibilities #field_idents: <#field_types as #path::query::QueryData>::Item<'__w>,)*
+                #(#(#field_attrs)* #field_visibilities #field_idents: <#field_types as #path::query::QueryData>::Item<'__w, '__s>,)*
             }
         },
         Fields::Unnamed(_) => quote! {
             #derive_macro_call
             #item_attrs
-            #visibility struct #item_struct_name #user_impl_generics_with_world #user_where_clauses_with_world(
+            #visibility struct #item_struct_name #user_impl_generics_with_world_and_state #user_where_clauses_with_world_and_state(
-                #( #field_visibilities <#field_types as #path::query::QueryData>::Item<'__w>, )*
+                #( #field_visibilities <#field_types as #path::query::QueryData>::Item<'__w, '__s>, )*
             );
         },
         Fields::Unit => quote! {
             #item_attrs
-            #visibility type #item_struct_name #user_ty_generics_with_world = #struct_name #user_ty_generics;
+            #visibility type #item_struct_name #user_ty_generics_with_world_and_state = #struct_name #user_ty_generics;
         },
     }
 }
@@ -79,7 +79,7 @@ pub(crate) fn world_query_impl(
         #[automatically_derived]
         #visibility struct #fetch_struct_name #user_impl_generics_with_world #user_where_clauses_with_world {
             #(#named_field_idents: <#field_types as #path::query::WorldQuery>::Fetch<'__w>,)*
-            #marker_name: &'__w (),
+            #marker_name: &'__w(),
         }
 
         impl #user_impl_generics_with_world Clone for #fetch_struct_name #user_ty_generics_with_world
@@ -110,9 +110,9 @@ pub(crate) fn world_query_impl(
                 }
             }
 
-            unsafe fn init_fetch<'__w>(
+            unsafe fn init_fetch<'__w, '__s>(
                 _world: #path::world::unsafe_world_cell::UnsafeWorldCell<'__w>,
-                state: &Self::State,
+                state: &'__s Self::State,
                 _last_run: #path::component::Tick,
                 _this_run: #path::component::Tick,
             ) -> <Self as #path::query::WorldQuery>::Fetch<'__w> {
@@ -133,9 +133,9 @@ pub(crate) fn world_query_impl(
 
             /// SAFETY: we call `set_archetype` for each member that implements `Fetch`
             #[inline]
-            unsafe fn set_archetype<'__w>(
+            unsafe fn set_archetype<'__w, '__s>(
                 _fetch: &mut <Self as #path::query::WorldQuery>::Fetch<'__w>,
-                _state: &Self::State,
+                _state: &'__s Self::State,
                 _archetype: &'__w #path::archetype::Archetype,
                 _table: &'__w #path::storage::Table
             ) {
@@ -144,9 +144,9 @@ pub(crate) fn world_query_impl(
 
             /// SAFETY: we call `set_table` for each member that implements `Fetch`
             #[inline]
-            unsafe fn set_table<'__w>(
+            unsafe fn set_table<'__w, '__s>(
                 _fetch: &mut <Self as #path::query::WorldQuery>::Fetch<'__w>,
-                _state: &Self::State,
+                _state: &'__s Self::State,
                 _table: &'__w #path::storage::Table
             ) {
                 #(<#field_types>::set_table(&mut _fetch.#named_field_idents, &_state.#named_field_idents, _table);)*

crates/bevy_ecs/src/bundle.rs

@@ -550,10 +550,9 @@ impl BundleInfo {
                     // SAFETY: the caller ensures component_id is valid.
                     unsafe { components.get_info_unchecked(id).name() }
                 })
-                .collect::<Vec<_>>()
+                .collect::<Vec<_>>();
-                .join(", ");
 
-            panic!("Bundle {bundle_type_name} has duplicate components: {names}");
+            panic!("Bundle {bundle_type_name} has duplicate components: {names:?}");
         }
 
         // handle explicit components

crates/bevy_ecs/src/component.rs

@@ -24,7 +24,7 @@ use bevy_platform::{
 use bevy_ptr::{OwningPtr, UnsafeCellDeref};
 #[cfg(feature = "bevy_reflect")]
 use bevy_reflect::Reflect;
-use bevy_utils::TypeIdMap;
+use bevy_utils::{prelude::DebugName, TypeIdMap};
 use core::{
     alloc::Layout,
     any::{Any, TypeId},
@@ -34,7 +34,6 @@ use core::{
     mem::needs_drop,
     ops::{Deref, DerefMut},
 };
-use disqualified::ShortName;
 use smallvec::SmallVec;
 use thiserror::Error;
 
@@ -678,8 +677,8 @@ impl ComponentInfo {
 
     /// Returns the name of the current component.
     #[inline]
-    pub fn name(&self) -> &str {
+    pub fn name(&self) -> DebugName {
-        &self.descriptor.name
+        self.descriptor.name.clone()
     }
 
     /// Returns `true` if the current component is mutable.
@@ -836,7 +835,7 @@ impl SparseSetIndex for ComponentId {
 /// A value describing a component or resource, which may or may not correspond to a Rust type.
 #[derive(Clone)]
 pub struct ComponentDescriptor {
-    name: Cow<'static, str>,
+    name: DebugName,
     // SAFETY: This must remain private. It must match the statically known StorageType of the
     // associated rust component type if one exists.
     storage_type: StorageType,
@@ -882,7 +881,7 @@ impl ComponentDescriptor {
     /// Create a new `ComponentDescriptor` for the type `T`.
     pub fn new<T: Component>() -> Self {
         Self {
-            name: Cow::Borrowed(core::any::type_name::<T>()),
+            name: DebugName::type_name::<T>(),
             storage_type: T::STORAGE_TYPE,
             is_send_and_sync: true,
             type_id: Some(TypeId::of::<T>()),
@@ -907,7 +906,7 @@ impl ComponentDescriptor {
         clone_behavior: ComponentCloneBehavior,
     ) -> Self {
         Self {
-            name: name.into(),
+            name: name.into().into(),
             storage_type,
             is_send_and_sync: true,
             type_id: None,
@@ -923,7 +922,7 @@ impl ComponentDescriptor {
     /// The [`StorageType`] for resources is always [`StorageType::Table`].
     pub fn new_resource<T: Resource>() -> Self {
         Self {
-            name: Cow::Borrowed(core::any::type_name::<T>()),
+            name: DebugName::type_name::<T>(),
             // PERF: `SparseStorage` may actually be a more
             // reasonable choice as `storage_type` for resources.
             storage_type: StorageType::Table,
@@ -938,7 +937,7 @@ impl ComponentDescriptor {
 
     fn new_non_send<T: Any>(storage_type: StorageType) -> Self {
         Self {
-            name: Cow::Borrowed(core::any::type_name::<T>()),
+            name: DebugName::type_name::<T>(),
             storage_type,
             is_send_and_sync: false,
             type_id: Some(TypeId::of::<T>()),
@@ -964,8 +963,8 @@ impl ComponentDescriptor {
 
     /// Returns the name of the current component.
     #[inline]
-    pub fn name(&self) -> &str {
+    pub fn name(&self) -> DebugName {
-        self.name.as_ref()
+        self.name.clone()
     }
 
     /// Returns whether this component is mutable.
@@ -1854,13 +1853,10 @@ impl Components {
     ///
     /// This will return an incorrect result if `id` did not come from the same world as `self`. It may return `None` or a garbage value.
     #[inline]
-    pub fn get_name<'a>(&'a self, id: ComponentId) -> Option<Cow<'a, str>> {
+    pub fn get_name<'a>(&'a self, id: ComponentId) -> Option<DebugName> {
         self.components
             .get(id.0)
-            .and_then(|info| {
+            .and_then(|info| info.as_ref().map(|info| info.descriptor.name()))
-                info.as_ref()
-                    .map(|info| Cow::Borrowed(info.descriptor.name()))
-            })
             .or_else(|| {
                 let queued = self.queued.read().unwrap_or_else(PoisonError::into_inner);
                 // first check components, then resources, then dynamic
@@ -2813,13 +2809,13 @@ pub fn enforce_no_required_components_recursion(
                 "Recursive required components detected: {}\nhelp: {}",
                 recursion_check_stack
                     .iter()
-                    .map(|id| format!("{}", ShortName(&components.get_name(*id).unwrap())))
+                    .map(|id| format!("{}", components.get_name(*id).unwrap().shortname()))
                     .collect::<Vec<_>>()
                     .join(" → "),
                 if direct_recursion {
                     format!(
                         "Remove require({}).",
-                        ShortName(&components.get_name(requiree).unwrap())
+                        components.get_name(requiree).unwrap().shortname()
                     )
                 } else {
                     "If this is intentional, consider merging the components.".into()

crates/bevy_ecs/src/entity/clone_entities.rs

@@ -10,6 +10,7 @@ use crate::{
 use alloc::{borrow::ToOwned, boxed::Box, collections::VecDeque, vec::Vec};
 use bevy_platform::collections::{HashMap, HashSet};
 use bevy_ptr::{Ptr, PtrMut};
+use bevy_utils::prelude::DebugName;
 use bumpalo::Bump;
 use core::any::TypeId;
 
@@ -172,7 +173,8 @@ impl<'a, 'b> ComponentCloneCtx<'a, 'b> {
     /// - `ComponentId` of component being written does not match expected `ComponentId`.
     pub fn write_target_component<C: Component>(&mut self, mut component: C) {
         C::map_entities(&mut component, &mut self.mapper);
-        let short_name = disqualified::ShortName::of::<C>();
+        let debug_name = DebugName::type_name::<C>();
+        let short_name = debug_name.shortname();
         if self.target_component_written {
             panic!("Trying to write component '{short_name}' multiple times")
         }

crates/bevy_ecs/src/error/command_handling.rs

@@ -1,4 +1,6 @@
-use core::{any::type_name, fmt};
+use core::fmt;
+
+use bevy_utils::prelude::DebugName;
 
 use crate::{
     entity::Entity,
@@ -31,7 +33,7 @@ where
             Err(err) => (error_handler)(
                 err.into(),
                 ErrorContext::Command {
-                    name: type_name::<C>().into(),
+                    name: DebugName::type_name::<C>(),
                 },
             ),
         }
@@ -43,7 +45,7 @@ where
             Err(err) => world.default_error_handler()(
                 err.into(),
                 ErrorContext::Command {
-                    name: type_name::<C>().into(),
+                    name: DebugName::type_name::<C>(),
                 },
             ),
         }

crates/bevy_ecs/src/error/handler.rs

@@ -1,7 +1,7 @@
 use core::fmt::Display;
 
 use crate::{component::Tick, error::BevyError, prelude::Resource};
-use alloc::borrow::Cow;
+use bevy_utils::prelude::DebugName;
 use derive_more::derive::{Deref, DerefMut};
 
 /// Context for a [`BevyError`] to aid in debugging.
@@ -10,26 +10,26 @@ pub enum ErrorContext {
     /// The error occurred in a system.
     System {
         /// The name of the system that failed.
-        name: Cow<'static, str>,
+        name: DebugName,
         /// The last tick that the system was run.
         last_run: Tick,
     },
     /// The error occurred in a run condition.
     RunCondition {
         /// The name of the run condition that failed.
-        name: Cow<'static, str>,
+        name: DebugName,
         /// The last tick that the run condition was evaluated.
         last_run: Tick,
     },
     /// The error occurred in a command.
     Command {
         /// The name of the command that failed.
-        name: Cow<'static, str>,
+        name: DebugName,
     },
     /// The error occurred in an observer.
     Observer {
         /// The name of the observer that failed.
-        name: Cow<'static, str>,
+        name: DebugName,
         /// The last tick that the observer was run.
         last_run: Tick,
     },
@@ -54,12 +54,12 @@ impl Display for ErrorContext {
 
 impl ErrorContext {
     /// The name of the ECS construct that failed.
-    pub fn name(&self) -> &str {
+    pub fn name(&self) -> DebugName {
         match self {
             Self::System { name, .. }
             | Self::Command { name, .. }
             | Self::Observer { name, .. }
-            | Self::RunCondition { name, .. } => name,
+            | Self::RunCondition { name, .. } => name.clone(),
         }
     }
 

crates/bevy_ecs/src/hierarchy.rs

@@ -22,9 +22,9 @@ use alloc::{format, string::String, vec::Vec};
 use bevy_reflect::std_traits::ReflectDefault;
 #[cfg(all(feature = "serialize", feature = "bevy_reflect"))]
 use bevy_reflect::{ReflectDeserialize, ReflectSerialize};
+use bevy_utils::prelude::DebugName;
 use core::ops::Deref;
 use core::slice;
-use disqualified::ShortName;
 use log::warn;
 
 /// Stores the parent entity of this child entity with this component.
@@ -461,11 +461,12 @@ pub fn validate_parent_has_component<C: Component>(
     {
         // TODO: print name here once Name lives in bevy_ecs
         let name: Option<String> = None;
+        let debug_name = DebugName::type_name::<C>();
         warn!(
             "warning[B0004]: {}{name} with the {ty_name} component has a parent without {ty_name}.\n\
             This will cause inconsistent behaviors! See: https://bevy.org/learn/errors/b0004",
             caller.map(|c| format!("{c}: ")).unwrap_or_default(),
-            ty_name = ShortName::of::<C>(),
+            ty_name = debug_name.shortname(),
             name = name.map_or_else(
                 || format!("Entity {entity}"),
                 |s| format!("The {s} entity")

crates/bevy_ecs/src/lifecycle.rs

@@ -328,7 +328,7 @@ pub const DESPAWN: ComponentId = ComponentId::new(4);
 /// Trigger emitted when a component is inserted onto an entity that does not already have that
 /// component. Runs before `Insert`.
 /// See [`crate::lifecycle::ComponentHooks::on_add`] for more information.
-#[derive(Event, EntityEvent, Debug)]
+#[derive(Event, EntityEvent, Debug, Clone)]
 #[cfg_attr(feature = "bevy_reflect", derive(Reflect))]
 #[cfg_attr(feature = "bevy_reflect", reflect(Debug))]
 #[doc(alias = "OnAdd")]
@@ -337,7 +337,7 @@ pub struct Add;
 /// Trigger emitted when a component is inserted, regardless of whether or not the entity already
 /// had that component. Runs after `Add`, if it ran.
 /// See [`crate::lifecycle::ComponentHooks::on_insert`] for more information.
-#[derive(Event, EntityEvent, Debug)]
+#[derive(Event, EntityEvent, Debug, Clone)]
 #[cfg_attr(feature = "bevy_reflect", derive(Reflect))]
 #[cfg_attr(feature = "bevy_reflect", reflect(Debug))]
 #[doc(alias = "OnInsert")]
@@ -348,7 +348,7 @@ pub struct Insert;
 ///
 /// Runs before the value is replaced, so you can still access the original component data.
 /// See [`crate::lifecycle::ComponentHooks::on_replace`] for more information.
-#[derive(Event, EntityEvent, Debug)]
+#[derive(Event, EntityEvent, Debug, Clone)]
 #[cfg_attr(feature = "bevy_reflect", derive(Reflect))]
 #[cfg_attr(feature = "bevy_reflect", reflect(Debug))]
 #[doc(alias = "OnReplace")]
@@ -357,7 +357,7 @@ pub struct Replace;
 /// Trigger emitted when a component is removed from an entity, and runs before the component is
 /// removed, so you can still access the component data.
 /// See [`crate::lifecycle::ComponentHooks::on_remove`] for more information.
-#[derive(Event, EntityEvent, Debug)]
+#[derive(Event, EntityEvent, Debug, Clone)]
 #[cfg_attr(feature = "bevy_reflect", derive(Reflect))]
 #[cfg_attr(feature = "bevy_reflect", reflect(Debug))]
 #[doc(alias = "OnRemove")]
@@ -365,7 +365,7 @@ pub struct Remove;
 
 /// Trigger emitted for each component on an entity when it is despawned.
 /// See [`crate::lifecycle::ComponentHooks::on_despawn`] for more information.
-#[derive(Event, EntityEvent, Debug)]
+#[derive(Event, EntityEvent, Debug, Clone)]
 #[cfg_attr(feature = "bevy_reflect", derive(Reflect))]
 #[cfg_attr(feature = "bevy_reflect", reflect(Debug))]
 #[doc(alias = "OnDespawn")]

crates/bevy_ecs/src/name.rs

@@ -141,7 +141,7 @@ pub struct NameOrEntity {
     pub entity: Entity,
 }
 
-impl<'a> core::fmt::Display for NameOrEntityItem<'a> {
+impl<'w, 's> core::fmt::Display for NameOrEntityItem<'w, 's> {
     #[inline(always)]
     fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
         match self.name {
@@ -274,9 +274,9 @@ mod tests {
         let e2 = world.spawn(name.clone()).id();
         let mut query = world.query::<NameOrEntity>();
         let d1 = query.get(&world, e1).unwrap();
-        let d2 = query.get(&world, e2).unwrap();
         // NameOrEntity Display for entities without a Name should be {index}v{generation}
         assert_eq!(d1.to_string(), "0v0");
+        let d2 = query.get(&world, e2).unwrap();
         // NameOrEntity Display for entities with a Name should be the Name
         assert_eq!(d2.to_string(), "MyName");
     }

crates/bevy_ecs/src/observer/entity_observer.rs

@@ -97,7 +97,7 @@ fn component_clone_observed_by(_source: &SourceComponent, ctx: &mut ComponentClo
             let event_types = observer_state.descriptor.events.clone();
             let components = observer_state.descriptor.components.clone();
             for event_type in event_types {
-                let observers = world.observers.get_observers(event_type);
+                let observers = world.observers.get_observers_mut(event_type);
                 if components.is_empty() {
                     if let Some(map) = observers.entity_observers.get(&source).cloned() {
                         observers.entity_observers.insert(target, map);
@@ -108,8 +108,10 @@ fn component_clone_observed_by(_source: &SourceComponent, ctx: &mut ComponentClo
                         else {
                             continue;
                         };
-                        if let Some(map) = observers.entity_map.get(&source).cloned() {
+                        if let Some(map) =
-                            observers.entity_map.insert(target, map);
+                            observers.entity_component_observers.get(&source).cloned()
+                        {
+                            observers.entity_component_observers.insert(target, map);
                         }
                     }
                 }

crates/bevy_ecs/src/observer/mod.rs

@@ -515,40 +515,72 @@ impl ObserverTrigger {
     }
 }
 
-// Map between an observer entity and its runner
+/// Map between an observer entity and its [`ObserverRunner`]
-type ObserverMap = EntityHashMap<ObserverRunner>;
+pub type ObserverMap = EntityHashMap<ObserverRunner>;
 
-/// Collection of [`ObserverRunner`] for [`Observer`] registered to a particular trigger targeted at a specific component.
+/// Collection of [`ObserverRunner`] for [`Observer`] registered to a particular event targeted at a specific component.
 ///
 /// This is stored inside of [`CachedObservers`].
 #[derive(Default, Debug)]
 pub struct CachedComponentObservers {
-    // Observers listening to triggers targeting this component
+    // Observers listening to events targeting this component, but not a specific entity
-    map: ObserverMap,
+    global_observers: ObserverMap,
-    // Observers listening to triggers targeting this component on a specific entity
+    // Observers listening to events targeting this component on a specific entity
-    entity_map: EntityHashMap<ObserverMap>,
+    entity_component_observers: EntityHashMap<ObserverMap>,
 }
 
-/// Collection of [`ObserverRunner`] for [`Observer`] registered to a particular trigger.
+impl CachedComponentObservers {
+    /// Returns the observers listening for this trigger, regardless of target.
+    /// These observers will also respond to events targeting specific entities.
+    pub fn global_observers(&self) -> &ObserverMap {
+        &self.global_observers
+    }
+
+    /// Returns the observers listening for this trigger targeting this component on a specific entity.
+    pub fn entity_component_observers(&self) -> &EntityHashMap<ObserverMap> {
+        &self.entity_component_observers
+    }
+}
+
+/// Collection of [`ObserverRunner`] for [`Observer`] registered to a particular event.
 ///
 /// This is stored inside of [`Observers`], specialized for each kind of observer.
 #[derive(Default, Debug)]
 pub struct CachedObservers {
-    // Observers listening for any time this trigger is fired
+    // Observers listening for any time this event is fired, regardless of target
-    map: ObserverMap,
+    // This will also respond to events targeting specific components or entities
+    global_observers: ObserverMap,
     // Observers listening for this trigger fired at a specific component
     component_observers: HashMap<ComponentId, CachedComponentObservers>,
     // Observers listening for this trigger fired at a specific entity
     entity_observers: EntityHashMap<ObserverMap>,
 }
 
+impl CachedObservers {
+    /// Returns the observers listening for this trigger, regardless of target.
+    /// These observers will also respond to events targeting specific components or entities.
+    pub fn global_observers(&self) -> &ObserverMap {
+        &self.global_observers
+    }
+
+    /// Returns the observers listening for this trigger targeting components.
+    pub fn get_component_observers(&self) -> &HashMap<ComponentId, CachedComponentObservers> {
+        &self.component_observers
+    }
+
+    /// Returns the observers listening for this trigger targeting entities.
+    pub fn entity_observers(&self) -> &HashMap<ComponentId, CachedComponentObservers> {
+        &self.component_observers
+    }
+}
+
 /// An internal lookup table tracking all of the observers in the world.
 ///
 /// Stores a cache mapping trigger ids to the registered observers.
 /// Some observer kinds (like [lifecycle](crate::lifecycle) observers) have a dedicated field,
 /// saving lookups for the most common triggers.
 ///
-/// This is stored as a field of the [`World`].
+/// This can be accessed via [`World::observers`].
 #[derive(Default, Debug)]
 pub struct Observers {
     // Cached ECS observers to save a lookup most common triggers.
@@ -562,7 +594,7 @@ pub struct Observers {
 }
 
 impl Observers {
-    pub(crate) fn get_observers(&mut self, event_type: ComponentId) -> &mut CachedObservers {
+    pub(crate) fn get_observers_mut(&mut self, event_type: ComponentId) -> &mut CachedObservers {
         use crate::lifecycle::*;
 
         match event_type {
@@ -575,7 +607,11 @@ impl Observers {
         }
     }
 
-    pub(crate) fn try_get_observers(&self, event_type: ComponentId) -> Option<&CachedObservers> {
+    /// Attempts to get the observers for the given `event_type`.
+    ///
+    /// When accessing the observers for lifecycle events, such as [`Add`], [`Insert`], [`Replace`], [`Remove`], and [`Despawn`],
+    /// use the [`ComponentId`] constants from the [`lifecycle`](crate::lifecycle) module.
+    pub fn try_get_observers(&self, event_type: ComponentId) -> Option<&CachedObservers> {
         use crate::lifecycle::*;
 
         match event_type {
@@ -630,7 +666,10 @@ impl Observers {
             );
         };
         // Trigger observers listening for any kind of this trigger
-        observers.map.iter().for_each(&mut trigger_observer);
+        observers
+            .global_observers
+            .iter()
+            .for_each(&mut trigger_observer);
 
         // Trigger entity observers listening for this kind of trigger
         if let Some(target_entity) = current_target {
@@ -643,12 +682,15 @@ impl Observers {
         trigger_for_components.for_each(|id| {
             if let Some(component_observers) = observers.component_observers.get(&id) {
                 component_observers
-                    .map
+                    .global_observers
                     .iter()
                     .for_each(&mut trigger_observer);
 
                 if let Some(target_entity) = current_target {
-                    if let Some(map) = component_observers.entity_map.get(&target_entity) {
+                    if let Some(map) = component_observers
+                        .entity_component_observers
+                        .get(&target_entity)
+                    {
                         map.iter().for_each(&mut trigger_observer);
                     }
                 }
@@ -926,10 +968,12 @@ impl World {
         let descriptor = &observer_state.descriptor;
 
         for &event_type in &descriptor.events {
-            let cache = observers.get_observers(event_type);
+            let cache = observers.get_observers_mut(event_type);
 
             if descriptor.components.is_empty() && descriptor.entities.is_empty() {
-                cache.map.insert(observer_entity, observer_state.runner);
+                cache
+                    .global_observers
+                    .insert(observer_entity, observer_state.runner);
             } else if descriptor.components.is_empty() {
                 // Observer is not targeting any components so register it as an entity observer
                 for &watched_entity in &observer_state.descriptor.entities {
@@ -951,11 +995,16 @@ impl World {
                             });
                     if descriptor.entities.is_empty() {
                         // Register for all triggers targeting the component
-                        observers.map.insert(observer_entity, observer_state.runner);
+                        observers
+                            .global_observers
+                            .insert(observer_entity, observer_state.runner);
                     } else {
                         // Register for each watched entity
                         for &watched_entity in &descriptor.entities {
-                            let map = observers.entity_map.entry(watched_entity).or_default();
+                            let map = observers
+                                .entity_component_observers
+                                .entry(watched_entity)
+                                .or_default();
                             map.insert(observer_entity, observer_state.runner);
                         }
                     }
@@ -970,9 +1019,9 @@ impl World {
         let observers = &mut self.observers;
 
         for &event_type in &descriptor.events {
-            let cache = observers.get_observers(event_type);
+            let cache = observers.get_observers_mut(event_type);
             if descriptor.components.is_empty() && descriptor.entities.is_empty() {
-                cache.map.remove(&entity);
+                cache.global_observers.remove(&entity);
             } else if descriptor.components.is_empty() {
                 for watched_entity in &descriptor.entities {
                     // This check should be unnecessary since this observer hasn't been unregistered yet
@@ -990,20 +1039,24 @@ impl World {
                         continue;
                     };
                     if descriptor.entities.is_empty() {
-                        observers.map.remove(&entity);
+                        observers.global_observers.remove(&entity);
                     } else {
                         for watched_entity in &descriptor.entities {
-                            let Some(map) = observers.entity_map.get_mut(watched_entity) else {
+                            let Some(map) =
+                                observers.entity_component_observers.get_mut(watched_entity)
+                            else {
                                 continue;
                             };
                             map.remove(&entity);
                             if map.is_empty() {
-                                observers.entity_map.remove(watched_entity);
+                                observers.entity_component_observers.remove(watched_entity);
                             }
                         }
                     }
 
-                    if observers.map.is_empty() && observers.entity_map.is_empty() {
+                    if observers.global_observers.is_empty()
+                        && observers.entity_component_observers.is_empty()
+                    {
                         cache.component_observers.remove(component);
                         if let Some(flag) = Observers::is_archetype_cached(event_type) {
                             if let Some(by_component) = archetypes.by_component.get(component) {
@@ -1078,7 +1131,7 @@ mod tests {
     struct ChildOf(Entity);
 
     impl<D> Traversal<D> for &'_ ChildOf {
-        fn traverse(item: Self::Item<'_>, _: &D) -> Option<Entity> {
+        fn traverse(item: Self::Item<'_, '_>, _: &D) -> Option<Entity> {
             Some(item.0)
         }
     }

crates/bevy_ecs/src/observer/runner.rs

@@ -1,4 +1,5 @@
 use alloc::{boxed::Box, vec};
+use bevy_utils::prelude::DebugName;
 use core::any::Any;
 
 use crate::{
@@ -194,7 +195,7 @@ pub type ObserverRunner = fn(DeferredWorld, ObserverTrigger, PtrMut, propagate:
 pub struct Observer {
     hook_on_add: ComponentHook,
     error_handler: Option<ErrorHandler>,
-    system: Box<dyn Any + Send + Sync + 'static>,
+    system: Box<dyn AnyNamedSystem>,
     pub(crate) descriptor: ObserverDescriptor,
     pub(crate) last_trigger_id: u32,
     pub(crate) despawned_watched_entities: u32,
@@ -232,7 +233,7 @@ impl Observer {
     /// Creates a new [`Observer`] with custom runner, this is mostly used for dynamic event observer
     pub fn with_dynamic_runner(runner: ObserverRunner) -> Self {
         Self {
-            system: Box::new(|| {}),
+            system: Box::new(IntoSystem::into_system(|| {})),
             descriptor: Default::default(),
             hook_on_add: |mut world, hook_context| {
                 let default_error_handler = world.default_error_handler();
@@ -299,6 +300,11 @@ impl Observer {
     pub fn descriptor(&self) -> &ObserverDescriptor {
         &self.descriptor
     }
+
+    /// Returns the name of the [`Observer`]'s system .
+    pub fn system_name(&self) -> DebugName {
+        self.system.system_name()
+    }
 }
 
 impl Component for Observer {
@@ -364,7 +370,8 @@ fn observer_system_runner<E: Event, B: Bundle, S: ObserverSystem<E, B>>(
     // - observer was triggered so must have an `Observer` component.
     // - observer cannot be dropped or mutated until after the system pointer is already dropped.
     let system: *mut dyn ObserverSystem<E, B> = unsafe {
-        let system = state.system.downcast_mut::<S>().debug_checked_unwrap();
+        let system: &mut dyn Any = state.system.as_mut();
+        let system = system.downcast_mut::<S>().debug_checked_unwrap();
         &mut *system
     };
 
@@ -413,6 +420,16 @@ fn observer_system_runner<E: Event, B: Bundle, S: ObserverSystem<E, B>>(
     }
 }
 
+trait AnyNamedSystem: Any + Send + Sync + 'static {
+    fn system_name(&self) -> DebugName;
+}
+
+impl<T: Any + System> AnyNamedSystem for T {
+    fn system_name(&self) -> DebugName {
+        self.name()
+    }
+}
+
 /// A [`ComponentHook`] used by [`Observer`] to handle its [`on-add`](`crate::lifecycle::ComponentHooks::on_add`).
 ///
 /// This function exists separate from [`Observer`] to allow [`Observer`] to have its type parameters
@@ -431,11 +448,12 @@ fn hook_on_add<E: Event, B: Bundle, S: ObserverSystem<E, B>>(
         B::component_ids(&mut world.components_registrator(), &mut |id| {
             components.push(id);
         });
-        if let Some(mut observe) = world.get_mut::<Observer>(entity) {
+        if let Some(mut observer) = world.get_mut::<Observer>(entity) {
-            observe.descriptor.events.push(event_id);
+            observer.descriptor.events.push(event_id);
-            observe.descriptor.components.extend(components);
+            observer.descriptor.components.extend(components);
 
-            let system: *mut dyn ObserverSystem<E, B> = observe.system.downcast_mut::<S>().unwrap();
+            let system: &mut dyn Any = observer.system.as_mut();
+            let system: *mut dyn ObserverSystem<E, B> = system.downcast_mut::<S>().unwrap();
             // SAFETY: World reference is exclusive and initialize does not touch system, so references do not alias
             unsafe {
                 (*system).initialize(world);

crates/bevy_ecs/src/query/access.rs

@@ -4,7 +4,6 @@ use crate::world::World;
 use alloc::{format, string::String, vec, vec::Vec};
 use core::{fmt, fmt::Debug, marker::PhantomData};
 use derive_more::From;
-use disqualified::ShortName;
 use fixedbitset::FixedBitSet;
 use thiserror::Error;
 
@@ -999,12 +998,11 @@ impl AccessConflicts {
                 .map(|index| {
                     format!(
                         "{}",
-                        ShortName(
+                        world
-                            &world
                             .components
                             .get_name(ComponentId::get_sparse_set_index(index))
                             .unwrap()
-                        )
+                            .shortname()
                     )
                 })
                 .collect::<Vec<_>>()

crates/bevy_ecs/src/query/error.rs

@@ -1,3 +1,6 @@
+use bevy_utils::prelude::DebugName;
+use thiserror::Error;
+
 use crate::{
     archetype::ArchetypeId,
     entity::{ConstructedEntityDoesNotExistError, Entity},
@@ -28,10 +31,10 @@ pub enum QueryEntityError {
 pub enum QuerySingleError {
     /// No entity fits the query.
     #[error("No entities fit the query {0}")]
-    NoEntities(&'static str),
+    NoEntities(DebugName),
     /// Multiple entities fit the query.
     #[error("Multiple entities fit the query {0}")]
-    MultipleEntities(&'static str),
+    MultipleEntities(DebugName),
 }
 
 #[cfg(test)]

crates/bevy_ecs/src/query/filter.rs

@@ -7,6 +7,7 @@ use crate::{
     world::{unsafe_world_cell::UnsafeWorldCell, World},
 };
 use bevy_ptr::{ThinSlicePtr, UnsafeCellDeref};
+use bevy_utils::prelude::DebugName;
 use core::{cell::UnsafeCell, marker::PhantomData};
 use variadics_please::all_tuples;
 
@@ -103,6 +104,7 @@ pub unsafe trait QueryFilter: WorldQuery {
     /// Must always be called _after_ [`WorldQuery::set_table`] or [`WorldQuery::set_archetype`]. `entity` and
     /// `table_row` must be in the range of the current table and archetype.
     unsafe fn filter_fetch(
+        state: &Self::State,
         fetch: &mut Self::Fetch<'_>,
         entity: Entity,
         table_row: TableRow,
@@ -204,6 +206,7 @@ unsafe impl<T: Component> QueryFilter for With<T> {
 
     #[inline(always)]
     unsafe fn filter_fetch(
+        _state: &Self::State,
         _fetch: &mut Self::Fetch<'_>,
         _entity: Entity,
         _table_row: TableRow,
@@ -304,6 +307,7 @@ unsafe impl<T: Component> QueryFilter for Without<T> {
 
     #[inline(always)]
     unsafe fn filter_fetch(
+        _state: &Self::State,
         _fetch: &mut Self::Fetch<'_>,
         _entity: Entity,
         _table_row: TableRow,
@@ -400,7 +404,7 @@ macro_rules! impl_or_query_filter {
             const IS_DENSE: bool = true $(&& $filter::IS_DENSE)*;
 
             #[inline]
-            unsafe fn init_fetch<'w>(world: UnsafeWorldCell<'w>, state: &Self::State, last_run: Tick, this_run: Tick) -> Self::Fetch<'w> {
+            unsafe fn init_fetch<'w, 's>(world: UnsafeWorldCell<'w>, state: &'s Self::State, last_run: Tick, this_run: Tick) -> Self::Fetch<'w> {
                 let ($($filter,)*) = state;
                 ($(OrFetch {
                     // SAFETY: The invariants are upheld by the caller.
@@ -410,7 +414,7 @@ macro_rules! impl_or_query_filter {
             }
 
             #[inline]
-            unsafe fn set_table<'w>(fetch: &mut Self::Fetch<'w>, state: &Self::State, table: &'w Table) {
+            unsafe fn set_table<'w, 's>(fetch: &mut Self::Fetch<'w>, state: &'s Self::State, table: &'w Table) {
                 let ($($filter,)*) = fetch;
                 let ($($state,)*) = state;
                 $(
@@ -423,9 +427,9 @@ macro_rules! impl_or_query_filter {
             }
 
             #[inline]
-            unsafe fn set_archetype<'w>(
+            unsafe fn set_archetype<'w, 's>(
                 fetch: &mut Self::Fetch<'w>,
-                state: & Self::State,
+                state: &'s Self::State,
                 archetype: &'w Archetype,
                 table: &'w Table
             ) {
@@ -495,20 +499,22 @@ macro_rules! impl_or_query_filter {
 
             #[inline(always)]
             unsafe fn filter_fetch(
+                state: &Self::State,
                 fetch: &mut Self::Fetch<'_>,
                 entity: Entity,
                 table_row: TableRow
             ) -> bool {
+                let ($($state,)*) = state;
                 let ($($filter,)*) = fetch;
                 // SAFETY: The invariants are upheld by the caller.
-                false $(|| ($filter.matches && unsafe { $filter::filter_fetch(&mut $filter.fetch, entity, table_row) }))*
+                false $(|| ($filter.matches && unsafe { $filter::filter_fetch($state, &mut $filter.fetch, entity, table_row) }))*
             }
         }
     };
 }
 
 macro_rules! impl_tuple_query_filter {
-    ($(#[$meta:meta])* $($name: ident),*) => {
+    ($(#[$meta:meta])* $(($name: ident, $state: ident)),*) => {
         #[expect(
             clippy::allow_attributes,
             reason = "This is a tuple-related macro; as such the lints below may not always apply."
@@ -528,13 +534,15 @@ macro_rules! impl_tuple_query_filter {
 
             #[inline(always)]
             unsafe fn filter_fetch(
+                state: &Self::State,
                 fetch: &mut Self::Fetch<'_>,
                 entity: Entity,
                 table_row: TableRow
             ) -> bool {
+                let ($($state,)*) = state;
                 let ($($name,)*) = fetch;
                 // SAFETY: The invariants are upheld by the caller.
-                true $(&& unsafe { $name::filter_fetch($name, entity, table_row) })*
+                true $(&& unsafe { $name::filter_fetch($state, $name, entity, table_row) })*
             }
         }
 
@@ -546,7 +554,8 @@ all_tuples!(
     impl_tuple_query_filter,
     0,
     15,
-    F
+    F,
+    S
 );
 all_tuples!(
     #[doc(fake_variadic)]
@@ -609,7 +618,12 @@ unsafe impl<T: Component> QueryFilter for Allows<T> {
     const IS_ARCHETYPAL: bool = true;
 
     #[inline(always)]
-    unsafe fn filter_fetch(_: &mut Self::Fetch<'_>, _: Entity, _: TableRow) -> bool {
+    unsafe fn filter_fetch(
+        _: &Self::State,
+        _: &mut Self::Fetch<'_>,
+        _: Entity,
+        _: TableRow,
+    ) -> bool {
         true
     }
 }
@@ -718,9 +732,9 @@ unsafe impl<T: Component> WorldQuery for Added<T> {
     }
 
     #[inline]
-    unsafe fn init_fetch<'w>(
+    unsafe fn init_fetch<'w, 's>(
         world: UnsafeWorldCell<'w>,
-        &id: &ComponentId,
+        &id: &'s ComponentId,
         last_run: Tick,
         this_run: Tick,
     ) -> Self::Fetch<'w> {
@@ -748,9 +762,9 @@ unsafe impl<T: Component> WorldQuery for Added<T> {
     };
 
     #[inline]
-    unsafe fn set_archetype<'w>(
+    unsafe fn set_archetype<'w, 's>(
         fetch: &mut Self::Fetch<'w>,
-        component_id: &ComponentId,
+        component_id: &'s ComponentId,
         _archetype: &'w Archetype,
         table: &'w Table,
     ) {
@@ -763,9 +777,9 @@ unsafe impl<T: Component> WorldQuery for Added<T> {
     }
 
     #[inline]
-    unsafe fn set_table<'w>(
+    unsafe fn set_table<'w, 's>(
         fetch: &mut Self::Fetch<'w>,
-        &component_id: &ComponentId,
+        &component_id: &'s ComponentId,
         table: &'w Table,
     ) {
         let table_ticks = Some(
@@ -781,7 +795,7 @@ unsafe impl<T: Component> WorldQuery for Added<T> {
     #[inline]
     fn update_component_access(&id: &ComponentId, access: &mut FilteredAccess<ComponentId>) {
         if access.access().has_component_write(id) {
-            panic!("$state_name<{}> conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.",core::any::type_name::<T>());
+            panic!("$state_name<{}> conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.", DebugName::type_name::<T>());
         }
         access.add_component_read(id);
     }
@@ -807,6 +821,7 @@ unsafe impl<T: Component> QueryFilter for Added<T> {
     const IS_ARCHETYPAL: bool = false;
     #[inline(always)]
     unsafe fn filter_fetch(
+        _state: &Self::State,
         fetch: &mut Self::Fetch<'_>,
         entity: Entity,
         table_row: TableRow,
@@ -944,9 +959,9 @@ unsafe impl<T: Component> WorldQuery for Changed<T> {
     }
 
     #[inline]
-    unsafe fn init_fetch<'w>(
+    unsafe fn init_fetch<'w, 's>(
         world: UnsafeWorldCell<'w>,
-        &id: &ComponentId,
+        &id: &'s ComponentId,
         last_run: Tick,
         this_run: Tick,
     ) -> Self::Fetch<'w> {
@@ -974,9 +989,9 @@ unsafe impl<T: Component> WorldQuery for Changed<T> {
     };
 
     #[inline]
-    unsafe fn set_archetype<'w>(
+    unsafe fn set_archetype<'w, 's>(
         fetch: &mut Self::Fetch<'w>,
-        component_id: &ComponentId,
+        component_id: &'s ComponentId,
         _archetype: &'w Archetype,
         table: &'w Table,
     ) {
@@ -989,9 +1004,9 @@ unsafe impl<T: Component> WorldQuery for Changed<T> {
     }
 
     #[inline]
-    unsafe fn set_table<'w>(
+    unsafe fn set_table<'w, 's>(
         fetch: &mut Self::Fetch<'w>,
-        &component_id: &ComponentId,
+        &component_id: &'s ComponentId,
         table: &'w Table,
     ) {
         let table_ticks = Some(
@@ -1007,7 +1022,7 @@ unsafe impl<T: Component> WorldQuery for Changed<T> {
     #[inline]
     fn update_component_access(&id: &ComponentId, access: &mut FilteredAccess<ComponentId>) {
         if access.access().has_component_write(id) {
-            panic!("$state_name<{}> conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.",core::any::type_name::<T>());
+            panic!("$state_name<{}> conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.", DebugName::type_name::<T>());
         }
         access.add_component_read(id);
     }
@@ -1034,6 +1049,7 @@ unsafe impl<T: Component> QueryFilter for Changed<T> {
 
     #[inline(always)]
     unsafe fn filter_fetch(
+        _state: &Self::State,
         fetch: &mut Self::Fetch<'_>,
         entity: Entity,
         table_row: TableRow,
@@ -1141,9 +1157,9 @@ unsafe impl WorldQuery for Spawned {
     }
 
     #[inline]
-    unsafe fn init_fetch<'w>(
+    unsafe fn init_fetch<'w, 's>(
         world: UnsafeWorldCell<'w>,
-        _state: &(),
+        _state: &'s (),
         last_run: Tick,
         this_run: Tick,
     ) -> Self::Fetch<'w> {
@@ -1157,16 +1173,16 @@ unsafe impl WorldQuery for Spawned {
     const IS_DENSE: bool = true;
 
     #[inline]
-    unsafe fn set_archetype<'w>(
+    unsafe fn set_archetype<'w, 's>(
         _fetch: &mut Self::Fetch<'w>,
-        _state: &(),
+        _state: &'s (),
         _archetype: &'w Archetype,
         _table: &'w Table,
     ) {
     }
 
     #[inline]
-    unsafe fn set_table<'w>(_fetch: &mut Self::Fetch<'w>, _state: &(), _table: &'w Table) {}
+    unsafe fn set_table<'w, 's>(_fetch: &mut Self::Fetch<'w>, _state: &'s (), _table: &'w Table) {}
 
     #[inline]
     fn update_component_access(_state: &(), _access: &mut FilteredAccess<ComponentId>) {}
@@ -1188,6 +1204,7 @@ unsafe impl QueryFilter for Spawned {
 
     #[inline(always)]
     unsafe fn filter_fetch(
+        _state: &Self::State,
         fetch: &mut Self::Fetch<'_>,
         entity: Entity,
         _table_row: TableRow,

crates/bevy_ecs/src/query/iter.rs

@@ -140,7 +140,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
         range: Option<Range<u32>>,
     ) -> B
     where
-        Func: FnMut(B, D::Item<'w>) -> B,
+        Func: FnMut(B, D::Item<'w, 's>) -> B,
     {
         if self.cursor.is_dense {
             // SAFETY: `self.cursor.is_dense` is true, so storage ids are guaranteed to be table ids.
@@ -203,7 +203,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
         rows: Range<u32>,
     ) -> B
     where
-        Func: FnMut(B, D::Item<'w>) -> B,
+        Func: FnMut(B, D::Item<'w, 's>) -> B,
     {
         if table.is_empty() {
             return accum;
@@ -225,14 +225,26 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
 
             // SAFETY: set_table was called prior.
             // Caller assures `row` in range of the current archetype.
-            let fetched = unsafe { !F::filter_fetch(&mut self.cursor.filter, *entity, row) };
+            let fetched = unsafe {
+                !F::filter_fetch(
+                    &self.query_state.filter_state,
+                    &mut self.cursor.filter,
+                    *entity,
+                    row,
+                )
+            };
             if fetched {
                 continue;
             }
 
             // SAFETY: set_table was called prior.
             // Caller assures `row` in range of the current archetype.
-            let item = D::fetch(&mut self.cursor.fetch, *entity, row);
+            let item = D::fetch(
+                &self.query_state.fetch_state,
+                &mut self.cursor.fetch,
+                *entity,
+                row,
+            );
 
             accum = func(accum, item);
         }
@@ -255,7 +267,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
         indices: Range<u32>,
     ) -> B
     where
-        Func: FnMut(B, D::Item<'w>) -> B,
+        Func: FnMut(B, D::Item<'w, 's>) -> B,
     {
         if archetype.is_empty() {
             return accum;
@@ -283,6 +295,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
             // Caller assures `index` in range of the current archetype.
             let fetched = unsafe {
                 !F::filter_fetch(
+                    &self.query_state.filter_state,
                     &mut self.cursor.filter,
                     archetype_entity.id(),
                     archetype_entity.table_row(),
@@ -296,6 +309,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
             // Caller assures `index` in range of the current archetype.
             let item = unsafe {
                 D::fetch(
+                    &self.query_state.fetch_state,
                     &mut self.cursor.fetch,
                     archetype_entity.id(),
                     archetype_entity.table_row(),
@@ -324,7 +338,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
         rows: Range<u32>,
     ) -> B
     where
-        Func: FnMut(B, D::Item<'w>) -> B,
+        Func: FnMut(B, D::Item<'w, 's>) -> B,
     {
         if archetype.is_empty() {
             return accum;
@@ -356,14 +370,26 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
 
             // SAFETY: set_table was called prior.
             // Caller assures `row` in range of the current archetype.
-            let filter_matched = unsafe { F::filter_fetch(&mut self.cursor.filter, entity, row) };
+            let filter_matched = unsafe {
+                F::filter_fetch(
+                    &self.query_state.filter_state,
+                    &mut self.cursor.filter,
+                    entity,
+                    row,
+                )
+            };
             if !filter_matched {
                 continue;
             }
 
             // SAFETY: set_table was called prior.
             // Caller assures `row` in range of the current archetype.
-            let item = D::fetch(&mut self.cursor.fetch, entity, row);
+            let item = D::fetch(
+                &self.query_state.fetch_state,
+                &mut self.cursor.fetch,
+                entity,
+                row,
+            );
 
             accum = func(accum, item);
         }
@@ -492,7 +518,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
         impl ExactSizeIterator<Item = Entity> + DoubleEndedIterator + FusedIterator + 'w,
     >
     where
-        for<'lw> L::Item<'lw>: Ord,
+        for<'lw, 'ls> L::Item<'lw, 'ls>: Ord,
     {
         self.sort_impl::<L>(|keyed_query| keyed_query.sort())
     }
@@ -549,7 +575,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
         impl ExactSizeIterator<Item = Entity> + DoubleEndedIterator + FusedIterator + 'w,
     >
     where
-        for<'lw> L::Item<'lw>: Ord,
+        for<'lw, 'ls> L::Item<'lw, 'ls>: Ord,
     {
         self.sort_impl::<L>(|keyed_query| keyed_query.sort_unstable())
     }
@@ -605,7 +631,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
     /// ```
     pub fn sort_by<L: ReadOnlyQueryData + 'w>(
         self,
-        mut compare: impl FnMut(&L::Item<'_>, &L::Item<'_>) -> Ordering,
+        mut compare: impl FnMut(&L::Item<'_, '_>, &L::Item<'_, '_>) -> Ordering,
     ) -> QuerySortedIter<
         'w,
         's,
@@ -637,7 +663,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
     /// This will panic if `next` has been called on `QueryIter` before, unless the underlying `Query` is empty.
     pub fn sort_unstable_by<L: ReadOnlyQueryData + 'w>(
         self,
-        mut compare: impl FnMut(&L::Item<'_>, &L::Item<'_>) -> Ordering,
+        mut compare: impl FnMut(&L::Item<'_, '_>, &L::Item<'_, '_>) -> Ordering,
     ) -> QuerySortedIter<
         'w,
         's,
@@ -729,7 +755,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
     /// ```
     pub fn sort_by_key<L: ReadOnlyQueryData + 'w, K>(
         self,
-        mut f: impl FnMut(&L::Item<'_>) -> K,
+        mut f: impl FnMut(&L::Item<'_, '_>) -> K,
     ) -> QuerySortedIter<
         'w,
         's,
@@ -762,7 +788,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
     /// This will panic if `next` has been called on `QueryIter` before, unless the underlying `Query` is empty.
     pub fn sort_unstable_by_key<L: ReadOnlyQueryData + 'w, K>(
         self,
-        mut f: impl FnMut(&L::Item<'_>) -> K,
+        mut f: impl FnMut(&L::Item<'_, '_>) -> K,
     ) -> QuerySortedIter<
         'w,
         's,
@@ -797,7 +823,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
     /// This will panic if `next` has been called on `QueryIter` before, unless the underlying `Query` is empty.
     pub fn sort_by_cached_key<L: ReadOnlyQueryData + 'w, K>(
         self,
-        mut f: impl FnMut(&L::Item<'_>) -> K,
+        mut f: impl FnMut(&L::Item<'_, '_>) -> K,
     ) -> QuerySortedIter<
         'w,
         's,
@@ -827,7 +853,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
     /// This will panic if `next` has been called on `QueryIter` before, unless the underlying `Query` is empty.
     fn sort_impl<L: ReadOnlyQueryData + 'w>(
         self,
-        f: impl FnOnce(&mut Vec<(L::Item<'_>, NeutralOrd<Entity>)>),
+        f: impl FnOnce(&mut Vec<(L::Item<'_, '_>, NeutralOrd<Entity>)>),
     ) -> QuerySortedIter<
         'w,
         's,
@@ -856,7 +882,11 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
             .map(|(key, entity)| (key, NeutralOrd(entity)))
             .collect();
         f(&mut keyed_query);
-        let entity_iter = keyed_query.into_iter().map(|(.., entity)| entity.0);
+        let entity_iter = keyed_query
+            .into_iter()
+            .map(|(.., entity)| entity.0)
+            .collect::<Vec<_>>()
+            .into_iter();
         // SAFETY:
         // `self.world` has permission to access the required components.
         // Each lens query item is dropped before the respective actual query item is accessed.
@@ -873,7 +903,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIter<'w, 's, D, F> {
 }
 
 impl<'w, 's, D: QueryData, F: QueryFilter> Iterator for QueryIter<'w, 's, D, F> {
-    type Item = D::Item<'w>;
+    type Item = D::Item<'w, 's>;
 
     #[inline(always)]
     fn next(&mut self) -> Option<Self::Item> {
@@ -1010,7 +1040,7 @@ where
     /// # Safety
     /// `entity` must stem from `self.entity_iter`, and not have been passed before.
     #[inline(always)]
-    unsafe fn fetch_next(&mut self, entity: Entity) -> D::Item<'w> {
+    unsafe fn fetch_next(&mut self, entity: Entity) -> D::Item<'w, 's> {
         let (location, archetype, table);
         // SAFETY:
         // `tables` and `archetypes` belong to the same world that the [`QueryIter`]
@@ -1039,7 +1069,14 @@ where
         // SAFETY:
         // - set_archetype was called prior, `location.archetype_row` is an archetype index in range of the current archetype
         // - fetch is only called once for each entity.
-        unsafe { D::fetch(&mut self.fetch, entity, location.table_row) }
+        unsafe {
+            D::fetch(
+                &self.query_state.fetch_state,
+                &mut self.fetch,
+                entity,
+                location.table_row,
+            )
+        }
     }
 }
 
@@ -1048,7 +1085,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator> Iterator
 where
     I: Iterator<Item = Entity>,
 {
-    type Item = D::Item<'w>;
+    type Item = D::Item<'w, 's>;
 
     #[inline(always)]
     fn next(&mut self) -> Option<Self::Item> {
@@ -1170,7 +1207,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
         fetch: &mut D::Fetch<'w>,
         filter: &mut F::Fetch<'w>,
         query_state: &'s QueryState<D, F>,
-    ) -> Option<D::Item<'w>> {
+    ) -> Option<D::Item<'w, 's>> {
         for entity_borrow in entity_iter {
             let entity = entity_borrow.entity();
             let Ok(location) = entities.get_constructed(entity) else {
@@ -1200,11 +1237,20 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
 
             // SAFETY: set_archetype was called prior.
             // `location.archetype_row` is an archetype index row in range of the current archetype, because if it was not, the match above would have `continue`d
-            if unsafe { F::filter_fetch(filter, entity, location.table_row) } {
+            if unsafe {
+                F::filter_fetch(
+                    &query_state.filter_state,
+                    filter,
+                    entity,
+                    location.table_row,
+                )
+            } {
                 // SAFETY:
                 // - set_archetype was called prior, `location.archetype_row` is an archetype index in range of the current archetype
                 // - fetch is only called once for each entity.
-                return Some(unsafe { D::fetch(fetch, entity, location.table_row) });
+                return Some(unsafe {
+                    D::fetch(&query_state.fetch_state, fetch, entity, location.table_row)
+                });
             }
         }
         None
@@ -1212,7 +1258,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
 
     /// Get next result from the query
     #[inline(always)]
-    pub fn fetch_next(&mut self) -> Option<D::Item<'_>> {
+    pub fn fetch_next(&mut self) -> Option<D::Item<'_, 's>> {
         // SAFETY:
         // All arguments stem from self.
         // We are limiting the returned reference to self,
@@ -1336,7 +1382,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
         impl ExactSizeIterator<Item = Entity> + DoubleEndedIterator + FusedIterator + 'w,
     >
     where
-        for<'lw> L::Item<'lw>: Ord,
+        for<'lw, 'ls> L::Item<'lw, 'ls>: Ord,
     {
         self.sort_impl::<L>(|keyed_query| keyed_query.sort())
     }
@@ -1394,7 +1440,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
         impl ExactSizeIterator<Item = Entity> + DoubleEndedIterator + FusedIterator + 'w,
     >
     where
-        for<'lw> L::Item<'lw>: Ord,
+        for<'lw, 'ls> L::Item<'lw, 'ls>: Ord,
     {
         self.sort_impl::<L>(|keyed_query| keyed_query.sort_unstable())
     }
@@ -1451,7 +1497,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
     /// ```
     pub fn sort_by<L: ReadOnlyQueryData + 'w>(
         self,
-        mut compare: impl FnMut(&L::Item<'_>, &L::Item<'_>) -> Ordering,
+        mut compare: impl FnMut(&L::Item<'_, '_>, &L::Item<'_, '_>) -> Ordering,
     ) -> QuerySortedManyIter<
         'w,
         's,
@@ -1482,7 +1528,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
     /// called on [`QueryManyIter`] before.
     pub fn sort_unstable_by<L: ReadOnlyQueryData + 'w>(
         self,
-        mut compare: impl FnMut(&L::Item<'_>, &L::Item<'_>) -> Ordering,
+        mut compare: impl FnMut(&L::Item<'_, '_>, &L::Item<'_, '_>) -> Ordering,
     ) -> QuerySortedManyIter<
         'w,
         's,
@@ -1576,7 +1622,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
     /// ```
     pub fn sort_by_key<L: ReadOnlyQueryData + 'w, K>(
         self,
-        mut f: impl FnMut(&L::Item<'_>) -> K,
+        mut f: impl FnMut(&L::Item<'_, '_>) -> K,
     ) -> QuerySortedManyIter<
         'w,
         's,
@@ -1608,7 +1654,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
     /// called on [`QueryManyIter`] before.
     pub fn sort_unstable_by_key<L: ReadOnlyQueryData + 'w, K>(
         self,
-        mut f: impl FnMut(&L::Item<'_>) -> K,
+        mut f: impl FnMut(&L::Item<'_, '_>) -> K,
     ) -> QuerySortedManyIter<
         'w,
         's,
@@ -1642,7 +1688,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
     /// called on [`QueryManyIter`] before.
     pub fn sort_by_cached_key<L: ReadOnlyQueryData + 'w, K>(
         self,
-        mut f: impl FnMut(&L::Item<'_>) -> K,
+        mut f: impl FnMut(&L::Item<'_, '_>) -> K,
     ) -> QuerySortedManyIter<
         'w,
         's,
@@ -1671,7 +1717,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>>
     /// called on [`QueryManyIter`] before.
     fn sort_impl<L: ReadOnlyQueryData + 'w>(
         self,
-        f: impl FnOnce(&mut Vec<(L::Item<'_>, NeutralOrd<Entity>)>),
+        f: impl FnOnce(&mut Vec<(L::Item<'_, '_>, NeutralOrd<Entity>)>),
     ) -> QuerySortedManyIter<
         'w,
         's,
@@ -1721,7 +1767,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: DoubleEndedIterator<Item: EntityEq
 {
     /// Get next result from the back of the query
     #[inline(always)]
-    pub fn fetch_next_back(&mut self) -> Option<D::Item<'_>> {
+    pub fn fetch_next_back(&mut self) -> Option<D::Item<'_, 's>> {
         // SAFETY:
         // All arguments stem from self.
         // We are limiting the returned reference to self,
@@ -1745,7 +1791,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: DoubleEndedIterator<Item: EntityEq
 impl<'w, 's, D: ReadOnlyQueryData, F: QueryFilter, I: Iterator<Item: EntityEquivalent>> Iterator
     for QueryManyIter<'w, 's, D, F, I>
 {
-    type Item = D::Item<'w>;
+    type Item = D::Item<'w, 's>;
 
     #[inline(always)]
     fn next(&mut self) -> Option<Self::Item> {
@@ -1861,7 +1907,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: EntitySetIterator>
 impl<'w, 's, D: QueryData, F: QueryFilter, I: EntitySetIterator> Iterator
     for QueryManyUniqueIter<'w, 's, D, F, I>
 {
-    type Item = D::Item<'w>;
+    type Item = D::Item<'w, 's>;
 
     #[inline(always)]
     fn next(&mut self) -> Option<Self::Item> {
@@ -1954,7 +2000,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item = Entity>>
     /// It is always safe for shared access.
     /// `entity` must stem from `self.entity_iter`, and not have been passed before.
     #[inline(always)]
-    unsafe fn fetch_next_aliased_unchecked(&mut self, entity: Entity) -> D::Item<'w> {
+    unsafe fn fetch_next_aliased_unchecked(&mut self, entity: Entity) -> D::Item<'w, 's> {
         let (location, archetype, table);
         // SAFETY:
         // `tables` and `archetypes` belong to the same world that the [`QueryIter`]
@@ -1983,12 +2029,19 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: Iterator<Item = Entity>>
         // SAFETY:
         // - set_archetype was called prior, `location.archetype_row` is an archetype index in range of the current archetype
         // - fetch is only called once for each entity.
-        unsafe { D::fetch(&mut self.fetch, entity, location.table_row) }
+        unsafe {
+            D::fetch(
+                &self.query_state.fetch_state,
+                &mut self.fetch,
+                entity,
+                location.table_row,
+            )
+        }
     }
 
     /// Get next result from the query
     #[inline(always)]
-    pub fn fetch_next(&mut self) -> Option<D::Item<'_>> {
+    pub fn fetch_next(&mut self) -> Option<D::Item<'_, 's>> {
         let entity = self.entity_iter.next()?;
 
         // SAFETY:
@@ -2007,7 +2060,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: DoubleEndedIterator<Item = Entity>
 {
     /// Get next result from the query
     #[inline(always)]
-    pub fn fetch_next_back(&mut self) -> Option<D::Item<'_>> {
+    pub fn fetch_next_back(&mut self) -> Option<D::Item<'_, 's>> {
         let entity = self.entity_iter.next_back()?;
 
         // SAFETY:
@@ -2024,7 +2077,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, I: DoubleEndedIterator<Item = Entity>
 impl<'w, 's, D: ReadOnlyQueryData, F: QueryFilter, I: Iterator<Item = Entity>> Iterator
     for QuerySortedManyIter<'w, 's, D, F, I>
 {
-    type Item = D::Item<'w>;
+    type Item = D::Item<'w, 's>;
 
     #[inline(always)]
     fn next(&mut self) -> Option<Self::Item> {
@@ -2185,7 +2238,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, const K: usize> QueryCombinationIter<
     /// .
     /// It is always safe for shared access.
     #[inline]
-    unsafe fn fetch_next_aliased_unchecked(&mut self) -> Option<[D::Item<'w>; K]> {
+    unsafe fn fetch_next_aliased_unchecked(&mut self) -> Option<[D::Item<'w, 's>; K]> {
         // PERF: can speed up the following code using `cursor.remaining()` instead of `next_item.is_none()`
         // when D::IS_ARCHETYPAL && F::IS_ARCHETYPAL
         //
@@ -2211,11 +2264,12 @@ impl<'w, 's, D: QueryData, F: QueryFilter, const K: usize> QueryCombinationIter<
             }
         }
 
-        let mut values = MaybeUninit::<[D::Item<'w>; K]>::uninit();
+        let mut values = MaybeUninit::<[D::Item<'w, 's>; K]>::uninit();
 
-        let ptr = values.as_mut_ptr().cast::<D::Item<'w>>();
+        let ptr = values.as_mut_ptr().cast::<D::Item<'w, 's>>();
         for (offset, cursor) in self.cursors.iter_mut().enumerate() {
-            ptr.add(offset).write(cursor.peek_last().unwrap());
+            ptr.add(offset)
+                .write(cursor.peek_last(self.query_state).unwrap());
         }
 
         Some(values.assume_init())
@@ -2223,7 +2277,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, const K: usize> QueryCombinationIter<
 
     /// Get next combination of queried components
     #[inline]
-    pub fn fetch_next(&mut self) -> Option<[D::Item<'_>; K]> {
+    pub fn fetch_next(&mut self) -> Option<[D::Item<'_, 's>; K]> {
         // SAFETY: we are limiting the returned reference to self,
         // making sure this method cannot be called multiple times without getting rid
         // of any previously returned unique references first, thus preventing aliasing.
@@ -2240,7 +2294,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, const K: usize> QueryCombinationIter<
 impl<'w, 's, D: ReadOnlyQueryData, F: QueryFilter, const K: usize> Iterator
     for QueryCombinationIter<'w, 's, D, F, K>
 {
-    type Item = [D::Item<'w>; K];
+    type Item = [D::Item<'w, 's>; K];
 
     #[inline]
     fn next(&mut self) -> Option<Self::Item> {
@@ -2390,7 +2444,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
     /// The result of `next` and any previous calls to `peek_last` with this row must have been
     /// dropped to prevent aliasing mutable references.
     #[inline]
-    unsafe fn peek_last(&mut self) -> Option<D::Item<'w>> {
+    unsafe fn peek_last(&mut self, query_state: &'s QueryState<D, F>) -> Option<D::Item<'w, 's>> {
         if self.current_row > 0 {
             let index = self.current_row - 1;
             if self.is_dense {
@@ -2401,6 +2455,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
                 //  - `*entity` and `index` are in the current table.
                 unsafe {
                     Some(D::fetch(
+                        &query_state.fetch_state,
                         &mut self.fetch,
                         *entity,
                         // SAFETY: This is from an exclusive range, so it can't be max.
@@ -2416,6 +2471,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
                 //  - `archetype_entity.id()` and `archetype_entity.table_row()` are in the current archetype.
                 unsafe {
                     Some(D::fetch(
+                        &query_state.fetch_state,
                         &mut self.fetch,
                         archetype_entity.id(),
                         archetype_entity.table_row(),
@@ -2457,7 +2513,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
         tables: &'w Tables,
         archetypes: &'w Archetypes,
         query_state: &'s QueryState<D, F>,
-    ) -> Option<D::Item<'w>> {
+    ) -> Option<D::Item<'w, 's>> {
         if self.is_dense {
             loop {
                 // we are on the beginning of the query, or finished processing a table, so skip to the next
@@ -2484,7 +2540,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
                     unsafe { self.table_entities.get_unchecked(self.current_row as usize) };
                 // SAFETY: The row is less than the u32 len, so it must not be max.
                 let row = unsafe { TableRow::new(NonMaxU32::new_unchecked(self.current_row)) };
-                if !F::filter_fetch(&mut self.filter, *entity, row) {
+                if !F::filter_fetch(&query_state.filter_state, &mut self.filter, *entity, row) {
                     self.current_row += 1;
                     continue;
                 }
@@ -2494,7 +2550,8 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
                 // - `current_row` must be a table row in range of the current table,
                 //   because if it was not, then the above would have been executed.
                 // - fetch is only called once for each `entity`.
-                let item = unsafe { D::fetch(&mut self.fetch, *entity, row) };
+                let item =
+                    unsafe { D::fetch(&query_state.fetch_state, &mut self.fetch, *entity, row) };
 
                 self.current_row += 1;
                 return Some(item);
@@ -2536,6 +2593,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
                         .get_unchecked(self.current_row as usize)
                 };
                 if !F::filter_fetch(
+                    &query_state.filter_state,
                     &mut self.filter,
                     archetype_entity.id(),
                     archetype_entity.table_row(),
@@ -2551,6 +2609,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryIterationCursor<'w, 's, D, F> {
                 // - fetch is only called once for each `archetype_entity`.
                 let item = unsafe {
                     D::fetch(
+                        &query_state.fetch_state,
                         &mut self.fetch,
                         archetype_entity.id(),
                         archetype_entity.table_row(),

crates/bevy_ecs/src/query/mod.rs

@@ -824,9 +824,9 @@ mod tests {
 
         fn shrink_fetch<'wlong: 'wshort, 'wshort>(_: Self::Fetch<'wlong>) -> Self::Fetch<'wshort> {}
 
-        unsafe fn init_fetch<'w>(
+        unsafe fn init_fetch<'w, 's>(
             _world: UnsafeWorldCell<'w>,
-            _state: &Self::State,
+            _state: &'s Self::State,
             _last_run: Tick,
             _this_run: Tick,
         ) -> Self::Fetch<'w> {
@@ -835,18 +835,18 @@ mod tests {
         const IS_DENSE: bool = true;
 
         #[inline]
-        unsafe fn set_archetype<'w>(
+        unsafe fn set_archetype<'w, 's>(
             _fetch: &mut Self::Fetch<'w>,
-            _state: &Self::State,
+            _state: &'s Self::State,
             _archetype: &'w Archetype,
             _table: &Table,
         ) {
         }
 
         #[inline]
-        unsafe fn set_table<'w>(
+        unsafe fn set_table<'w, 's>(
             _fetch: &mut Self::Fetch<'w>,
-            _state: &Self::State,
+            _state: &'s Self::State,
             _table: &'w Table,
         ) {
         }
@@ -882,16 +882,20 @@ mod tests {
     unsafe impl QueryData for ReadsRData {
         const IS_READ_ONLY: bool = true;
         type ReadOnly = Self;
-        type Item<'w> = ();
+        type Item<'w, 's> = ();
 
-        fn shrink<'wlong: 'wshort, 'wshort>(_item: Self::Item<'wlong>) -> Self::Item<'wshort> {}
+        fn shrink<'wlong: 'wshort, 'wshort, 's>(
+            _item: Self::Item<'wlong, 's>,
+        ) -> Self::Item<'wshort, 's> {
+        }
 
         #[inline(always)]
-        unsafe fn fetch<'w>(
+        unsafe fn fetch<'w, 's>(
+            _state: &'s Self::State,
             _fetch: &mut Self::Fetch<'w>,
             _entity: Entity,
             _table_row: TableRow,
-        ) -> Self::Item<'w> {
+        ) -> Self::Item<'w, 's> {
         }
     }
 

crates/bevy_ecs/src/query/par_iter.rs

@@ -39,7 +39,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryParIter<'w, 's, D, F> {
     ///
     /// [`ComputeTaskPool`]: bevy_tasks::ComputeTaskPool
     #[inline]
-    pub fn for_each<FN: Fn(QueryItem<'w, D>) + Send + Sync + Clone>(self, func: FN) {
+    pub fn for_each<FN: Fn(QueryItem<'w, 's, D>) + Send + Sync + Clone>(self, func: FN) {
         self.for_each_init(|| {}, |_, item| func(item));
     }
 
@@ -76,7 +76,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> QueryParIter<'w, 's, D, F> {
     #[inline]
     pub fn for_each_init<FN, INIT, T>(self, init: INIT, func: FN)
     where
-        FN: Fn(&mut T, QueryItem<'w, D>) + Send + Sync + Clone,
+        FN: Fn(&mut T, QueryItem<'w, 's, D>) + Send + Sync + Clone,
         INIT: Fn() -> T + Sync + Send + Clone,
     {
         let func = |mut init, item| {
@@ -190,7 +190,7 @@ impl<'w, 's, D: ReadOnlyQueryData, F: QueryFilter, E: EntityEquivalent + Sync>
     ///
     /// [`ComputeTaskPool`]: bevy_tasks::ComputeTaskPool
     #[inline]
-    pub fn for_each<FN: Fn(QueryItem<'w, D>) + Send + Sync + Clone>(self, func: FN) {
+    pub fn for_each<FN: Fn(QueryItem<'w, 's, D>) + Send + Sync + Clone>(self, func: FN) {
         self.for_each_init(|| {}, |_, item| func(item));
     }
 
@@ -247,7 +247,7 @@ impl<'w, 's, D: ReadOnlyQueryData, F: QueryFilter, E: EntityEquivalent + Sync>
     #[inline]
     pub fn for_each_init<FN, INIT, T>(self, init: INIT, func: FN)
     where
-        FN: Fn(&mut T, QueryItem<'w, D>) + Send + Sync + Clone,
+        FN: Fn(&mut T, QueryItem<'w, 's, D>) + Send + Sync + Clone,
         INIT: Fn() -> T + Sync + Send + Clone,
     {
         let func = |mut init, item| {
@@ -345,7 +345,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, E: EntityEquivalent + Sync>
     ///
     /// [`ComputeTaskPool`]: bevy_tasks::ComputeTaskPool
     #[inline]
-    pub fn for_each<FN: Fn(QueryItem<'w, D>) + Send + Sync + Clone>(self, func: FN) {
+    pub fn for_each<FN: Fn(QueryItem<'w, 's, D>) + Send + Sync + Clone>(self, func: FN) {
         self.for_each_init(|| {}, |_, item| func(item));
     }
 
@@ -402,7 +402,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter, E: EntityEquivalent + Sync>
     #[inline]
     pub fn for_each_init<FN, INIT, T>(self, init: INIT, func: FN)
     where
-        FN: Fn(&mut T, QueryItem<'w, D>) + Send + Sync + Clone,
+        FN: Fn(&mut T, QueryItem<'w, 's, D>) + Send + Sync + Clone,
         INIT: Fn() -> T + Sync + Send + Clone,
     {
         let func = |mut init, item| {

crates/bevy_ecs/src/query/state.rs

@@ -14,6 +14,7 @@ use crate::{
 use crate::entity::UniqueEntityEquivalentSlice;
 
 use alloc::vec::Vec;
+use bevy_utils::prelude::DebugName;
 use core::{fmt, ptr};
 use fixedbitset::FixedBitSet;
 use log::warn;
@@ -672,7 +673,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         assert!(
             component_access.is_subset(&self_access),
             "Transmuted state for {} attempts to access terms that are not allowed by original state {}.",
-            core::any::type_name::<(NewD, NewF)>(), core::any::type_name::<(D, F)>()
+            DebugName::type_name::<(NewD, NewF)>(), DebugName::type_name::<(D, F)>()
         );
 
         QueryState {
@@ -791,7 +792,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         assert!(
             component_access.is_subset(&joined_component_access),
             "Joined state for {} attempts to access terms that are not allowed by state {} joined with {}.",
-            core::any::type_name::<(NewD, NewF)>(), core::any::type_name::<(D, F)>(), core::any::type_name::<(OtherD, OtherF)>()
+            DebugName::type_name::<(NewD, NewF)>(), DebugName::type_name::<(D, F)>(), DebugName::type_name::<(OtherD, OtherF)>()
         );
 
         if self.archetype_generation != other.archetype_generation {
@@ -845,13 +846,17 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
     ///
     /// This can only be called for read-only queries, see [`Self::get_mut`] for write-queries.
     ///
+    /// If you need to get multiple items at once but get borrowing errors,
+    /// consider using [`Self::update_archetypes`] followed by multiple [`Self::get_manual`] calls,
+    /// or making a single call with [`Self::get_many`]  or [`Self::iter_many`].
+    ///
     /// This is always guaranteed to run in `O(1)` time.
     #[inline]
     pub fn get<'w>(
         &mut self,
         world: &'w World,
         entity: Entity,
-    ) -> Result<ROQueryItem<'w, D>, QueryEntityError> {
+    ) -> Result<ROQueryItem<'w, '_, D>, QueryEntityError> {
         self.query(world).get_inner(entity)
     }
 
@@ -892,7 +897,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         &mut self,
         world: &'w World,
         entities: [Entity; N],
-    ) -> Result<[ROQueryItem<'w, D>; N], QueryEntityError> {
+    ) -> Result<[ROQueryItem<'w, '_, D>; N], QueryEntityError> {
         self.query(world).get_many_inner(entities)
     }
 
@@ -930,7 +935,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         &mut self,
         world: &'w World,
         entities: UniqueEntityArray<N>,
-    ) -> Result<[ROQueryItem<'w, D>; N], QueryEntityError> {
+    ) -> Result<[ROQueryItem<'w, '_, D>; N], QueryEntityError> {
         self.query(world).get_many_unique_inner(entities)
     }
 
@@ -942,7 +947,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         &mut self,
         world: &'w mut World,
         entity: Entity,
-    ) -> Result<D::Item<'w>, QueryEntityError> {
+    ) -> Result<D::Item<'w, '_>, QueryEntityError> {
         self.query_mut(world).get_inner(entity)
     }
 
@@ -989,7 +994,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         &mut self,
         world: &'w mut World,
         entities: [Entity; N],
-    ) -> Result<[D::Item<'w>; N], QueryEntityError> {
+    ) -> Result<[D::Item<'w, '_>; N], QueryEntityError> {
         self.query_mut(world).get_many_mut_inner(entities)
     }
 
@@ -1034,7 +1039,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         &mut self,
         world: &'w mut World,
         entities: UniqueEntityArray<N>,
-    ) -> Result<[D::Item<'w>; N], QueryEntityError> {
+    ) -> Result<[D::Item<'w, '_>; N], QueryEntityError> {
         self.query_mut(world).get_many_unique_inner(entities)
     }
 
@@ -1056,7 +1061,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         &self,
         world: &'w World,
         entity: Entity,
-    ) -> Result<ROQueryItem<'w, D>, QueryEntityError> {
+    ) -> Result<ROQueryItem<'w, '_, D>, QueryEntityError> {
         self.query_manual(world).get_inner(entity)
     }
 
@@ -1073,13 +1078,16 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         &mut self,
         world: UnsafeWorldCell<'w>,
         entity: Entity,
-    ) -> Result<D::Item<'w>, QueryEntityError> {
+    ) -> Result<D::Item<'w, '_>, QueryEntityError> {
         self.query_unchecked(world).get_inner(entity)
     }
 
     /// Returns an [`Iterator`] over the query results for the given [`World`].
     ///
     /// This can only be called for read-only queries, see [`Self::iter_mut`] for write-queries.
+    ///
+    /// If you need to iterate multiple times at once but get borrowing errors,
+    /// consider using [`Self::update_archetypes`] followed by multiple [`Self::iter_manual`] calls.
     #[inline]
     pub fn iter<'w, 's>(&'s mut self, world: &'w World) -> QueryIter<'w, 's, D::ReadOnly, F> {
         self.query(world).into_iter()
@@ -1168,6 +1176,9 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
     /// Items are returned in the order of the list of entities.
     /// Entities that don't match the query are skipped.
     ///
+    /// If you need to iterate multiple times at once but get borrowing errors,
+    /// consider using [`Self::update_archetypes`] followed by multiple [`Self::iter_many_manual`] calls.
+    ///
     /// # See also
     ///
     /// - [`iter_many_mut`](Self::iter_many_mut) to get mutable query items.
@@ -1387,8 +1398,8 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
     ///
     /// [`ComputeTaskPool`]: bevy_tasks::ComputeTaskPool
     #[cfg(all(not(target_arch = "wasm32"), feature = "multi_threaded"))]
-    pub(crate) unsafe fn par_fold_init_unchecked_manual<'w, T, FN, INIT>(
+    pub(crate) unsafe fn par_fold_init_unchecked_manual<'w, 's, T, FN, INIT>(
-        &self,
+        &'s self,
         init_accum: INIT,
         world: UnsafeWorldCell<'w>,
         batch_size: u32,
@@ -1396,7 +1407,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         last_run: Tick,
         this_run: Tick,
     ) where
-        FN: Fn(T, D::Item<'w>) -> T + Send + Sync + Clone,
+        FN: Fn(T, D::Item<'w, 's>) -> T + Send + Sync + Clone,
         INIT: Fn() -> T + Sync + Send + Clone,
     {
         // NOTE: If you are changing query iteration code, remember to update the following places, where relevant:
@@ -1501,8 +1512,8 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
     ///
     /// [`ComputeTaskPool`]: bevy_tasks::ComputeTaskPool
     #[cfg(all(not(target_arch = "wasm32"), feature = "multi_threaded"))]
-    pub(crate) unsafe fn par_many_unique_fold_init_unchecked_manual<'w, T, FN, INIT, E>(
+    pub(crate) unsafe fn par_many_unique_fold_init_unchecked_manual<'w, 's, T, FN, INIT, E>(
-        &self,
+        &'s self,
         init_accum: INIT,
         world: UnsafeWorldCell<'w>,
         entity_list: &UniqueEntityEquivalentSlice<E>,
@@ -1511,7 +1522,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         last_run: Tick,
         this_run: Tick,
     ) where
-        FN: Fn(T, D::Item<'w>) -> T + Send + Sync + Clone,
+        FN: Fn(T, D::Item<'w, 's>) -> T + Send + Sync + Clone,
         INIT: Fn() -> T + Sync + Send + Clone,
         E: EntityEquivalent + Sync,
     {
@@ -1564,8 +1575,8 @@ impl<D: ReadOnlyQueryData, F: QueryFilter> QueryState<D, F> {
     ///
     /// [`ComputeTaskPool`]: bevy_tasks::ComputeTaskPool
     #[cfg(all(not(target_arch = "wasm32"), feature = "multi_threaded"))]
-    pub(crate) unsafe fn par_many_fold_init_unchecked_manual<'w, T, FN, INIT, E>(
+    pub(crate) unsafe fn par_many_fold_init_unchecked_manual<'w, 's, T, FN, INIT, E>(
-        &self,
+        &'s self,
         init_accum: INIT,
         world: UnsafeWorldCell<'w>,
         entity_list: &[E],
@@ -1574,7 +1585,7 @@ impl<D: ReadOnlyQueryData, F: QueryFilter> QueryState<D, F> {
         last_run: Tick,
         this_run: Tick,
     ) where
-        FN: Fn(T, D::Item<'w>) -> T + Send + Sync + Clone,
+        FN: Fn(T, D::Item<'w, 's>) -> T + Send + Sync + Clone,
         INIT: Fn() -> T + Sync + Send + Clone,
         E: EntityEquivalent + Sync,
     {
@@ -1686,7 +1697,10 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
     ///
     /// Simply unwrapping the [`Result`] also works, but should generally be reserved for tests.
     #[inline]
-    pub fn single<'w>(&mut self, world: &'w World) -> Result<ROQueryItem<'w, D>, QuerySingleError> {
+    pub fn single<'w>(
+        &mut self,
+        world: &'w World,
+    ) -> Result<ROQueryItem<'w, '_, D>, QuerySingleError> {
         self.query(world).single_inner()
     }
 
@@ -1703,7 +1717,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
     pub fn single_mut<'w>(
         &mut self,
         world: &'w mut World,
-    ) -> Result<D::Item<'w>, QuerySingleError> {
+    ) -> Result<D::Item<'w, '_>, QuerySingleError> {
         self.query_mut(world).single_inner()
     }
 
@@ -1720,7 +1734,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
     pub unsafe fn single_unchecked<'w>(
         &mut self,
         world: UnsafeWorldCell<'w>,
-    ) -> Result<D::Item<'w>, QuerySingleError> {
+    ) -> Result<D::Item<'w, '_>, QuerySingleError> {
         self.query_unchecked(world).single_inner()
     }
 
@@ -1742,7 +1756,7 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         world: UnsafeWorldCell<'w>,
         last_run: Tick,
         this_run: Tick,
-    ) -> Result<D::Item<'w>, QuerySingleError> {
+    ) -> Result<D::Item<'w, '_>, QuerySingleError> {
         // SAFETY:
         // - The caller ensured we have the correct access to the world.
         // - The caller ensured that the world matches.

crates/bevy_ecs/src/query/world_query.rs

@@ -42,7 +42,7 @@ use variadics_please::all_tuples;
 /// [`QueryFilter`]: crate::query::QueryFilter
 pub unsafe trait WorldQuery {
     /// Per archetype/table state retrieved by this [`WorldQuery`] to compute [`Self::Item`](crate::query::QueryData::Item) for each entity.
-    type Fetch<'a>: Clone;
+    type Fetch<'w>: Clone;
 
     /// State used to construct a [`Self::Fetch`](WorldQuery::Fetch). This will be cached inside [`QueryState`](crate::query::QueryState),
     /// so it is best to move as much data / computation here as possible to reduce the cost of
@@ -62,9 +62,9 @@ pub unsafe trait WorldQuery {
     ///   in to this function.
     /// - `world` must have the **right** to access any access registered in `update_component_access`.
     /// - There must not be simultaneous resource access conflicting with readonly resource access registered in [`WorldQuery::update_component_access`].
-    unsafe fn init_fetch<'w>(
+    unsafe fn init_fetch<'w, 's>(
         world: UnsafeWorldCell<'w>,
-        state: &Self::State,
+        state: &'s Self::State,
         last_run: Tick,
         this_run: Tick,
     ) -> Self::Fetch<'w>;
@@ -87,9 +87,9 @@ pub unsafe trait WorldQuery {
     /// - `archetype` and `tables` must be from the same [`World`] that [`WorldQuery::init_state`] was called on.
     /// - `table` must correspond to `archetype`.
     /// - `state` must be the [`State`](Self::State) that `fetch` was initialized with.
-    unsafe fn set_archetype<'w>(
+    unsafe fn set_archetype<'w, 's>(
         fetch: &mut Self::Fetch<'w>,
-        state: &Self::State,
+        state: &'s Self::State,
         archetype: &'w Archetype,
         table: &'w Table,
     );
@@ -101,7 +101,11 @@ pub unsafe trait WorldQuery {
     ///
     /// - `table` must be from the same [`World`] that [`WorldQuery::init_state`] was called on.
     /// - `state` must be the [`State`](Self::State) that `fetch` was initialized with.
-    unsafe fn set_table<'w>(fetch: &mut Self::Fetch<'w>, state: &Self::State, table: &'w Table);
+    unsafe fn set_table<'w, 's>(
+        fetch: &mut Self::Fetch<'w>,
+        state: &'s Self::State,
+        table: &'w Table,
+    );
 
     /// Adds any component accesses used by this [`WorldQuery`] to `access`.
     ///
@@ -166,7 +170,7 @@ macro_rules! impl_tuple_world_query {
             }
 
             #[inline]
-            unsafe fn init_fetch<'w>(world: UnsafeWorldCell<'w>, state: &Self::State, last_run: Tick, this_run: Tick) -> Self::Fetch<'w> {
+            unsafe fn init_fetch<'w, 's>(world: UnsafeWorldCell<'w>, state: &'s Self::State, last_run: Tick, this_run: Tick) -> Self::Fetch<'w> {
                 let ($($name,)*) = state;
                 // SAFETY: The invariants are upheld by the caller.
                 ($(unsafe { $name::init_fetch(world, $name, last_run, this_run) },)*)
@@ -175,9 +179,9 @@ macro_rules! impl_tuple_world_query {
             const IS_DENSE: bool = true $(&& $name::IS_DENSE)*;
 
             #[inline]
-            unsafe fn set_archetype<'w>(
+            unsafe fn set_archetype<'w, 's>(
                 fetch: &mut Self::Fetch<'w>,
-                state: &Self::State,
+                state: &'s Self::State,
                 archetype: &'w Archetype,
                 table: &'w Table
             ) {
@@ -188,7 +192,7 @@ macro_rules! impl_tuple_world_query {
             }
 
             #[inline]
-            unsafe fn set_table<'w>(fetch: &mut Self::Fetch<'w>, state: &Self::State, table: &'w Table) {
+            unsafe fn set_table<'w, 's>(fetch: &mut Self::Fetch<'w>, state: &'s Self::State, table: &'w Table) {
                 let ($($name,)*) = fetch;
                 let ($($state,)*) = state;
                 // SAFETY: The invariants are upheld by the caller.

crates/bevy_ecs/src/reflect/bundle.rs

@@ -5,6 +5,7 @@
 //!
 //! Same as [`super::component`], but for bundles.
 use alloc::boxed::Box;
+use bevy_utils::prelude::DebugName;
 use core::any::{Any, TypeId};
 
 use crate::{
@@ -172,7 +173,7 @@ impl<B: Bundle + Reflect + TypePath + BundleFromComponents> FromType<B> for Refl
                         _ => panic!(
                             "expected bundle `{}` to be named struct or tuple",
                             // FIXME: once we have unique reflect, use `TypePath`.
-                            core::any::type_name::<B>(),
+                            DebugName::type_name::<B>(),
                         ),
                     }
                 }
@@ -215,7 +216,7 @@ impl<B: Bundle + Reflect + TypePath + BundleFromComponents> FromType<B> for Refl
                         _ => panic!(
                             "expected bundle `{}` to be a named struct or tuple",
                             // FIXME: once we have unique reflect, use `TypePath`.
-                            core::any::type_name::<B>(),
+                            DebugName::type_name::<B>(),
                         ),
                     }
                 }

crates/bevy_ecs/src/reflect/component.rs

@@ -70,7 +70,7 @@ use crate::{
     },
 };
 use bevy_reflect::{FromReflect, FromType, PartialReflect, Reflect, TypePath, TypeRegistry};
-use disqualified::ShortName;
+use bevy_utils::prelude::DebugName;
 
 /// A struct used to operate on reflected [`Component`] trait of a type.
 ///
@@ -308,7 +308,8 @@ impl<C: Component + Reflect + TypePath> FromType<C> for ReflectComponent {
             },
             apply: |mut entity, reflected_component| {
                 if !C::Mutability::MUTABLE {
-                    let name = ShortName::of::<C>();
+                    let name = DebugName::type_name::<C>();
+                    let name = name.shortname();
                     panic!("Cannot call `ReflectComponent::apply` on component {name}. It is immutable, and cannot modified through reflection");
                 }
 
@@ -357,7 +358,8 @@ impl<C: Component + Reflect + TypePath> FromType<C> for ReflectComponent {
             reflect: |entity| entity.get::<C>().map(|c| c as &dyn Reflect),
             reflect_mut: |entity| {
                 if !C::Mutability::MUTABLE {
-                    let name = ShortName::of::<C>();
+                    let name = DebugName::type_name::<C>();
+                    let name = name.shortname();
                     panic!("Cannot call `ReflectComponent::reflect_mut` on component {name}. It is immutable, and cannot modified through reflection");
                 }
 
@@ -370,7 +372,8 @@ impl<C: Component + Reflect + TypePath> FromType<C> for ReflectComponent {
             },
             reflect_unchecked_mut: |entity| {
                 if !C::Mutability::MUTABLE {
-                    let name = ShortName::of::<C>();
+                    let name = DebugName::type_name::<C>();
+                    let name = name.shortname();
                     panic!("Cannot call `ReflectComponent::reflect_unchecked_mut` on component {name}. It is immutable, and cannot modified through reflection");
                 }
 

crates/bevy_ecs/src/reflect/mod.rs

@@ -18,6 +18,7 @@ mod from_world;
 mod map_entities;
 mod resource;
 
+use bevy_utils::prelude::DebugName;
 pub use bundle::{ReflectBundle, ReflectBundleFns};
 pub use component::{ReflectComponent, ReflectComponentFns};
 pub use entity_commands::ReflectCommandExt;
@@ -136,7 +137,7 @@ pub fn from_reflect_with_fallback<T: Reflect + TypePath>(
             `Default` or `FromWorld` traits. Are you perhaps missing a `#[reflect(Default)]` \
             or `#[reflect(FromWorld)]`?",
             // FIXME: once we have unique reflect, use `TypePath`.
-            core::any::type_name::<T>(),
+            DebugName::type_name::<T>(),
         );
     };
 

crates/bevy_ecs/src/relationship/mod.rs

@@ -6,6 +6,7 @@ mod relationship_source_collection;
 
 use alloc::format;
 
+use bevy_utils::prelude::DebugName;
 pub use related_methods::*;
 pub use relationship_query::*;
 pub use relationship_source_collection::*;
@@ -105,8 +106,8 @@ pub trait Relationship: Component + Sized {
             warn!(
                 "{}The {}({target_entity:?}) relationship on entity {entity:?} points to itself. The invalid {} relationship has been removed.",
                 caller.map(|location|format!("{location}: ")).unwrap_or_default(),
-                core::any::type_name::<Self>(),
+                DebugName::type_name::<Self>(),
-                core::any::type_name::<Self>()
+                DebugName::type_name::<Self>()
             );
             world.commands().entity(entity).remove::<Self>();
             return;
@@ -125,8 +126,8 @@ pub trait Relationship: Component + Sized {
             warn!(
                 "{}The {}({target_entity:?}) relationship on entity {entity:?} relates to an entity that does not exist. The invalid {} relationship has been removed.",
                 caller.map(|location|format!("{location}: ")).unwrap_or_default(),
-                core::any::type_name::<Self>(),
+                DebugName::type_name::<Self>(),
-                core::any::type_name::<Self>()
+                DebugName::type_name::<Self>()
             );
             world.commands().entity(entity).remove::<Self>();
         }

crates/bevy_ecs/src/relationship/relationship_query.rs

@@ -14,7 +14,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     /// target entity of that relationship.
     pub fn related<R: Relationship>(&'w self, entity: Entity) -> Option<Entity>
     where
-        <D as QueryData>::ReadOnly: QueryData<Item<'w> = &'w R>,
+        <D as QueryData>::ReadOnly: QueryData<Item<'w, 's> = &'w R>,
     {
         self.get(entity).map(R::get).ok()
     }
@@ -26,7 +26,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
         entity: Entity,
     ) -> impl Iterator<Item = Entity> + 'w
     where
-        <D as QueryData>::ReadOnly: QueryData<Item<'w> = &'w S>,
+        <D as QueryData>::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
     {
         self.get(entity)
             .into_iter()
@@ -42,7 +42,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     /// If your relationship is not a tree (like Bevy's hierarchy), be sure to stop if you encounter a duplicate entity.
     pub fn root_ancestor<R: Relationship>(&'w self, entity: Entity) -> Entity
     where
-        <D as QueryData>::ReadOnly: QueryData<Item<'w> = &'w R>,
+        <D as QueryData>::ReadOnly: QueryData<Item<'w, 's> = &'w R>,
     {
         // Recursively search up the tree until we're out of parents
         match self.get(entity) {
@@ -60,9 +60,9 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn iter_leaves<S: RelationshipTarget>(
         &'w self,
         entity: Entity,
-    ) -> impl Iterator<Item = Entity> + 'w
+    ) -> impl Iterator<Item = Entity> + use<'w, 's, S, D, F>
     where
-        <D as QueryData>::ReadOnly: QueryData<Item<'w> = &'w S>,
+        <D as QueryData>::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
         SourceIter<'w, S>: DoubleEndedIterator,
     {
         self.iter_descendants_depth_first(entity).filter(|entity| {
@@ -80,7 +80,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
         entity: Entity,
     ) -> impl Iterator<Item = Entity> + 'w
     where
-        D::ReadOnly: QueryData<Item<'w> = (Option<&'w R>, Option<&'w R::RelationshipTarget>)>,
+        D::ReadOnly: QueryData<Item<'w, 's> = (Option<&'w R>, Option<&'w R::RelationshipTarget>)>,
     {
         self.get(entity)
             .ok()
@@ -103,7 +103,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
         entity: Entity,
     ) -> DescendantIter<'w, 's, D, F, S>
     where
-        D::ReadOnly: QueryData<Item<'w> = &'w S>,
+        D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
     {
         DescendantIter::new(self, entity)
     }
@@ -120,7 +120,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
         entity: Entity,
     ) -> DescendantDepthFirstIter<'w, 's, D, F, S>
     where
-        D::ReadOnly: QueryData<Item<'w> = &'w S>,
+        D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
         SourceIter<'w, S>: DoubleEndedIterator,
     {
         DescendantDepthFirstIter::new(self, entity)
@@ -137,7 +137,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
         entity: Entity,
     ) -> AncestorIter<'w, 's, D, F, R>
     where
-        D::ReadOnly: QueryData<Item<'w> = &'w R>,
+        D::ReadOnly: QueryData<Item<'w, 's> = &'w R>,
     {
         AncestorIter::new(self, entity)
     }
@@ -148,7 +148,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
 /// Traverses the hierarchy breadth-first.
 pub struct DescendantIter<'w, 's, D: QueryData, F: QueryFilter, S: RelationshipTarget>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w S>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
 {
     children_query: &'w Query<'w, 's, D, F>,
     vecdeque: VecDeque<Entity>,
@@ -156,7 +156,7 @@ where
 
 impl<'w, 's, D: QueryData, F: QueryFilter, S: RelationshipTarget> DescendantIter<'w, 's, D, F, S>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w S>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
 {
     /// Returns a new [`DescendantIter`].
     pub fn new(children_query: &'w Query<'w, 's, D, F>, entity: Entity) -> Self {
@@ -174,7 +174,7 @@ where
 impl<'w, 's, D: QueryData, F: QueryFilter, S: RelationshipTarget> Iterator
     for DescendantIter<'w, 's, D, F, S>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w S>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
 {
     type Item = Entity;
 
@@ -194,7 +194,7 @@ where
 /// Traverses the hierarchy depth-first.
 pub struct DescendantDepthFirstIter<'w, 's, D: QueryData, F: QueryFilter, S: RelationshipTarget>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w S>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
 {
     children_query: &'w Query<'w, 's, D, F>,
     stack: SmallVec<[Entity; 8]>,
@@ -203,7 +203,7 @@ where
 impl<'w, 's, D: QueryData, F: QueryFilter, S: RelationshipTarget>
     DescendantDepthFirstIter<'w, 's, D, F, S>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w S>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
     SourceIter<'w, S>: DoubleEndedIterator,
 {
     /// Returns a new [`DescendantDepthFirstIter`].
@@ -220,7 +220,7 @@ where
 impl<'w, 's, D: QueryData, F: QueryFilter, S: RelationshipTarget> Iterator
     for DescendantDepthFirstIter<'w, 's, D, F, S>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w S>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w S>,
     SourceIter<'w, S>: DoubleEndedIterator,
 {
     type Item = Entity;
@@ -239,7 +239,7 @@ where
 /// An [`Iterator`] of [`Entity`]s over the ancestors of an [`Entity`].
 pub struct AncestorIter<'w, 's, D: QueryData, F: QueryFilter, R: Relationship>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w R>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w R>,
 {
     parent_query: &'w Query<'w, 's, D, F>,
     next: Option<Entity>,
@@ -247,7 +247,7 @@ where
 
 impl<'w, 's, D: QueryData, F: QueryFilter, R: Relationship> AncestorIter<'w, 's, D, F, R>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w R>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w R>,
 {
     /// Returns a new [`AncestorIter`].
     pub fn new(parent_query: &'w Query<'w, 's, D, F>, entity: Entity) -> Self {
@@ -261,7 +261,7 @@ where
 impl<'w, 's, D: QueryData, F: QueryFilter, R: Relationship> Iterator
     for AncestorIter<'w, 's, D, F, R>
 where
-    D::ReadOnly: QueryData<Item<'w> = &'w R>,
+    D::ReadOnly: QueryData<Item<'w, 's> = &'w R>,
 {
     type Item = Entity;
 

crates/bevy_ecs/src/schedule/condition.rs

@@ -1,4 +1,5 @@
-use alloc::{borrow::Cow, boxed::Box, format};
+use alloc::{boxed::Box, format};
+use bevy_utils::prelude::DebugName;
 use core::ops::Not;
 
 use crate::system::{
@@ -154,7 +155,7 @@ pub trait SystemCondition<Marker, In: SystemInput = (), Out = bool>:
         let a = IntoSystem::into_system(self);
         let b = IntoSystem::into_system(and);
         let name = format!("{} && {}", a.name(), b.name());
-        CombinatorSystem::new(a, b, Cow::Owned(name))
+        CombinatorSystem::new(a, b, DebugName::owned(name))
     }
 
     /// Returns a new run condition that only returns `false`
@@ -206,7 +207,7 @@ pub trait SystemCondition<Marker, In: SystemInput = (), Out = bool>:
         let a = IntoSystem::into_system(self);
         let b = IntoSystem::into_system(nand);
         let name = format!("!({} && {})", a.name(), b.name());
-        CombinatorSystem::new(a, b, Cow::Owned(name))
+        CombinatorSystem::new(a, b, DebugName::owned(name))
     }
 
     /// Returns a new run condition that only returns `true`
@@ -258,7 +259,7 @@ pub trait SystemCondition<Marker, In: SystemInput = (), Out = bool>:
         let a = IntoSystem::into_system(self);
         let b = IntoSystem::into_system(nor);
         let name = format!("!({} || {})", a.name(), b.name());
-        CombinatorSystem::new(a, b, Cow::Owned(name))
+        CombinatorSystem::new(a, b, DebugName::owned(name))
     }
 
     /// Returns a new run condition that returns `true`
@@ -305,7 +306,7 @@ pub trait SystemCondition<Marker, In: SystemInput = (), Out = bool>:
         let a = IntoSystem::into_system(self);
         let b = IntoSystem::into_system(or);
         let name = format!("{} || {}", a.name(), b.name());
-        CombinatorSystem::new(a, b, Cow::Owned(name))
+        CombinatorSystem::new(a, b, DebugName::owned(name))
     }
 
     /// Returns a new run condition that only returns `true`
@@ -357,7 +358,7 @@ pub trait SystemCondition<Marker, In: SystemInput = (), Out = bool>:
         let a = IntoSystem::into_system(self);
         let b = IntoSystem::into_system(xnor);
         let name = format!("!({} ^ {})", a.name(), b.name());
-        CombinatorSystem::new(a, b, Cow::Owned(name))
+        CombinatorSystem::new(a, b, DebugName::owned(name))
     }
 
     /// Returns a new run condition that only returns `true`
@@ -399,7 +400,7 @@ pub trait SystemCondition<Marker, In: SystemInput = (), Out = bool>:
         let a = IntoSystem::into_system(self);
         let b = IntoSystem::into_system(xor);
         let name = format!("({} ^ {})", a.name(), b.name());
-        CombinatorSystem::new(a, b, Cow::Owned(name))
+        CombinatorSystem::new(a, b, DebugName::owned(name))
     }
 }
 

crates/bevy_ecs/src/schedule/executor/mod.rs

@@ -3,7 +3,8 @@ mod multi_threaded;
 mod simple;
 mod single_threaded;
 
-use alloc::{borrow::Cow, vec, vec::Vec};
+use alloc::{vec, vec::Vec};
+use bevy_utils::prelude::DebugName;
 use core::any::TypeId;
 
 #[expect(deprecated, reason = "We still need to support this.")]
@@ -158,8 +159,8 @@ impl System for ApplyDeferred {
     type In = ();
     type Out = Result<()>;
 
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
-        Cow::Borrowed("bevy_ecs::apply_deferred")
+        DebugName::borrowed("bevy_ecs::apply_deferred")
     }
 
     fn flags(&self) -> SystemStateFlags {

crates/bevy_ecs/src/schedule/executor/multi_threaded.rs

@@ -342,7 +342,7 @@ impl<'scope, 'env: 'scope, 'sys> Context<'scope, 'env, 'sys> {
             #[cfg(feature = "std")]
             #[expect(clippy::print_stderr, reason = "Allowed behind `std` feature gate.")]
             {
-                eprintln!("Encountered a panic in system `{}`!", &*system.name());
+                eprintln!("Encountered a panic in system `{}`!", system.name());
             }
             // set the payload to propagate the error
             {
@@ -799,7 +799,7 @@ fn apply_deferred(
             {
                 eprintln!(
                     "Encountered a panic when applying buffers for system `{}`!",
-                    &*system.name()
+                    system.name()
                 );
             }
             return Err(payload);

crates/bevy_ecs/src/schedule/executor/simple.rs

@@ -73,7 +73,7 @@ impl SystemExecutor for SimpleExecutor {
             #[cfg(feature = "trace")]
             let name = schedule.systems[system_index].system.name();
             #[cfg(feature = "trace")]
-            let should_run_span = info_span!("check_conditions", name = &*name).entered();
+            let should_run_span = info_span!("check_conditions", name = name.as_string()).entered();
 
             let mut should_run = !self.completed_systems.contains(system_index);
             for set_idx in schedule.sets_with_conditions_of_systems[system_index].ones() {
@@ -161,7 +161,7 @@ impl SystemExecutor for SimpleExecutor {
             #[expect(clippy::print_stderr, reason = "Allowed behind `std` feature gate.")]
             {
                 if let Err(payload) = std::panic::catch_unwind(f) {
-                    eprintln!("Encountered a panic in system `{}`!", &*system.name());
+                    eprintln!("Encountered a panic in system `{}`!", system.name());
                     std::panic::resume_unwind(payload);
                 }
             }

crates/bevy_ecs/src/schedule/executor/single_threaded.rs

@@ -74,7 +74,7 @@ impl SystemExecutor for SingleThreadedExecutor {
             #[cfg(feature = "trace")]
             let name = schedule.systems[system_index].system.name();
             #[cfg(feature = "trace")]
-            let should_run_span = info_span!("check_conditions", name = &*name).entered();
+            let should_run_span = info_span!("check_conditions", name = name.as_string()).entered();
 
             let mut should_run = !self.completed_systems.contains(system_index);
             for set_idx in schedule.sets_with_conditions_of_systems[system_index].ones() {
@@ -166,7 +166,7 @@ impl SystemExecutor for SingleThreadedExecutor {
             #[expect(clippy::print_stderr, reason = "Allowed behind `std` feature gate.")]
             {
                 if let Err(payload) = std::panic::catch_unwind(f) {
-                    eprintln!("Encountered a panic in system `{}`!", &*system.name());
+                    eprintln!("Encountered a panic in system `{}`!", system.name());
                     std::panic::resume_unwind(payload);
                 }
             }

crates/bevy_ecs/src/schedule/schedule.rs

@@ -2,7 +2,6 @@
     clippy::module_inception,
     reason = "This instance of module inception is being discussed; see #17344."
 )]
-use alloc::borrow::Cow;
 use alloc::{
     boxed::Box,
     collections::{BTreeMap, BTreeSet},
@@ -12,12 +11,11 @@ use alloc::{
     vec::Vec,
 };
 use bevy_platform::collections::{HashMap, HashSet};
-use bevy_utils::{default, TypeIdMap};
+use bevy_utils::{default, prelude::DebugName, TypeIdMap};
 use core::{
     any::{Any, TypeId},
     fmt::{Debug, Write},
 };
-use disqualified::ShortName;
 use fixedbitset::FixedBitSet;
 use log::{error, info, warn};
 use pass::ScheduleBuildPassObj;
@@ -1694,14 +1692,14 @@ impl ScheduleGraph {
 
     #[inline]
     fn get_node_name_inner(&self, id: &NodeId, report_sets: bool) -> String {
-        let name = match id {
+        match id {
             NodeId::System(_) => {
-                let name = self.systems[id.index()]
+                let name = self.systems[id.index()].get().unwrap().system.name();
-                    .get()
+                let name = if self.settings.use_shortnames {
-                    .unwrap()
+                    name.shortname().to_string()
-                    .system
+                } else {
-                    .name()
+                    name.to_string()
-                    .to_string();
+                };
                 if report_sets {
                     let sets = self.names_of_sets_containing_node(id);
                     if sets.is_empty() {
@@ -1723,11 +1721,6 @@ impl ScheduleGraph {
                     set.name()
                 }
             }
-        };
-        if self.settings.use_shortnames {
-            ShortName(&name).to_string()
-        } else {
-            name
         }
     }
 
@@ -2007,7 +2000,7 @@ impl ScheduleGraph {
         &'a self,
         ambiguities: &'a [(NodeId, NodeId, Vec<ComponentId>)],
         components: &'a Components,
-    ) -> impl Iterator<Item = (String, String, Vec<Cow<'a, str>>)> + 'a {
+    ) -> impl Iterator<Item = (String, String, Vec<DebugName>)> + 'a {
         ambiguities
             .iter()
             .map(move |(system_a, system_b, conflicts)| {

crates/bevy_ecs/src/schedule/set.rs

@@ -1,4 +1,5 @@
 use alloc::boxed::Box;
+use bevy_utils::prelude::DebugName;
 use core::{
     any::TypeId,
     fmt::Debug,
@@ -196,7 +197,7 @@ impl<T: 'static> SystemTypeSet<T> {
 impl<T> Debug for SystemTypeSet<T> {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
         f.debug_tuple("SystemTypeSet")
-            .field(&format_args!("fn {}()", &core::any::type_name::<T>()))
+            .field(&format_args!("fn {}()", DebugName::type_name::<T>()))
             .finish()
     }
 }

crates/bevy_ecs/src/schedule/stepping.rs

@@ -895,9 +895,9 @@ mod tests {
         ($schedule:expr, $skipped_systems:expr, $($system:expr),*) => {
             // pull an ordered list of systems in the schedule, and save the
             // system TypeId, and name.
-            let systems: Vec<(TypeId, alloc::borrow::Cow<'static, str>)> = $schedule.systems().unwrap()
+            let systems: Vec<(TypeId, alloc::string::String)> = $schedule.systems().unwrap()
                 .map(|(_, system)| {
-                    (system.type_id(), system.name())
+                    (system.type_id(), system.name().as_string())
                 })
             .collect();
 

crates/bevy_ecs/src/storage/resource.rs

@@ -3,8 +3,8 @@ use crate::{
     component::{CheckChangeTicks, ComponentId, ComponentTicks, Components, Tick, TickCells},
     storage::{blob_vec::BlobVec, SparseSet},
 };
-use alloc::string::String;
 use bevy_ptr::{OwningPtr, Ptr, UnsafeCellDeref};
+use bevy_utils::prelude::DebugName;
 use core::{cell::UnsafeCell, mem::ManuallyDrop, panic::Location};
 
 #[cfg(feature = "std")]
@@ -23,7 +23,7 @@ pub struct ResourceData<const SEND: bool> {
         not(feature = "std"),
         expect(dead_code, reason = "currently only used with the std feature")
     )]
-    type_name: String,
+    type_name: DebugName,
     #[cfg(feature = "std")]
     origin_thread_id: Option<ThreadId>,
     changed_by: MaybeLocation<UnsafeCell<&'static Location<'static>>>,
@@ -385,7 +385,7 @@ impl<const SEND: bool> Resources<SEND> {
                 data: ManuallyDrop::new(data),
                 added_ticks: UnsafeCell::new(Tick::new(0)),
                 changed_ticks: UnsafeCell::new(Tick::new(0)),
-                type_name: String::from(component_info.name()),
+                type_name: component_info.name(),
                 #[cfg(feature = "std")]
                 origin_thread_id: None,
                 changed_by: MaybeLocation::caller().map(UnsafeCell::new),

crates/bevy_ecs/src/system/adapter_system.rs

@@ -1,4 +1,5 @@
-use alloc::{borrow::Cow, vec::Vec};
+use alloc::vec::Vec;
+use bevy_utils::prelude::DebugName;
 
 use super::{IntoSystem, ReadOnlySystem, System, SystemParamValidationError};
 use crate::{
@@ -101,7 +102,7 @@ where
 pub struct AdapterSystem<Func, S> {
     func: Func,
     system: S,
-    name: Cow<'static, str>,
+    name: DebugName,
 }
 
 impl<Func, S> AdapterSystem<Func, S>
@@ -110,7 +111,7 @@ where
     S: System,
 {
     /// Creates a new [`System`] that uses `func` to adapt `system`, via the [`Adapt`] trait.
-    pub const fn new(func: Func, system: S, name: Cow<'static, str>) -> Self {
+    pub const fn new(func: Func, system: S, name: DebugName) -> Self {
         Self { func, system, name }
     }
 }
@@ -123,7 +124,7 @@ where
     type In = Func::In;
     type Out = Func::Out;
 
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.name.clone()
     }
 

crates/bevy_ecs/src/system/combinator.rs

@@ -1,4 +1,5 @@
-use alloc::{borrow::Cow, format, vec::Vec};
+use alloc::{format, vec::Vec};
+use bevy_utils::prelude::DebugName;
 use core::marker::PhantomData;
 
 use crate::{
@@ -55,7 +56,7 @@ use super::{IntoSystem, ReadOnlySystem, System};
 ///     IntoSystem::into_system(resource_equals(A(1))),
 ///     IntoSystem::into_system(resource_equals(B(1))),
 ///     // The name of the combined system.
-///     std::borrow::Cow::Borrowed("a ^ b"),
+///     "a ^ b".into(),
 /// )));
 /// # fn my_system(mut flag: ResMut<RanFlag>) { flag.0 = true; }
 /// #
@@ -112,14 +113,14 @@ pub struct CombinatorSystem<Func, A, B> {
     _marker: PhantomData<fn() -> Func>,
     a: A,
     b: B,
-    name: Cow<'static, str>,
+    name: DebugName,
 }
 
 impl<Func, A, B> CombinatorSystem<Func, A, B> {
     /// Creates a new system that combines two inner systems.
     ///
     /// The returned system will only be usable if `Func` implements [`Combine<A, B>`].
-    pub fn new(a: A, b: B, name: Cow<'static, str>) -> Self {
+    pub fn new(a: A, b: B, name: DebugName) -> Self {
         Self {
             _marker: PhantomData,
             a,
@@ -138,7 +139,7 @@ where
     type In = Func::In;
     type Out = Func::Out;
 
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.name.clone()
     }
 
@@ -271,7 +272,7 @@ where
         let system_a = IntoSystem::into_system(this.a);
         let system_b = IntoSystem::into_system(this.b);
         let name = format!("Pipe({}, {})", system_a.name(), system_b.name());
-        PipeSystem::new(system_a, system_b, Cow::Owned(name))
+        PipeSystem::new(system_a, system_b, DebugName::owned(name))
     }
 }
 
@@ -317,7 +318,7 @@ where
 pub struct PipeSystem<A, B> {
     a: A,
     b: B,
-    name: Cow<'static, str>,
+    name: DebugName,
 }
 
 impl<A, B> PipeSystem<A, B>
@@ -327,7 +328,7 @@ where
     for<'a> B::In: SystemInput<Inner<'a> = A::Out>,
 {
     /// Creates a new system that pipes two inner systems.
-    pub fn new(a: A, b: B, name: Cow<'static, str>) -> Self {
+    pub fn new(a: A, b: B, name: DebugName) -> Self {
         Self { a, b, name }
     }
 }
@@ -341,7 +342,7 @@ where
     type In = A::In;
     type Out = B::Out;
 
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.name.clone()
     }
 

crates/bevy_ecs/src/system/commands/command.rs

@@ -144,10 +144,11 @@ where
 
 /// A [`Command`] that runs the given system,
 /// caching its [`SystemId`] in a [`CachedSystemId`](crate::system::CachedSystemId) resource.
-pub fn run_system_cached<M, S>(system: S) -> impl Command<Result>
+pub fn run_system_cached<O, M, S>(system: S) -> impl Command<Result>
 where
+    O: 'static,
     M: 'static,
-    S: IntoSystem<(), (), M> + Send + 'static,
+    S: IntoSystem<(), O, M> + Send + 'static,
 {
     move |world: &mut World| -> Result {
         world.run_system_cached(system)?;
@@ -157,11 +158,15 @@ where
 
 /// A [`Command`] that runs the given system with the given input value,
 /// caching its [`SystemId`] in a [`CachedSystemId`](crate::system::CachedSystemId) resource.
-pub fn run_system_cached_with<I, M, S>(system: S, input: I::Inner<'static>) -> impl Command<Result>
+pub fn run_system_cached_with<I, O, M, S>(
+    system: S,
+    input: I::Inner<'static>,
+) -> impl Command<Result>
 where
     I: SystemInput<Inner<'static>: Send> + Send + 'static,
+    O: 'static,
     M: 'static,
-    S: IntoSystem<I, (), M> + Send + 'static,
+    S: IntoSystem<I, O, M> + Send + 'static,
 {
     move |world: &mut World| -> Result {
         world.run_system_cached_with(system, input)?;
@@ -175,7 +180,7 @@ where
 pub fn unregister_system<I, O>(system_id: SystemId<I, O>) -> impl Command<Result>
 where
     I: SystemInput + Send + 'static,
-    O: Send + 'static,
+    O: 'static,
 {
     move |world: &mut World| -> Result {
         world.unregister_system(system_id)?;

crates/bevy_ecs/src/system/commands/mod.rs

@@ -917,7 +917,7 @@ impl<'w, 's> Commands<'w, 's> {
     ///
     /// It will internally return a [`RegisteredSystemError`](crate::system::system_registry::RegisteredSystemError),
     /// which will be handled by [logging the error at the `warn` level](warn).
-    pub fn run_system(&mut self, id: SystemId) {
+    pub fn run_system<O: 'static>(&mut self, id: SystemId<(), O>) {
         self.queue(command::run_system(id).handle_error_with(warn));
     }
 
@@ -1010,7 +1010,7 @@ impl<'w, 's> Commands<'w, 's> {
     ) -> SystemId<I, O>
     where
         I: SystemInput + Send + 'static,
-        O: Send + 'static,
+        O: 'static,
     {
         let entity = self.spawn_empty().id();
         let system = RegisteredSystem::<I, O>::new(Box::new(IntoSystem::into_system(system)));
@@ -1035,7 +1035,7 @@ impl<'w, 's> Commands<'w, 's> {
     pub fn unregister_system<I, O>(&mut self, system_id: SystemId<I, O>)
     where
         I: SystemInput + Send + 'static,
-        O: Send + 'static,
+        O: 'static,
     {
         self.queue(command::unregister_system(system_id).handle_error_with(warn));
     }
@@ -1084,10 +1084,11 @@ impl<'w, 's> Commands<'w, 's> {
     /// consider passing them in as inputs via [`Commands::run_system_cached_with`].
     ///
     /// If that's not an option, consider [`Commands::register_system`] instead.
-    pub fn run_system_cached<M, S>(&mut self, system: S)
+    pub fn run_system_cached<O, M, S>(&mut self, system: S)
     where
+        O: 'static,
         M: 'static,
-        S: IntoSystem<(), (), M> + Send + 'static,
+        S: IntoSystem<(), O, M> + Send + 'static,
     {
         self.queue(command::run_system_cached(system).handle_error_with(warn));
     }
@@ -1114,11 +1115,12 @@ impl<'w, 's> Commands<'w, 's> {
     /// consider passing them in as inputs.
     ///
     /// If that's not an option, consider [`Commands::register_system`] instead.
-    pub fn run_system_cached_with<I, M, S>(&mut self, system: S, input: I::Inner<'static>)
+    pub fn run_system_cached_with<I, O, M, S>(&mut self, system: S, input: I::Inner<'static>)
     where
         I: SystemInput<Inner<'static>: Send> + Send + 'static,
+        O: 'static,
         M: 'static,
-        S: IntoSystem<I, (), M> + Send + 'static,
+        S: IntoSystem<I, O, M> + Send + 'static,
     {
         self.queue(command::run_system_cached_with(system, input).handle_error_with(warn));
     }

crates/bevy_ecs/src/system/exclusive_function_system.rs

@@ -10,6 +10,7 @@ use crate::{
 };
 
 use alloc::{borrow::Cow, vec, vec::Vec};
+use bevy_utils::prelude::DebugName;
 use core::marker::PhantomData;
 use variadics_please::all_tuples;
 
@@ -42,7 +43,7 @@ where
     ///
     /// Useful to give closure systems more readable and unique names for debugging and tracing.
     pub fn with_name(mut self, new_name: impl Into<Cow<'static, str>>) -> Self {
-        self.system_meta.set_name(new_name.into());
+        self.system_meta.set_name(new_name);
         self
     }
 }
@@ -83,7 +84,7 @@ where
     type Out = F::Out;
 
     #[inline]
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.system_meta.name.clone()
     }
 
@@ -181,7 +182,7 @@ where
         check_system_change_tick(
             &mut self.system_meta.last_run,
             check,
-            self.system_meta.name.as_ref(),
+            self.system_meta.name.clone(),
         );
     }
 

crates/bevy_ecs/src/system/function_system.rs

@@ -11,6 +11,7 @@ use crate::{
 };
 
 use alloc::{borrow::Cow, vec, vec::Vec};
+use bevy_utils::prelude::DebugName;
 use core::marker::PhantomData;
 use variadics_please::all_tuples;
 
@@ -24,7 +25,7 @@ use super::{
 /// The metadata of a [`System`].
 #[derive(Clone)]
 pub struct SystemMeta {
-    pub(crate) name: Cow<'static, str>,
+    pub(crate) name: DebugName,
     // NOTE: this must be kept private. making a SystemMeta non-send is irreversible to prevent
     // SystemParams from overriding each other
     flags: SystemStateFlags,
@@ -37,21 +38,21 @@ pub struct SystemMeta {
 
 impl SystemMeta {
     pub(crate) fn new<T>() -> Self {
-        let name = core::any::type_name::<T>();
+        let name = DebugName::type_name::<T>();
         Self {
-            name: name.into(),
+            #[cfg(feature = "trace")]
+            system_span: info_span!("system", name = name.clone().as_string()),
+            #[cfg(feature = "trace")]
+            commands_span: info_span!("system_commands", name = name.clone().as_string()),
+            name,
             flags: SystemStateFlags::empty(),
             last_run: Tick::new(0),
-            #[cfg(feature = "trace")]
-            system_span: info_span!("system", name = name),
-            #[cfg(feature = "trace")]
-            commands_span: info_span!("system_commands", name = name),
         }
     }
 
     /// Returns the system's name
     #[inline]
-    pub fn name(&self) -> &str {
+    pub fn name(&self) -> &DebugName {
         &self.name
     }
 
@@ -67,7 +68,7 @@ impl SystemMeta {
             self.system_span = info_span!("system", name = name);
             self.commands_span = info_span!("system_commands", name = name);
         }
-        self.name = new_name;
+        self.name = new_name.into();
     }
 
     /// Returns true if the system is [`Send`].
@@ -600,7 +601,7 @@ where
     type Out = F::Out;
 
     #[inline]
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.system_meta.name.clone()
     }
 
@@ -712,7 +713,7 @@ where
         check_system_change_tick(
             &mut self.system_meta.last_run,
             check,
-            self.system_meta.name.as_ref(),
+            self.system_meta.name.clone(),
         );
     }
 

crates/bevy_ecs/src/system/observer_system.rs

@@ -1,4 +1,5 @@
-use alloc::{borrow::Cow, vec::Vec};
+use alloc::vec::Vec;
+use bevy_utils::prelude::DebugName;
 use core::marker::PhantomData;
 
 use crate::{
@@ -112,7 +113,7 @@ where
     type Out = Result;
 
     #[inline]
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.observer.name()
     }
 

crates/bevy_ecs/src/system/query.rs

@@ -1,3 +1,5 @@
+use bevy_utils::prelude::DebugName;
+
 use crate::{
     batching::BatchingStrategy,
     component::Tick,
@@ -1185,7 +1187,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     /// [`par_iter_mut`]: Self::par_iter_mut
     /// [`World`]: crate::world::World
     #[inline]
-    pub fn par_iter(&self) -> QueryParIter<'_, '_, D::ReadOnly, F> {
+    pub fn par_iter(&self) -> QueryParIter<'_, 's, D::ReadOnly, F> {
         self.as_readonly().par_iter_inner()
     }
 
@@ -1220,7 +1222,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     /// [`par_iter`]: Self::par_iter
     /// [`World`]: crate::world::World
     #[inline]
-    pub fn par_iter_mut(&mut self) -> QueryParIter<'_, '_, D, F> {
+    pub fn par_iter_mut(&mut self) -> QueryParIter<'_, 's, D, F> {
         self.reborrow().par_iter_inner()
     }
 
@@ -1280,7 +1282,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn par_iter_many<EntityList: IntoIterator<Item: EntityEquivalent>>(
         &self,
         entities: EntityList,
-    ) -> QueryParManyIter<'_, '_, D::ReadOnly, F, EntityList::Item> {
+    ) -> QueryParManyIter<'_, 's, D::ReadOnly, F, EntityList::Item> {
         QueryParManyIter {
             world: self.world,
             state: self.state.as_readonly(),
@@ -1309,7 +1311,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn par_iter_many_unique<EntityList: EntitySet<Item: Sync>>(
         &self,
         entities: EntityList,
-    ) -> QueryParManyUniqueIter<'_, '_, D::ReadOnly, F, EntityList::Item> {
+    ) -> QueryParManyUniqueIter<'_, 's, D::ReadOnly, F, EntityList::Item> {
         QueryParManyUniqueIter {
             world: self.world,
             state: self.state.as_readonly(),
@@ -1338,7 +1340,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn par_iter_many_unique_mut<EntityList: EntitySet<Item: Sync>>(
         &mut self,
         entities: EntityList,
-    ) -> QueryParManyUniqueIter<'_, '_, D, F, EntityList::Item> {
+    ) -> QueryParManyUniqueIter<'_, 's, D, F, EntityList::Item> {
         QueryParManyUniqueIter {
             world: self.world,
             state: self.state,
@@ -1383,7 +1385,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     ///
     /// - [`get_mut`](Self::get_mut) to get a mutable query item.
     #[inline]
-    pub fn get(&self, entity: Entity) -> Result<ROQueryItem<'_, D>, QueryEntityError> {
+    pub fn get(&self, entity: Entity) -> Result<ROQueryItem<'_, 's, D>, QueryEntityError> {
         self.as_readonly().get_inner(entity)
     }
 
@@ -1434,7 +1436,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn get_many<const N: usize>(
         &self,
         entities: [Entity; N],
-    ) -> Result<[ROQueryItem<'_, D>; N], QueryEntityError> {
+    ) -> Result<[ROQueryItem<'_, 's, D>; N], QueryEntityError> {
         // Note that we call a separate `*_inner` method from `get_many_mut`
         // because we don't need to check for duplicates.
         self.as_readonly().get_many_inner(entities)
@@ -1485,7 +1487,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn get_many_unique<const N: usize>(
         &self,
         entities: UniqueEntityArray<N>,
-    ) -> Result<[ROQueryItem<'_, D>; N], QueryEntityError> {
+    ) -> Result<[ROQueryItem<'_, 's, D>; N], QueryEntityError> {
         self.as_readonly().get_many_unique_inner(entities)
     }
 
@@ -1519,7 +1521,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     ///
     /// - [`get`](Self::get) to get a read-only query item.
     #[inline]
-    pub fn get_mut(&mut self, entity: Entity) -> Result<D::Item<'_>, QueryEntityError> {
+    pub fn get_mut(&mut self, entity: Entity) -> Result<D::Item<'_, 's>, QueryEntityError> {
         self.reborrow().get_inner(entity)
     }
 
@@ -1534,7 +1536,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     ///
     /// - [`get_mut`](Self::get_mut) to get the item using a mutable borrow of the [`Query`].
     #[inline]
-    pub fn get_inner(self, entity: Entity) -> Result<D::Item<'w>, QueryEntityError> {
+    pub fn get_inner(self, entity: Entity) -> Result<D::Item<'w, 's>, QueryEntityError> {
         // SAFETY: system runs without conflicts with other systems.
         // same-system queries have runtime borrow checks when they conflict
         unsafe {
@@ -1576,8 +1578,18 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
             D::set_archetype(&mut fetch, &self.state.fetch_state, archetype, table);
             F::set_archetype(&mut filter, &self.state.filter_state, archetype, table);
 
-            if F::filter_fetch(&mut filter, entity, location.table_row) {
+            if F::filter_fetch(
-                Ok(D::fetch(&mut fetch, entity, location.table_row))
+                &self.state.filter_state,
+                &mut filter,
+                entity,
+                location.table_row,
+            ) {
+                Ok(D::fetch(
+                    &self.state.fetch_state,
+                    &mut fetch,
+                    entity,
+                    location.table_row,
+                ))
             } else {
                 Err(QueryEntityError::QueryDoesNotMatch(
                     entity,
@@ -1658,7 +1670,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn get_many_mut<const N: usize>(
         &mut self,
         entities: [Entity; N],
-    ) -> Result<[D::Item<'_>; N], QueryEntityError> {
+    ) -> Result<[D::Item<'_, 's>; N], QueryEntityError> {
         self.reborrow().get_many_mut_inner(entities)
     }
 
@@ -1726,7 +1738,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn get_many_unique_mut<const N: usize>(
         &mut self,
         entities: UniqueEntityArray<N>,
-    ) -> Result<[D::Item<'_>; N], QueryEntityError> {
+    ) -> Result<[D::Item<'_, 's>; N], QueryEntityError> {
         self.reborrow().get_many_unique_inner(entities)
     }
 
@@ -1745,7 +1757,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn get_many_mut_inner<const N: usize>(
         self,
         entities: [Entity; N],
-    ) -> Result<[D::Item<'w>; N], QueryEntityError> {
+    ) -> Result<[D::Item<'w, 's>; N], QueryEntityError> {
         // Verify that all entities are unique
         for i in 0..N {
             for j in 0..i {
@@ -1773,7 +1785,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn get_many_inner<const N: usize>(
         self,
         entities: [Entity; N],
-    ) -> Result<[D::Item<'w>; N], QueryEntityError>
+    ) -> Result<[D::Item<'w, 's>; N], QueryEntityError>
     where
         D: ReadOnlyQueryData,
     {
@@ -1795,7 +1807,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     pub fn get_many_unique_inner<const N: usize>(
         self,
         entities: UniqueEntityArray<N>,
-    ) -> Result<[D::Item<'w>; N], QueryEntityError> {
+    ) -> Result<[D::Item<'w, 's>; N], QueryEntityError> {
         // SAFETY: All entities are unique, so the results don't alias.
         unsafe { self.get_many_impl(entities.into_inner()) }
     }
@@ -1810,7 +1822,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     unsafe fn get_many_impl<const N: usize>(
         self,
         entities: [Entity; N],
-    ) -> Result<[D::Item<'w>; N], QueryEntityError> {
+    ) -> Result<[D::Item<'w, 's>; N], QueryEntityError> {
         let mut values = [(); N].map(|_| MaybeUninit::uninit());
 
         for (value, entity) in core::iter::zip(&mut values, entities) {
@@ -1838,7 +1850,10 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     ///
     /// - [`get_mut`](Self::get_mut) for the safe version.
     #[inline]
-    pub unsafe fn get_unchecked(&self, entity: Entity) -> Result<D::Item<'_>, QueryEntityError> {
+    pub unsafe fn get_unchecked(
+        &self,
+        entity: Entity,
+    ) -> Result<D::Item<'_, 's>, QueryEntityError> {
         // SAFETY: The caller promises that this will not result in multiple mutable references.
         unsafe { self.reborrow_unsafe() }.get_inner(entity)
     }
@@ -1874,7 +1889,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     ///
     /// - [`single_mut`](Self::single_mut) to get the mutable query item.
     #[inline]
-    pub fn single(&self) -> Result<ROQueryItem<'_, D>, QuerySingleError> {
+    pub fn single(&self) -> Result<ROQueryItem<'_, 's, D>, QuerySingleError> {
         self.as_readonly().single_inner()
     }
 
@@ -1903,7 +1918,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     ///
     /// - [`single`](Self::single) to get the read-only query item.
     #[inline]
-    pub fn single_mut(&mut self) -> Result<D::Item<'_>, QuerySingleError> {
+    pub fn single_mut(&mut self) -> Result<D::Item<'_, 's>, QuerySingleError> {
         self.reborrow().single_inner()
     }
 
@@ -1935,15 +1950,15 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
     /// - [`single_mut`](Self::single_mut) to get the mutable query item.
     /// - [`single_inner`](Self::single_inner) for the panicking version.
     #[inline]
-    pub fn single_inner(self) -> Result<D::Item<'w>, QuerySingleError> {
+    pub fn single_inner(self) -> Result<D::Item<'w, 's>, QuerySingleError> {
         let mut query = self.into_iter();
         let first = query.next();
         let extra = query.next().is_some();
 
         match (first, extra) {
             (Some(r), false) => Ok(r),
-            (None, _) => Err(QuerySingleError::NoEntities(core::any::type_name::<Self>())),
+            (None, _) => Err(QuerySingleError::NoEntities(DebugName::type_name::<Self>())),
-            (Some(_), _) => Err(QuerySingleError::MultipleEntities(core::any::type_name::<
+            (Some(_), _) => Err(QuerySingleError::MultipleEntities(DebugName::type_name::<
                 Self,
             >())),
         }
@@ -2447,7 +2462,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> Query<'w, 's, D, F> {
 }
 
 impl<'w, 's, D: QueryData, F: QueryFilter> IntoIterator for Query<'w, 's, D, F> {
-    type Item = D::Item<'w>;
+    type Item = D::Item<'w, 's>;
     type IntoIter = QueryIter<'w, 's, D, F>;
 
     fn into_iter(self) -> Self::IntoIter {
@@ -2460,7 +2475,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> IntoIterator for Query<'w, 's, D, F>
 }
 
 impl<'w, 's, D: QueryData, F: QueryFilter> IntoIterator for &'w Query<'_, 's, D, F> {
-    type Item = ROQueryItem<'w, D>;
+    type Item = ROQueryItem<'w, 's, D>;
     type IntoIter = QueryIter<'w, 's, D::ReadOnly, F>;
 
     fn into_iter(self) -> Self::IntoIter {
@@ -2469,7 +2484,7 @@ impl<'w, 's, D: QueryData, F: QueryFilter> IntoIterator for &'w Query<'_, 's, D,
 }
 
 impl<'w, 's, D: QueryData, F: QueryFilter> IntoIterator for &'w mut Query<'_, 's, D, F> {
-    type Item = D::Item<'w>;
+    type Item = D::Item<'w, 's>;
     type IntoIter = QueryIter<'w, 's, D, F>;
 
     fn into_iter(self) -> Self::IntoIter {
@@ -2584,28 +2599,28 @@ impl<'w, 'q, Q: QueryData, F: QueryFilter> From<&'q mut Query<'w, '_, Q, F>>
 /// ```
 /// Note that because [`Single`] implements [`Deref`] and [`DerefMut`], methods and fields like `health` can be accessed directly.
 /// You can also access the underlying data manually, by calling `.deref`/`.deref_mut`, or by using the `*` operator.
-pub struct Single<'w, D: QueryData, F: QueryFilter = ()> {
+pub struct Single<'w, 's, D: QueryData, F: QueryFilter = ()> {
-    pub(crate) item: D::Item<'w>,
+    pub(crate) item: D::Item<'w, 's>,
     pub(crate) _filter: PhantomData<F>,
 }
 
-impl<'w, D: QueryData, F: QueryFilter> Deref for Single<'w, D, F> {
+impl<'w, 's, D: QueryData, F: QueryFilter> Deref for Single<'w, 's, D, F> {
-    type Target = D::Item<'w>;
+    type Target = D::Item<'w, 's>;
 
     fn deref(&self) -> &Self::Target {
         &self.item
     }
 }
 
-impl<'w, D: QueryData, F: QueryFilter> DerefMut for Single<'w, D, F> {
+impl<'w, 's, D: QueryData, F: QueryFilter> DerefMut for Single<'w, 's, D, F> {
     fn deref_mut(&mut self) -> &mut Self::Target {
         &mut self.item
     }
 }
 
-impl<'w, D: QueryData, F: QueryFilter> Single<'w, D, F> {
+impl<'w, 's, D: QueryData, F: QueryFilter> Single<'w, 's, D, F> {
     /// Returns the inner item with ownership.
-    pub fn into_inner(self) -> D::Item<'w> {
+    pub fn into_inner(self) -> D::Item<'w, 's> {
         self.item
     }
 }

crates/bevy_ecs/src/system/schedule_system.rs

@@ -1,4 +1,5 @@
-use alloc::{borrow::Cow, vec::Vec};
+use alloc::vec::Vec;
+use bevy_utils::prelude::DebugName;
 
 use crate::{
     component::{CheckChangeTicks, ComponentId, Tick},
@@ -25,7 +26,7 @@ impl<S: System<In = ()>> System for InfallibleSystemWrapper<S> {
     type Out = Result;
 
     #[inline]
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.0.name()
     }
 
@@ -137,10 +138,9 @@ where
     T: Send + Sync + 'static,
 {
     type In = ();
-
     type Out = S::Out;
 
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.system.name()
     }
 
@@ -231,10 +231,9 @@ where
     T: FromWorld + Send + Sync + 'static,
 {
     type In = ();
-
     type Out = S::Out;
 
-    fn name(&self) -> Cow<'static, str> {
+    fn name(&self) -> DebugName {
         self.system.name()
     }
 

crates/bevy_ecs/src/system/system.rs

@@ -2,6 +2,7 @@
     clippy::module_inception,
     reason = "This instance of module inception is being discussed; see #17353."
 )]
+use bevy_utils::prelude::DebugName;
 use bitflags::bitflags;
 use core::fmt::Debug;
 use log::warn;
@@ -15,7 +16,7 @@ use crate::{
     world::{unsafe_world_cell::UnsafeWorldCell, DeferredWorld, World},
 };
 
-use alloc::{borrow::Cow, boxed::Box, vec::Vec};
+use alloc::{boxed::Box, vec::Vec};
 use core::any::TypeId;
 
 use super::{IntoSystem, SystemParamValidationError};
@@ -49,8 +50,9 @@ pub trait System: Send + Sync + 'static {
     type In: SystemInput;
     /// The system's output.
     type Out;
+
     /// Returns the system's name.
-    fn name(&self) -> Cow<'static, str>;
+    fn name(&self) -> DebugName;
     /// Returns the [`TypeId`] of the underlying system type.
     #[inline]
     fn type_id(&self) -> TypeId {
@@ -227,7 +229,7 @@ pub type BoxedSystem<In = (), Out = ()> = Box<dyn System<In = In, Out = Out>>;
 pub(crate) fn check_system_change_tick(
     last_run: &mut Tick,
     check: CheckChangeTicks,
-    system_name: &str,
+    system_name: DebugName,
 ) {
     if last_run.check_tick(check) {
         let age = check.present_tick().relative_to(*last_run).get();
@@ -398,7 +400,7 @@ pub enum RunSystemError {
     #[error("System {system} did not run due to failed parameter validation: {err}")]
     InvalidParams {
         /// The identifier of the system that was run.
-        system: Cow<'static, str>,
+        system: DebugName,
         /// The returned parameter validation error.
         err: SystemParamValidationError,
     },

crates/bevy_ecs/src/system/system_name.rs

@@ -5,9 +5,8 @@ use crate::{
     system::{ExclusiveSystemParam, ReadOnlySystemParam, SystemMeta, SystemParam},
     world::unsafe_world_cell::UnsafeWorldCell,
 };
-use alloc::borrow::Cow;
+use bevy_utils::prelude::DebugName;
-use core::ops::Deref;
+use derive_more::derive::{Display, Into};
-use derive_more::derive::{AsRef, Display, Into};
 
 /// [`SystemParam`] that returns the name of the system which it is used in.
 ///
@@ -35,21 +34,13 @@ use derive_more::derive::{AsRef, Display, Into};
 ///     logger.log("Hello");
 /// }
 /// ```
-#[derive(Debug, Into, Display, AsRef)]
+#[derive(Debug, Into, Display)]
-#[as_ref(str)]
+pub struct SystemName(DebugName);
-pub struct SystemName(Cow<'static, str>);
 
 impl SystemName {
     /// Gets the name of the system.
-    pub fn name(&self) -> &str {
+    pub fn name(&self) -> DebugName {
-        &self.0
+        self.0.clone()
-    }
-}
-
-impl Deref for SystemName {
-    type Target = str;
-    fn deref(&self) -> &Self::Target {
-        self.name()
     }
 }
 
@@ -104,7 +95,7 @@ mod tests {
     #[test]
     fn test_system_name_regular_param() {
         fn testing(name: SystemName) -> String {
-            name.name().to_owned()
+            name.name().as_string()
         }
 
         let mut world = World::default();
@@ -116,7 +107,7 @@ mod tests {
     #[test]
     fn test_system_name_exclusive_param() {
         fn testing(_world: &mut World, name: SystemName) -> String {
-            name.name().to_owned()
+            name.name().as_string()
         }
 
         let mut world = World::default();
@@ -130,7 +121,7 @@ mod tests {
         let mut world = World::default();
         let system =
             IntoSystem::into_system(|name: SystemName| name.name().to_owned()).with_name("testing");
-        let name = world.run_system_once(system).unwrap();
+        let name = world.run_system_once(system).unwrap().as_string();
         assert_eq!(name, "testing");
     }
 
@@ -140,7 +131,7 @@ mod tests {
         let system =
             IntoSystem::into_system(|_world: &mut World, name: SystemName| name.name().to_owned())
                 .with_name("testing");
-        let name = world.run_system_once(system).unwrap();
+        let name = world.run_system_once(system).unwrap().as_string();
         assert_eq!(name, "testing");
     }
 }

crates/bevy_ecs/src/system/system_param.rs

@@ -25,6 +25,7 @@ use alloc::{
 pub use bevy_ecs_macros::SystemParam;
 use bevy_platform::cell::SyncCell;
 use bevy_ptr::UnsafeCellDeref;
+use bevy_utils::prelude::DebugName;
 use core::{
     any::Any,
     fmt::{Debug, Display},
@@ -32,7 +33,6 @@ use core::{
     ops::{Deref, DerefMut},
     panic::Location,
 };
-use disqualified::ShortName;
 use thiserror::Error;
 
 use super::Populated;
@@ -343,8 +343,8 @@ unsafe impl<D: QueryData + 'static, F: QueryFilter + 'static> SystemParam for Qu
     ) {
         assert_component_access_compatibility(
             &system_meta.name,
-            core::any::type_name::<D>(),
+            DebugName::type_name::<D>(),
-            core::any::type_name::<F>(),
+            DebugName::type_name::<F>(),
             component_access_set,
             &state.component_access,
             world,
@@ -368,9 +368,9 @@ unsafe impl<D: QueryData + 'static, F: QueryFilter + 'static> SystemParam for Qu
 }
 
 fn assert_component_access_compatibility(
-    system_name: &str,
+    system_name: &DebugName,
-    query_type: &'static str,
+    query_type: DebugName,
-    filter_type: &'static str,
+    filter_type: DebugName,
     system_access: &FilteredAccessSet<ComponentId>,
     current: &FilteredAccess<ComponentId>,
     world: &World,
@@ -384,14 +384,16 @@ fn assert_component_access_compatibility(
     if !accesses.is_empty() {
         accesses.push(' ');
     }
-    panic!("error[B0001]: Query<{}, {}> in system {system_name} accesses component(s) {accesses}in a way that conflicts with a previous system parameter. Consider using `Without<T>` to create disjoint Queries or merging conflicting Queries into a `ParamSet`. See: https://bevy.org/learn/errors/b0001", ShortName(query_type), ShortName(filter_type));
+    panic!("error[B0001]: Query<{}, {}> in system {system_name} accesses component(s) {accesses}in a way that conflicts with a previous system parameter. Consider using `Without<T>` to create disjoint Queries or merging conflicting Queries into a `ParamSet`. See: https://bevy.org/learn/errors/b0001", query_type.shortname(), filter_type.shortname());
 }
 
 // SAFETY: Relevant query ComponentId access is applied to SystemMeta. If
 // this Query conflicts with any prior access, a panic will occur.
-unsafe impl<'a, D: QueryData + 'static, F: QueryFilter + 'static> SystemParam for Single<'a, D, F> {
+unsafe impl<'a, 'b, D: QueryData + 'static, F: QueryFilter + 'static> SystemParam
+    for Single<'a, 'b, D, F>
+{
     type State = QueryState<D, F>;
-    type Item<'w, 's> = Single<'w, D, F>;
+    type Item<'w, 's> = Single<'w, 's, D, F>;
 
     fn init_state(world: &mut World) -> Self::State {
         Query::init_state(world)
@@ -451,8 +453,8 @@ unsafe impl<'a, D: QueryData + 'static, F: QueryFilter + 'static> SystemParam fo
 }
 
 // SAFETY: QueryState is constrained to read-only fetches, so it only reads World.
-unsafe impl<'a, D: ReadOnlyQueryData + 'static, F: QueryFilter + 'static> ReadOnlySystemParam
+unsafe impl<'a, 'b, D: ReadOnlyQueryData + 'static, F: QueryFilter + 'static> ReadOnlySystemParam
-    for Single<'a, D, F>
+    for Single<'a, 'b, D, F>
 {
 }
 
@@ -765,9 +767,10 @@ unsafe impl<'a, T: Resource> SystemParam for Res<'a, T> {
         assert!(
             !combined_access.has_resource_write(component_id),
             "error[B0002]: Res<{}> in system {} conflicts with a previous ResMut<{0}> access. Consider removing the duplicate access. See: https://bevy.org/learn/errors/b0002",
-            core::any::type_name::<T>(),
+            DebugName::type_name::<T>(),
             system_meta.name,
         );
+
         component_access_set.add_unfiltered_resource_read(component_id);
     }
 
@@ -805,8 +808,8 @@ unsafe impl<'a, T: Resource> SystemParam for Res<'a, T> {
                     panic!(
                         "Resource requested by {} does not exist: {}",
                         system_meta.name,
-                        core::any::type_name::<T>()
+                        DebugName::type_name::<T>()
-                    )
+                    );
                 });
         Res {
             value: ptr.deref(),
@@ -841,11 +844,11 @@ unsafe impl<'a, T: Resource> SystemParam for ResMut<'a, T> {
         if combined_access.has_resource_write(component_id) {
             panic!(
                 "error[B0002]: ResMut<{}> in system {} conflicts with a previous ResMut<{0}> access. Consider removing the duplicate access. See: https://bevy.org/learn/errors/b0002",
-                core::any::type_name::<T>(), system_meta.name);
+                DebugName::type_name::<T>(), system_meta.name);
         } else if combined_access.has_resource_read(component_id) {
             panic!(
                 "error[B0002]: ResMut<{}> in system {} conflicts with a previous Res<{0}> access. Consider removing the duplicate access. See: https://bevy.org/learn/errors/b0002",
-                core::any::type_name::<T>(), system_meta.name);
+                DebugName::type_name::<T>(), system_meta.name);
         }
         component_access_set.add_unfiltered_resource_write(component_id);
     }
@@ -883,8 +886,8 @@ unsafe impl<'a, T: Resource> SystemParam for ResMut<'a, T> {
                 panic!(
                     "Resource requested by {} does not exist: {}",
                     system_meta.name,
-                    core::any::type_name::<T>()
+                    DebugName::type_name::<T>()
-                )
+                );
             });
         ResMut {
             value: value.value.deref_mut::<T>(),
@@ -1433,7 +1436,7 @@ unsafe impl<'a, T: 'static> SystemParam for NonSend<'a, T> {
         assert!(
             !combined_access.has_resource_write(component_id),
             "error[B0002]: NonSend<{}> in system {} conflicts with a previous mutable resource access ({0}). Consider removing the duplicate access. See: https://bevy.org/learn/errors/b0002",
-            core::any::type_name::<T>(),
+            DebugName::type_name::<T>(),
             system_meta.name,
         );
         component_access_set.add_unfiltered_resource_read(component_id);
@@ -1473,7 +1476,7 @@ unsafe impl<'a, T: 'static> SystemParam for NonSend<'a, T> {
                     panic!(
                         "Non-send resource requested by {} does not exist: {}",
                         system_meta.name,
-                        core::any::type_name::<T>()
+                        DebugName::type_name::<T>()
                     )
                 });
 
@@ -1509,11 +1512,11 @@ unsafe impl<'a, T: 'static> SystemParam for NonSendMut<'a, T> {
         if combined_access.has_component_write(component_id) {
             panic!(
                 "error[B0002]: NonSendMut<{}> in system {} conflicts with a previous mutable resource access ({0}). Consider removing the duplicate access. See: https://bevy.org/learn/errors/b0002",
-                core::any::type_name::<T>(), system_meta.name);
+                DebugName::type_name::<T>(), system_meta.name);
         } else if combined_access.has_component_read(component_id) {
             panic!(
                 "error[B0002]: NonSendMut<{}> in system {} conflicts with a previous immutable resource access ({0}). Consider removing the duplicate access. See: https://bevy.org/learn/errors/b0002",
-                core::any::type_name::<T>(), system_meta.name);
+                DebugName::type_name::<T>(), system_meta.name);
         }
         component_access_set.add_unfiltered_resource_write(component_id);
     }
@@ -1552,8 +1555,8 @@ unsafe impl<'a, T: 'static> SystemParam for NonSendMut<'a, T> {
                     panic!(
                         "Non-send resource requested by {} does not exist: {}",
                         system_meta.name,
-                        core::any::type_name::<T>()
+                        DebugName::type_name::<T>()
-                    )
+                    );
                 });
         NonSendMut {
             value: ptr.assert_unique().deref_mut(),
@@ -2805,7 +2808,7 @@ pub struct SystemParamValidationError {
 
     /// A string identifying the invalid parameter.
     /// This is usually the type name of the parameter.
-    pub param: Cow<'static, str>,
+    pub param: DebugName,
 
     /// A string identifying the field within a parameter using `#[derive(SystemParam)]`.
     /// This will be an empty string for other parameters.
@@ -2837,7 +2840,7 @@ impl SystemParamValidationError {
         Self {
             skipped,
             message: message.into(),
-            param: Cow::Borrowed(core::any::type_name::<T>()),
+            param: DebugName::type_name::<T>(),
             field: field.into(),
         }
     }
@@ -2848,7 +2851,7 @@ impl Display for SystemParamValidationError {
         write!(
             fmt,
             "Parameter `{}{}` failed validation: {}",
-            ShortName(&self.param),
+            self.param.shortname(),
             self.field,
             self.message
         )?;

crates/bevy_ecs/src/system/system_registry.rs

@@ -651,6 +651,19 @@ mod tests {
         assert_eq!(output, NonCopy(3));
     }
 
+    #[test]
+    fn fallible_system() {
+        fn sys() -> Result<()> {
+            Err("error")?;
+            Ok(())
+        }
+
+        let mut world = World::new();
+        let fallible_system_id = world.register_system(sys);
+        let output = world.run_system(fallible_system_id);
+        assert!(matches!(output, Ok(Err(_))));
+    }
+
     #[test]
     fn exclusive_system() {
         let mut world = World::new();
@@ -751,19 +764,54 @@ mod tests {
         assert!(matches!(output, Ok(x) if x == four()));
     }
 
+    #[test]
+    fn cached_fallible_system() {
+        fn sys() -> Result<()> {
+            Err("error")?;
+            Ok(())
+        }
+
+        let mut world = World::new();
+        let fallible_system_id = world.register_system_cached(sys);
+        let output = world.run_system(fallible_system_id);
+        assert!(matches!(output, Ok(Err(_))));
+        let output = world.run_system_cached(sys);
+        assert!(matches!(output, Ok(Err(_))));
+        let output = world.run_system_cached_with(sys, ());
+        assert!(matches!(output, Ok(Err(_))));
+    }
+
     #[test]
     fn cached_system_commands() {
         fn sys(mut counter: ResMut<Counter>) {
-            counter.0 = 1;
+            counter.0 += 1;
         }
 
         let mut world = World::new();
         world.insert_resource(Counter(0));
-
         world.commands().run_system_cached(sys);
         world.flush_commands();
-
         assert_eq!(world.resource::<Counter>().0, 1);
+        world.commands().run_system_cached_with(sys, ());
+        world.flush_commands();
+        assert_eq!(world.resource::<Counter>().0, 2);
+    }
+
+    #[test]
+    fn cached_fallible_system_commands() {
+        fn sys(mut counter: ResMut<Counter>) -> Result {
+            counter.0 += 1;
+            Ok(())
+        }
+
+        let mut world = World::new();
+        world.insert_resource(Counter(0));
+        world.commands().run_system_cached(sys);
+        world.flush_commands();
+        assert_eq!(world.resource::<Counter>().0, 1);
+        world.commands().run_system_cached_with(sys, ());
+        world.flush_commands();
+        assert_eq!(world.resource::<Counter>().0, 2);
     }
 
     #[test]

crates/bevy_ecs/src/traversal.rs

@@ -1,6 +1,10 @@
 //! A trait for components that let you traverse the ECS.
 
-use crate::{entity::Entity, query::ReadOnlyQueryData, relationship::Relationship};
+use crate::{
+    entity::Entity,
+    query::{ReadOnlyQueryData, ReleaseStateQueryData},
+    relationship::Relationship,
+};
 
 /// A component that can point to another entity, and which can be used to define a path through the ECS.
 ///
@@ -20,13 +24,13 @@ use crate::{entity::Entity, query::ReadOnlyQueryData, relationship::Relationship
 /// [specify the direction]: crate::event::EntityEvent::Traversal
 /// [event propagation]: crate::observer::On::propagate
 /// [observers]: crate::observer::Observer
-pub trait Traversal<D: ?Sized>: ReadOnlyQueryData {
+pub trait Traversal<D: ?Sized>: ReadOnlyQueryData + ReleaseStateQueryData {
     /// Returns the next entity to visit.
-    fn traverse(item: Self::Item<'_>, data: &D) -> Option<Entity>;
+    fn traverse(item: Self::Item<'_, '_>, data: &D) -> Option<Entity>;
 }
 
 impl<D> Traversal<D> for () {
-    fn traverse(_: Self::Item<'_>, _data: &D) -> Option<Entity> {
+    fn traverse(_: Self::Item<'_, '_>, _data: &D) -> Option<Entity> {
         None
     }
 }
@@ -39,7 +43,7 @@ impl<D> Traversal<D> for () {
 ///
 /// [event propagation]: crate::observer::On::propagate
 impl<R: Relationship, D> Traversal<D> for &R {
-    fn traverse(item: Self::Item<'_>, _data: &D) -> Option<Entity> {
+    fn traverse(item: Self::Item<'_, '_>, _data: &D) -> Option<Entity> {
         Some(item.get())
     }
 }

crates/bevy_ecs/src/world/deferred_world.rs

@@ -1,5 +1,7 @@
 use core::ops::Deref;
 
+use bevy_utils::prelude::DebugName;
+
 use crate::{
     archetype::Archetype,
     change_detection::{MaybeLocation, MutUntyped},
@@ -460,7 +462,7 @@ impl<'w> DeferredWorld<'w> {
                 Did you forget to add it using `app.insert_resource` / `app.init_resource`?
                 Resources are also implicitly added via `app.add_event`,
                 and can be added by plugins.",
-                core::any::type_name::<R>()
+                DebugName::type_name::<R>()
             ),
         }
     }
@@ -489,7 +491,7 @@ impl<'w> DeferredWorld<'w> {
                 "Requested non-send resource {} does not exist in the `World`.
                 Did you forget to add it using `app.insert_non_send_resource` / `app.init_non_send_resource`?
                 Non-send resources can also be added by plugins.",
-                core::any::type_name::<R>()
+                DebugName::type_name::<R>()
             ),
         }
     }
@@ -532,7 +534,7 @@ impl<'w> DeferredWorld<'w> {
         let Some(mut events_resource) = self.get_resource_mut::<Events<E>>() else {
             log::error!(
                 "Unable to send event `{}`\n\tEvent must be added to the app with `add_event()`\n\thttps://docs.rs/bevy/*/bevy/app/struct.App.html#method.add_event ",
-                core::any::type_name::<E>()
+                DebugName::type_name::<E>()
             );
             return None;
         };

crates/bevy_ecs/src/world/entity_ref.rs

@@ -16,7 +16,7 @@ use crate::{
     event::EntityEvent,
     lifecycle::{DESPAWN, REMOVE, REPLACE},
     observer::Observer,
-    query::{Access, DebugCheckedUnwrap, ReadOnlyQueryData},
+    query::{Access, DebugCheckedUnwrap, ReadOnlyQueryData, ReleaseStateQueryData},
     relationship::RelationshipHookMode,
     resource::Resource,
     system::IntoObserverSystem,
@@ -285,14 +285,16 @@ impl<'w> EntityRef<'w> {
     /// # Panics
     ///
     /// If the entity does not have the components required by the query `Q`.
-    pub fn components<Q: ReadOnlyQueryData>(&self) -> Q::Item<'w> {
+    pub fn components<Q: ReadOnlyQueryData + ReleaseStateQueryData>(&self) -> Q::Item<'w, 'static> {
         self.get_components::<Q>()
             .expect("Query does not match the current entity")
     }
 
     /// Returns read-only components for the current entity that match the query `Q`,
     /// or `None` if the entity does not have the components required by the query `Q`.
-    pub fn get_components<Q: ReadOnlyQueryData>(&self) -> Option<Q::Item<'w>> {
+    pub fn get_components<Q: ReadOnlyQueryData + ReleaseStateQueryData>(
+        &self,
+    ) -> Option<Q::Item<'w, 'static>> {
         // SAFETY: We have read-only access to all components of this entity.
         unsafe { self.cell.get_components::<Q>() }
     }
@@ -558,13 +560,15 @@ impl<'w> EntityMut<'w> {
     /// # Panics
     ///
     /// If the entity does not have the components required by the query `Q`.
-    pub fn components<Q: ReadOnlyQueryData>(&self) -> Q::Item<'_> {
+    pub fn components<Q: ReadOnlyQueryData + ReleaseStateQueryData>(&self) -> Q::Item<'_, 'static> {
         self.as_readonly().components::<Q>()
     }
 
     /// Returns read-only components for the current entity that match the query `Q`,
     /// or `None` if the entity does not have the components required by the query `Q`.
-    pub fn get_components<Q: ReadOnlyQueryData>(&self) -> Option<Q::Item<'_>> {
+    pub fn get_components<Q: ReadOnlyQueryData + ReleaseStateQueryData>(
+        &self,
+    ) -> Option<Q::Item<'_, 'static>> {
         self.as_readonly().get_components::<Q>()
     }
 
@@ -1325,7 +1329,7 @@ impl<'w> EntityWorldMut<'w> {
     /// If the entity does not have the components required by the query `Q` or if the entity
     /// has been despawned while this `EntityWorldMut` is still alive.
     #[inline]
-    pub fn components<Q: ReadOnlyQueryData>(&self) -> Q::Item<'_> {
+    pub fn components<Q: ReadOnlyQueryData + ReleaseStateQueryData>(&self) -> Q::Item<'_, 'static> {
         self.as_readonly().components::<Q>()
     }
 
@@ -1336,7 +1340,9 @@ impl<'w> EntityWorldMut<'w> {
     ///
     /// If the entity has been despawned while this `EntityWorldMut` is still alive.
     #[inline]
-    pub fn get_components<Q: ReadOnlyQueryData>(&self) -> Option<Q::Item<'_>> {
+    pub fn get_components<Q: ReadOnlyQueryData + ReleaseStateQueryData>(
+        &self,
+    ) -> Option<Q::Item<'_, 'static>> {
         self.as_readonly().get_components::<Q>()
     }
 

crates/bevy_ecs/src/world/error.rs

@@ -1,6 +1,7 @@
 //! Contains error types returned by bevy's schedule.
 
 use alloc::vec::Vec;
+use bevy_utils::prelude::DebugName;
 
 use crate::{
     component::ComponentId,
@@ -24,7 +25,7 @@ pub struct TryRunScheduleError(pub InternedScheduleLabel);
 #[error("Could not insert bundles of type {bundle_type} into the entities with the following IDs because they do not exist: {entities:?}")]
 pub struct TryInsertBatchError {
     /// The bundles' type name.
-    pub bundle_type: &'static str,
+    pub bundle_type: DebugName,
     /// The IDs of the provided entities that do not exist.
     pub entities: Vec<Entity>,
 }

crates/bevy_ecs/src/world/mod.rs

@@ -25,6 +25,7 @@ use crate::{
     prelude::{Add, Despawn, Insert, Remove, Replace},
 };
 pub use bevy_ecs_macros::FromWorld;
+use bevy_utils::prelude::DebugName;
 pub use deferred_world::DeferredWorld;
 pub use entity_fetch::{EntityFetcher, WorldEntityFetch};
 pub use entity_ref::{
@@ -264,6 +265,12 @@ impl World {
         &self.removed_components
     }
 
+    /// Retrieves this world's [`Observers`] list
+    #[inline]
+    pub fn observers(&self) -> &Observers {
+        &self.observers
+    }
+
     /// Creates a new [`Commands`] instance that writes to the world's command queue
     /// Use [`World::flush`] to apply all queued commands
     #[inline]
@@ -2087,7 +2094,7 @@ impl World {
                 Did you forget to add it using `app.insert_resource` / `app.init_resource`?
                 Resources are also implicitly added via `app.add_event`,
                 and can be added by plugins.",
-                core::any::type_name::<R>()
+                DebugName::type_name::<R>()
             ),
         }
     }
@@ -2111,7 +2118,7 @@ impl World {
                 Did you forget to add it using `app.insert_resource` / `app.init_resource`?
                 Resources are also implicitly added via `app.add_event`,
                 and can be added by plugins.",
-                core::any::type_name::<R>()
+                DebugName::type_name::<R>()
             ),
         }
     }
@@ -2135,7 +2142,7 @@ impl World {
                 Did you forget to add it using `app.insert_resource` / `app.init_resource`?
                 Resources are also implicitly added via `app.add_event`,
                 and can be added by plugins.",
-                core::any::type_name::<R>()
+                DebugName::type_name::<R>()
             ),
         }
     }
@@ -2299,7 +2306,7 @@ impl World {
                 "Requested non-send resource {} does not exist in the `World`.
                 Did you forget to add it using `app.insert_non_send_resource` / `app.init_non_send_resource`?
                 Non-send resources can also be added by plugins.",
-                core::any::type_name::<R>()
+                DebugName::type_name::<R>()
             ),
         }
     }
@@ -2321,7 +2328,7 @@ impl World {
                 "Requested non-send resource {} does not exist in the `World`.
                 Did you forget to add it using `app.insert_non_send_resource` / `app.init_non_send_resource`?
                 Non-send resources can also be added by plugins.",
-                core::any::type_name::<R>()
+                DebugName::type_name::<R>()
             ),
         }
     }
@@ -2660,7 +2667,7 @@ impl World {
             Ok(())
         } else {
             Err(TryInsertBatchError {
-                bundle_type: core::any::type_name::<B>(),
+                bundle_type: DebugName::type_name::<B>(),
                 entities: invalid_entities,
             })
         }
@@ -2694,7 +2701,7 @@ impl World {
     #[track_caller]
     pub fn resource_scope<R: Resource, U>(&mut self, f: impl FnOnce(&mut World, Mut<R>) -> U) -> U {
         self.try_resource_scope(f)
-            .unwrap_or_else(|| panic!("resource does not exist: {}", core::any::type_name::<R>()))
+            .unwrap_or_else(|| panic!("resource does not exist: {}", DebugName::type_name::<R>()))
     }
 
     /// Temporarily removes the requested resource from this [`World`] if it exists, runs custom user code,
@@ -2734,7 +2741,7 @@ impl World {
         assert!(!self.contains_resource::<R>(),
             "Resource `{}` was inserted during a call to World::resource_scope.\n\
             This is not allowed as the original resource is reinserted to the world after the closure is invoked.",
-            core::any::type_name::<R>());
+            DebugName::type_name::<R>());
 
         OwningPtr::make(value, |ptr| {
             // SAFETY: pointer is of type R
@@ -2775,7 +2782,7 @@ impl World {
         let Some(mut events_resource) = self.get_resource_mut::<Events<E>>() else {
             log::error!(
                 "Unable to send event `{}`\n\tEvent must be added to the app with `add_event()`\n\thttps://docs.rs/bevy/*/bevy/app/struct.App.html#method.add_event ",
-                core::any::type_name::<E>()
+                DebugName::type_name::<E>()
             );
             return None;
         };
@@ -3752,6 +3759,7 @@ mod tests {
     };
     use bevy_ecs_macros::Component;
     use bevy_platform::collections::{HashMap, HashSet};
+    use bevy_utils::prelude::DebugName;
     use core::{
         any::TypeId,
         panic,
@@ -3935,12 +3943,12 @@ mod tests {
         let mut iter = world.iter_resources();
 
         let (info, ptr) = iter.next().unwrap();
-        assert_eq!(info.name(), core::any::type_name::<TestResource>());
+        assert_eq!(info.name(), DebugName::type_name::<TestResource>());
         // SAFETY: We know that the resource is of type `TestResource`
         assert_eq!(unsafe { ptr.deref::<TestResource>().0 }, 42);
 
         let (info, ptr) = iter.next().unwrap();
-        assert_eq!(info.name(), core::any::type_name::<TestResource2>());
+        assert_eq!(info.name(), DebugName::type_name::<TestResource2>());
         assert_eq!(
             // SAFETY: We know that the resource is of type `TestResource2`
             unsafe { &ptr.deref::<TestResource2>().0 },
@@ -3963,14 +3971,14 @@ mod tests {
         let mut iter = world.iter_resources_mut();
 
         let (info, mut mut_untyped) = iter.next().unwrap();
-        assert_eq!(info.name(), core::any::type_name::<TestResource>());
+        assert_eq!(info.name(), DebugName::type_name::<TestResource>());
         // SAFETY: We know that the resource is of type `TestResource`
         unsafe {
             mut_untyped.as_mut().deref_mut::<TestResource>().0 = 43;
         };
 
         let (info, mut mut_untyped) = iter.next().unwrap();
-        assert_eq!(info.name(), core::any::type_name::<TestResource2>());
+        assert_eq!(info.name(), DebugName::type_name::<TestResource2>());
         // SAFETY: We know that the resource is of type `TestResource2`
         unsafe {
             mut_untyped.as_mut().deref_mut::<TestResource2>().0 = "Hello, world?".to_string();

crates/bevy_ecs/src/world/reflect.rs

@@ -4,8 +4,8 @@ use core::any::TypeId;
 
 use thiserror::Error;
 
-use alloc::string::{String, ToString};
 use bevy_reflect::{Reflect, ReflectFromPtr};
+use bevy_utils::prelude::DebugName;
 
 use crate::{prelude::*, world::ComponentId};
 
@@ -77,10 +77,7 @@ impl World {
         };
 
         let Some(comp_ptr) = self.get_by_id(entity, component_id) else {
-            let component_name = self
+            let component_name = self.components().get_name(component_id);
-                .components()
-                .get_name(component_id)
-                .map(|name| name.to_string());
 
             return Err(GetComponentReflectError::EntityDoesNotHaveComponent {
                 entity,
@@ -166,10 +163,7 @@ impl World {
 
         // HACK: Only required for the `None`-case/`else`-branch, but it borrows `self`, which will
         // already be mutably borrowed by `self.get_mut_by_id()`, and I didn't find a way around it.
-        let component_name = self
+        let component_name = self.components().get_name(component_id).clone();
-            .components()
-            .get_name(component_id)
-            .map(|name| name.to_string());
 
         let Some(comp_mut_untyped) = self.get_mut_by_id(entity, component_id) else {
             return Err(GetComponentReflectError::EntityDoesNotHaveComponent {
@@ -223,7 +217,7 @@ pub enum GetComponentReflectError {
         component_id: ComponentId,
         /// The name corresponding to the [`Component`] with the given [`TypeId`], or `None`
         /// if not available.
-        component_name: Option<String>,
+        component_name: Option<DebugName>,
     },
 
     /// The [`World`] was missing the [`AppTypeRegistry`] resource.

crates/bevy_ecs/src/world/unsafe_world_cell.rs

@@ -14,7 +14,7 @@ use crate::{
     lifecycle::RemovedComponentEvents,
     observer::Observers,
     prelude::Component,
-    query::{DebugCheckedUnwrap, ReadOnlyQueryData},
+    query::{DebugCheckedUnwrap, ReadOnlyQueryData, ReleaseStateQueryData},
     resource::Resource,
     storage::{ComponentSparseSet, Storages, Table},
     world::RawCommandQueue,
@@ -1005,7 +1005,9 @@ impl<'w> UnsafeEntityCell<'w> {
     /// It is the caller's responsibility to ensure that
     /// - the [`UnsafeEntityCell`] has permission to access the queried data immutably
     /// - no mutable references to the queried data exist at the same time
-    pub(crate) unsafe fn get_components<Q: ReadOnlyQueryData>(&self) -> Option<Q::Item<'w>> {
+    pub(crate) unsafe fn get_components<Q: ReadOnlyQueryData + ReleaseStateQueryData>(
+        &self,
+    ) -> Option<Q::Item<'w, 'static>> {
         // SAFETY: World is only used to access query data and initialize query state
         let state = unsafe {
             let world = self.world().world();
@@ -1035,7 +1037,8 @@ impl<'w> UnsafeEntityCell<'w> {
             // Table corresponds to archetype. State is the same state used to init fetch above.
             unsafe { Q::set_archetype(&mut fetch, &state, archetype, table) }
             // SAFETY: Called after set_archetype above. Entity and location are guaranteed to exist.
-            unsafe { Some(Q::fetch(&mut fetch, self.id(), location.table_row)) }
+            let item = unsafe { Q::fetch(&state, &mut fetch, self.id(), location.table_row) };
+            Some(Q::release_state(item))
         } else {
             None
         }

crates/bevy_gizmos/src/lib.rs

@@ -631,8 +631,8 @@ impl<const I: usize, P: PhaseItem> RenderCommand<P> for SetLineGizmoBindGroup<I>
     #[inline]
     fn render<'w>(
         _item: &P,
-        _view: ROQueryItem<'w, Self::ViewQuery>,
+        _view: ROQueryItem<'w, '_, Self::ViewQuery>,
-        uniform_index: Option<ROQueryItem<'w, Self::ItemQuery>>,
+        uniform_index: Option<ROQueryItem<'w, '_, Self::ItemQuery>>,
         bind_group: SystemParamItem<'w, '_, Self::Param>,
         pass: &mut TrackedRenderPass<'w>,
     ) -> RenderCommandResult {
@@ -662,8 +662,8 @@ impl<P: PhaseItem, const STRIP: bool> RenderCommand<P> for DrawLineGizmo<STRIP>
     #[inline]
     fn render<'w>(
         _item: &P,
-        _view: ROQueryItem<'w, Self::ViewQuery>,
+        _view: ROQueryItem<'w, '_, Self::ViewQuery>,
-        config: Option<ROQueryItem<'w, Self::ItemQuery>>,
+        config: Option<ROQueryItem<'w, '_, Self::ItemQuery>>,
         line_gizmos: SystemParamItem<'w, '_, Self::Param>,
         pass: &mut TrackedRenderPass<'w>,
     ) -> RenderCommandResult {
@@ -725,8 +725,8 @@ impl<P: PhaseItem> RenderCommand<P> for DrawLineJointGizmo {
     #[inline]
     fn render<'w>(
         _item: &P,
-        _view: ROQueryItem<'w, Self::ViewQuery>,
+        _view: ROQueryItem<'w, '_, Self::ViewQuery>,
-        config: Option<ROQueryItem<'w, Self::ItemQuery>>,
+        config: Option<ROQueryItem<'w, '_, Self::ItemQuery>>,
         line_gizmos: SystemParamItem<'w, '_, Self::Param>,
         pass: &mut TrackedRenderPass<'w>,
     ) -> RenderCommandResult {

crates/bevy_gltf/src/convert_coordinates.rs

@@ -0,0 +1,80 @@
+use core::f32::consts::PI;
+
+use bevy_math::{Mat4, Quat, Vec3};
+use bevy_transform::components::Transform;
+
+pub(crate) trait ConvertCoordinates {
+    /// Converts the glTF coordinates to Bevy's coordinate system.
+    /// - glTF:
+    ///   - forward: Z
+    ///   - up: Y
+    ///   - right: -X
+    /// - Bevy:
+    ///   - forward: -Z
+    ///   - up: Y
+    ///   - right: X
+    ///
+    /// See <https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#coordinate-system-and-units>
+    fn convert_coordinates(self) -> Self;
+}
+
+pub(crate) trait ConvertCameraCoordinates {
+    /// Like `convert_coordinates`, but uses the following for the lens rotation:
+    /// - forward: -Z
+    /// - up: Y
+    /// - right: X
+    ///
+    /// See <https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#view-matrix>
+    fn convert_camera_coordinates(self) -> Self;
+}
+
+impl ConvertCoordinates for Vec3 {
+    fn convert_coordinates(self) -> Self {
+        Vec3::new(-self.x, self.y, -self.z)
+    }
+}
+
+impl ConvertCoordinates for [f32; 3] {
+    fn convert_coordinates(self) -> Self {
+        [-self[0], self[1], -self[2]]
+    }
+}
+
+impl ConvertCoordinates for [f32; 4] {
+    fn convert_coordinates(self) -> Self {
+        // Solution of q' = r q r*
+        [-self[0], self[1], -self[2], self[3]]
+    }
+}
+
+impl ConvertCoordinates for Quat {
+    fn convert_coordinates(self) -> Self {
+        // Solution of q' = r q r*
+        Quat::from_array([-self.x, self.y, -self.z, self.w])
+    }
+}
+
+impl ConvertCoordinates for Mat4 {
+    fn convert_coordinates(self) -> Self {
+        let m: Mat4 = Mat4::from_scale(Vec3::new(-1.0, 1.0, -1.0));
+        // Same as the original matrix
+        let m_inv = m;
+        m_inv * self * m
+    }
+}
+
+impl ConvertCoordinates for Transform {
+    fn convert_coordinates(mut self) -> Self {
+        self.translation = self.translation.convert_coordinates();
+        self.rotation = self.rotation.convert_coordinates();
+        self
+    }
+}
+
+impl ConvertCameraCoordinates for Transform {
+    fn convert_camera_coordinates(mut self) -> Self {
+        self.translation = self.translation.convert_coordinates();
+        self.rotate_y(PI);
+        self
+    }
+}

crates/bevy_gltf/src/lib.rs

@@ -91,6 +91,7 @@
 //! You can use [`GltfAssetLabel`] to ensure you are using the correct label.
 
 mod assets;
+mod convert_coordinates;
 mod label;
 mod loader;
 mod vertex_attributes;

crates/bevy_gltf/src/loader/gltf_ext/scene.rs

@@ -10,7 +10,10 @@ use itertools::Itertools;
 #[cfg(feature = "bevy_animation")]
 use bevy_platform::collections::{HashMap, HashSet};
 
-use crate::GltfError;
+use crate::{
+    convert_coordinates::{ConvertCameraCoordinates as _, ConvertCoordinates as _},
+    GltfError,
+};
 
 pub(crate) fn node_name(node: &Node) -> Name {
     let name = node
@@ -26,8 +29,8 @@ pub(crate) fn node_name(node: &Node) -> Name {
 /// on [`Node::transform()`](gltf::Node::transform) directly because it uses optimized glam types and
 /// if `libm` feature of `bevy_math` crate is enabled also handles cross
 /// platform determinism properly.
-pub(crate) fn node_transform(node: &Node) -> Transform {
+pub(crate) fn node_transform(node: &Node, convert_coordinates: bool) -> Transform {
-    match node.transform() {
+    let transform = match node.transform() {
         gltf::scene::Transform::Matrix { matrix } => {
             Transform::from_matrix(Mat4::from_cols_array_2d(&matrix))
         }
@@ -40,6 +43,15 @@ pub(crate) fn node_transform(node: &Node) -> Transform {
             rotation: bevy_math::Quat::from_array(rotation),
             scale: Vec3::from(scale),
         },
+    };
+    if convert_coordinates {
+        if node.camera().is_some() {
+            transform.convert_camera_coordinates()
+        } else {
+            transform.convert_coordinates()
+        }
+    } else {
+        transform
     }
 }
 

crates/bevy_gltf/src/loader/mod.rs

@@ -84,6 +84,7 @@ use self::{
         texture::{texture_handle, texture_sampler, texture_transform_to_affine2},
     },
 };
+use crate::convert_coordinates::ConvertCoordinates as _;
 
 /// An error that occurs when loading a glTF file.
 #[derive(Error, Debug)]
@@ -191,6 +192,16 @@ pub struct GltfLoaderSettings {
     pub default_sampler: Option<ImageSamplerDescriptor>,
     /// If true, the loader will ignore sampler data from gltf and use the default sampler.
     pub override_sampler: bool,
+    /// If true, the loader will convert glTF coordinates to Bevy's coordinate system.
+    /// - glTF:
+    ///   - forward: Z
+    ///   - up: Y
+    ///   - right: -X
+    /// - Bevy:
+    ///   - forward: -Z
+    ///   - up: Y
+    ///   - right: X
+    pub convert_coordinates: bool,
 }
 
 impl Default for GltfLoaderSettings {
@@ -203,6 +214,7 @@ impl Default for GltfLoaderSettings {
             include_source: false,
             default_sampler: None,
             override_sampler: false,
+            convert_coordinates: false,
         }
     }
 }
@@ -303,7 +315,16 @@ async fn load_gltf<'a, 'b, 'c>(
                     match outputs {
                         ReadOutputs::Translations(tr) => {
                             let translation_property = animated_field!(Transform::translation);
-                            let translations: Vec<Vec3> = tr.map(Vec3::from).collect();
+                            let translations: Vec<Vec3> = tr
+                                .map(Vec3::from)
+                                .map(|verts| {
+                                    if settings.convert_coordinates {
+                                        Vec3::convert_coordinates(verts)
+                                    } else {
+                                        verts
+                                    }
+                                })
+                                .collect();
                             if keyframe_timestamps.len() == 1 {
                                 Some(VariableCurve::new(AnimatableCurve::new(
                                     translation_property,
@@ -350,8 +371,17 @@ async fn load_gltf<'a, 'b, 'c>(
                         }
                         ReadOutputs::Rotations(rots) => {
                             let rotation_property = animated_field!(Transform::rotation);
-                            let rotations: Vec<Quat> =
+                            let rotations: Vec<Quat> = rots
-                                rots.into_f32().map(Quat::from_array).collect();
+                                .into_f32()
+                                .map(Quat::from_array)
+                                .map(|quat| {
+                                    if settings.convert_coordinates {
+                                        Quat::convert_coordinates(quat)
+                                    } else {
+                                        quat
+                                    }
+                                })
+                                .collect();
                             if keyframe_timestamps.len() == 1 {
                                 Some(VariableCurve::new(AnimatableCurve::new(
                                     rotation_property,
@@ -633,6 +663,7 @@ async fn load_gltf<'a, 'b, 'c>(
                     accessor,
                     &buffer_data,
                     &loader.custom_vertex_attributes,
+                    settings.convert_coordinates,
                 ) {
                     Ok((attribute, values)) => mesh.insert_attribute(attribute, values),
                     Err(err) => warn!("{}", err),
@@ -752,7 +783,17 @@ async fn load_gltf<'a, 'b, 'c>(
             let reader = gltf_skin.reader(|buffer| Some(&buffer_data[buffer.index()]));
             let local_to_bone_bind_matrices: Vec<Mat4> = reader
                 .read_inverse_bind_matrices()
-                .map(|mats| mats.map(|mat| Mat4::from_cols_array_2d(&mat)).collect())
+                .map(|mats| {
+                    mats.map(|mat| Mat4::from_cols_array_2d(&mat))
+                        .map(|mat| {
+                            if settings.convert_coordinates {
+                                mat.convert_coordinates()
+                            } else {
+                                mat
+                            }
+                        })
+                        .collect()
+                })
                 .unwrap_or_else(|| {
                     core::iter::repeat_n(Mat4::IDENTITY, gltf_skin.joints().len()).collect()
                 });
@@ -834,7 +875,7 @@ async fn load_gltf<'a, 'b, 'c>(
             &node,
             children,
             mesh,
-            node_transform(&node),
+            node_transform(&node, settings.convert_coordinates),
             skin,
             node.extras().as_deref().map(GltfExtras::from),
         );
@@ -1306,7 +1347,7 @@ fn load_node(
     document: &Document,
 ) -> Result<(), GltfError> {
     let mut gltf_error = None;
-    let transform = node_transform(gltf_node);
+    let transform = node_transform(gltf_node, settings.convert_coordinates);
     let world_transform = *parent_transform * transform;
     // according to https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#instantiation,
     // if the determinant of the transform is negative we must invert the winding order of
@@ -1359,7 +1400,6 @@ fn load_node(
                         },
                         ..OrthographicProjection::default_3d()
                     };
-
                     Projection::Orthographic(orthographic_projection)
                 }
                 gltf::camera::Projection::Perspective(perspective) => {
@@ -1377,6 +1417,7 @@ fn load_node(
                     Projection::Perspective(perspective_projection)
                 }
             };
+
             node.insert((
                 Camera3d::default(),
                 projection,

crates/bevy_gltf/src/vertex_attributes.rs

@@ -6,6 +6,8 @@ use gltf::{
 };
 use thiserror::Error;
 
+use crate::convert_coordinates::ConvertCoordinates;
+
 /// Represents whether integer data requires normalization
 #[derive(Copy, Clone)]
 struct Normalization(bool);
@@ -132,15 +134,23 @@ impl<'a> VertexAttributeIter<'a> {
     }
 
     /// Materializes values for any supported format of vertex attribute
-    fn into_any_values(self) -> Result<Values, AccessFailed> {
+    fn into_any_values(self, convert_coordinates: bool) -> Result<Values, AccessFailed> {
         match self {
             VertexAttributeIter::F32(it) => Ok(Values::Float32(it.collect())),
             VertexAttributeIter::U32(it) => Ok(Values::Uint32(it.collect())),
             VertexAttributeIter::F32x2(it) => Ok(Values::Float32x2(it.collect())),
             VertexAttributeIter::U32x2(it) => Ok(Values::Uint32x2(it.collect())),
-            VertexAttributeIter::F32x3(it) => Ok(Values::Float32x3(it.collect())),
+            VertexAttributeIter::F32x3(it) => Ok(if convert_coordinates {
+                Values::Float32x3(it.map(ConvertCoordinates::convert_coordinates).collect())
+            } else {
+                Values::Float32x3(it.collect())
+            }),
             VertexAttributeIter::U32x3(it) => Ok(Values::Uint32x3(it.collect())),
-            VertexAttributeIter::F32x4(it) => Ok(Values::Float32x4(it.collect())),
+            VertexAttributeIter::F32x4(it) => Ok(if convert_coordinates {
+                Values::Float32x4(it.map(ConvertCoordinates::convert_coordinates).collect())
+            } else {
+                Values::Float32x4(it.collect())
+            }),
             VertexAttributeIter::U32x4(it) => Ok(Values::Uint32x4(it.collect())),
             VertexAttributeIter::S16x2(it, n) => {
                 Ok(n.apply_either(it.collect(), Values::Snorm16x2, Values::Sint16x2))
@@ -188,7 +198,7 @@ impl<'a> VertexAttributeIter<'a> {
             VertexAttributeIter::U16x4(it, Normalization(true)) => Ok(Values::Float32x4(
                 ReadColors::RgbaU16(it).into_rgba_f32().collect(),
             )),
-            s => s.into_any_values(),
+            s => s.into_any_values(false),
         }
     }
 
@@ -198,7 +208,7 @@ impl<'a> VertexAttributeIter<'a> {
             VertexAttributeIter::U8x4(it, Normalization(false)) => {
                 Ok(Values::Uint16x4(ReadJoints::U8(it).into_u16().collect()))
             }
-            s => s.into_any_values(),
+            s => s.into_any_values(false),
         }
     }
 
@@ -211,7 +221,7 @@ impl<'a> VertexAttributeIter<'a> {
             VertexAttributeIter::U16x4(it, Normalization(true)) => {
                 Ok(Values::Float32x4(ReadWeights::U16(it).into_f32().collect()))
             }
-            s => s.into_any_values(),
+            s => s.into_any_values(false),
         }
     }
 
@@ -224,7 +234,7 @@ impl<'a> VertexAttributeIter<'a> {
             VertexAttributeIter::U16x2(it, Normalization(true)) => Ok(Values::Float32x2(
                 ReadTexCoords::U16(it).into_f32().collect(),
             )),
-            s => s.into_any_values(),
+            s => s.into_any_values(false),
         }
     }
 }
@@ -252,28 +262,49 @@ pub(crate) fn convert_attribute(
     accessor: gltf::Accessor,
     buffer_data: &Vec<Vec<u8>>,
     custom_vertex_attributes: &HashMap<Box<str>, MeshVertexAttribute>,
+    convert_coordinates: bool,
 ) -> Result<(MeshVertexAttribute, Values), ConvertAttributeError> {
-    if let Some((attribute, conversion)) = match &semantic {
+    if let Some((attribute, conversion, convert_coordinates)) = match &semantic {
-        gltf::Semantic::Positions => Some((Mesh::ATTRIBUTE_POSITION, ConversionMode::Any)),
+        gltf::Semantic::Positions => Some((
-        gltf::Semantic::Normals => Some((Mesh::ATTRIBUTE_NORMAL, ConversionMode::Any)),
+            Mesh::ATTRIBUTE_POSITION,
-        gltf::Semantic::Tangents => Some((Mesh::ATTRIBUTE_TANGENT, ConversionMode::Any)),
+            ConversionMode::Any,
-        gltf::Semantic::Colors(0) => Some((Mesh::ATTRIBUTE_COLOR, ConversionMode::Rgba)),
+            convert_coordinates,
-        gltf::Semantic::TexCoords(0) => Some((Mesh::ATTRIBUTE_UV_0, ConversionMode::TexCoord)),
+        )),
-        gltf::Semantic::TexCoords(1) => Some((Mesh::ATTRIBUTE_UV_1, ConversionMode::TexCoord)),
+        gltf::Semantic::Normals => Some((
-        gltf::Semantic::Joints(0) => {
+            Mesh::ATTRIBUTE_NORMAL,
-            Some((Mesh::ATTRIBUTE_JOINT_INDEX, ConversionMode::JointIndex))
+            ConversionMode::Any,
+            convert_coordinates,
+        )),
+        gltf::Semantic::Tangents => Some((
+            Mesh::ATTRIBUTE_TANGENT,
+            ConversionMode::Any,
+            convert_coordinates,
+        )),
+        gltf::Semantic::Colors(0) => Some((Mesh::ATTRIBUTE_COLOR, ConversionMode::Rgba, false)),
+        gltf::Semantic::TexCoords(0) => {
+            Some((Mesh::ATTRIBUTE_UV_0, ConversionMode::TexCoord, false))
         }
-        gltf::Semantic::Weights(0) => {
+        gltf::Semantic::TexCoords(1) => {
-            Some((Mesh::ATTRIBUTE_JOINT_WEIGHT, ConversionMode::JointWeight))
+            Some((Mesh::ATTRIBUTE_UV_1, ConversionMode::TexCoord, false))
         }
+        gltf::Semantic::Joints(0) => Some((
+            Mesh::ATTRIBUTE_JOINT_INDEX,
+            ConversionMode::JointIndex,
+            false,
+        )),
+        gltf::Semantic::Weights(0) => Some((
+            Mesh::ATTRIBUTE_JOINT_WEIGHT,
+            ConversionMode::JointWeight,
+            false,
+        )),
         gltf::Semantic::Extras(name) => custom_vertex_attributes
             .get(name.as_str())
-            .map(|attr| (*attr, ConversionMode::Any)),
+            .map(|attr| (*attr, ConversionMode::Any, false)),
         _ => None,
     } {
         let raw_iter = VertexAttributeIter::from_accessor(accessor.clone(), buffer_data);
         let converted_values = raw_iter.and_then(|iter| match conversion {
-            ConversionMode::Any => iter.into_any_values(),
+            ConversionMode::Any => iter.into_any_values(convert_coordinates),
             ConversionMode::Rgba => iter.into_rgba_values(),
             ConversionMode::TexCoord => iter.into_tex_coord_values(),
             ConversionMode::JointIndex => iter.into_joint_index_values(),

crates/bevy_input/src/button_input.rs

@@ -122,7 +122,7 @@ use {
 /// [`DetectChangesMut::bypass_change_detection`]: bevy_ecs::change_detection::DetectChangesMut::bypass_change_detection
 #[derive(Debug, Clone, Resource)]
 #[cfg_attr(feature = "bevy_reflect", derive(Reflect), reflect(Default, Resource))]
-pub struct ButtonInput<T: Copy + Eq + Hash + Send + Sync + 'static> {
+pub struct ButtonInput<T: Clone + Eq + Hash + Send + Sync + 'static> {
     /// A collection of every button that is currently being pressed.
     pressed: HashSet<T>,
     /// A collection of every button that has just been pressed.
@@ -131,7 +131,7 @@ pub struct ButtonInput<T: Copy + Eq + Hash + Send + Sync + 'static> {
     just_released: HashSet<T>,
 }
 
-impl<T: Copy + Eq + Hash + Send + Sync + 'static> Default for ButtonInput<T> {
+impl<T: Clone + Eq + Hash + Send + Sync + 'static> Default for ButtonInput<T> {
     fn default() -> Self {
         Self {
             pressed: Default::default(),
@@ -143,12 +143,12 @@ impl<T: Copy + Eq + Hash + Send + Sync + 'static> Default for ButtonInput<T> {
 
 impl<T> ButtonInput<T>
 where
-    T: Copy + Eq + Hash + Send + Sync + 'static,
+    T: Clone + Eq + Hash + Send + Sync + 'static,
 {
     /// Registers a press for the given `input`.
     pub fn press(&mut self, input: T) {
         // Returns `true` if the `input` wasn't pressed.
-        if self.pressed.insert(input) {
+        if self.pressed.insert(input.clone()) {
             self.just_pressed.insert(input);
         }
     }

crates/bevy_input/src/keyboard.rs

@@ -92,8 +92,9 @@ use bevy_reflect::{ReflectDeserialize, ReflectSerialize};
 ///
 /// ## Usage
 ///
-/// The event is consumed inside of the [`keyboard_input_system`]
+/// The event is consumed inside of the [`keyboard_input_system`] to update the
-/// to update the [`ButtonInput<KeyCode>`](ButtonInput<KeyCode>) resource.
+/// [`ButtonInput<KeyCode>`](ButtonInput<KeyCode>) and
+/// [`ButtonInput<Key>`](ButtonInput<Key>) resources.
 #[derive(Event, BufferedEvent, Debug, Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(
     feature = "bevy_reflect",
@@ -107,8 +108,12 @@ use bevy_reflect::{ReflectDeserialize, ReflectSerialize};
 )]
 pub struct KeyboardInput {
     /// The physical key code of the key.
+    ///
+    /// This corresponds to the location of the key independent of the keyboard layout.
     pub key_code: KeyCode,
-    /// The logical key of the input
+    /// The logical key of the input.
+    ///
+    /// This corresponds to the actual key taking keyboard layout into account.
     pub logical_key: Key,
     /// The press state of the key.
     pub state: ButtonState,
@@ -148,32 +153,46 @@ pub struct KeyboardInput {
 )]
 pub struct KeyboardFocusLost;
 
-/// Updates the [`ButtonInput<KeyCode>`] resource with the latest [`KeyboardInput`] events.
+/// Updates the [`ButtonInput<KeyCode>`] and [`ButtonInput<Key>`] resources with the latest [`KeyboardInput`] events.
 ///
 /// ## Differences
 ///
-/// The main difference between the [`KeyboardInput`] event and the [`ButtonInput<KeyCode>`] resources is that
+/// The main difference between the [`KeyboardInput`] event and the [`ButtonInput`] resources are that
 /// the latter has convenient functions such as [`ButtonInput::pressed`], [`ButtonInput::just_pressed`] and [`ButtonInput::just_released`] and is window id agnostic.
+///
+/// There is a [`ButtonInput`] for both [`KeyCode`] and [`Key`] as they are both useful in different situations, see their documentation for the details.
 pub fn keyboard_input_system(
-    mut key_input: ResMut<ButtonInput<KeyCode>>,
+    mut keycode_input: ResMut<ButtonInput<KeyCode>>,
+    mut key_input: ResMut<ButtonInput<Key>>,
     mut keyboard_input_events: EventReader<KeyboardInput>,
     mut focus_events: EventReader<KeyboardFocusLost>,
 ) {
-    // Avoid clearing if it's not empty to ensure change detection is not triggered.
+    // Avoid clearing if not empty to ensure change detection is not triggered.
+    keycode_input.bypass_change_detection().clear();
     key_input.bypass_change_detection().clear();
+
     for event in keyboard_input_events.read() {
         let KeyboardInput {
-            key_code, state, ..
+            key_code,
+            logical_key,
+            state,
+            ..
         } = event;
         match state {
-            ButtonState::Pressed => key_input.press(*key_code),
+            ButtonState::Pressed => {
-            ButtonState::Released => key_input.release(*key_code),
+                keycode_input.press(*key_code);
+                key_input.press(logical_key.clone());
+            }
+            ButtonState::Released => {
+                keycode_input.release(*key_code);
+                key_input.release(logical_key.clone());
+            }
         }
     }
 
     // Release all cached input to avoid having stuck input when switching between windows in os
     if !focus_events.is_empty() {
-        key_input.release_all();
+        keycode_input.release_all();
         focus_events.clear();
     }
 }
@@ -220,13 +239,13 @@ pub enum NativeKeyCode {
 /// It is used as the generic `T` value of an [`ButtonInput`] to create a `Res<ButtonInput<KeyCode>>`.
 ///
 /// Code representing the location of a physical key
-/// This mostly conforms to the UI Events Specification's [`KeyboardEvent.code`] with a few
+/// This mostly conforms to the [`UI Events Specification's KeyboardEvent.code`] with a few
 /// exceptions:
 /// - The keys that the specification calls `MetaLeft` and `MetaRight` are named `SuperLeft` and
 ///   `SuperRight` here.
 /// - The key that the specification calls "Super" is reported as `Unidentified` here.
 ///
-/// [`KeyboardEvent.code`]: https://w3c.github.io/uievents-code/#code-value-tables
+/// [`UI Events Specification's KeyboardEvent.code`]: https://w3c.github.io/uievents-code/#code-value-tables
 ///
 /// ## Updating
 ///
@@ -756,6 +775,19 @@ pub enum NativeKey {
 
 /// The logical key code of a [`KeyboardInput`].
 ///
+/// This contains the actual value that is produced by pressing the key. This is
+/// useful when you need the actual letters, and for symbols like `+` and `-`
+/// when implementing zoom, as they can be in different locations depending on
+/// the keyboard layout.
+///
+/// In many cases you want the key location instead, for example when
+/// implementing WASD controls so the keys are located the same place on QWERTY
+/// and other layouts. In that case use [`KeyCode`] instead.
+///
+/// ## Usage
+///
+/// It is used as the generic `T` value of an [`ButtonInput`] to create a `Res<ButtonInput<Key>>`.
+///
 /// ## Technical
 ///
 /// Its values map 1 to 1 to winit's Key.

crates/bevy_input/src/lib.rs

@@ -49,7 +49,7 @@ use bevy_ecs::prelude::*;
 #[cfg(feature = "bevy_reflect")]
 use bevy_reflect::Reflect;
 use gestures::*;
-use keyboard::{keyboard_input_system, KeyCode, KeyboardFocusLost, KeyboardInput};
+use keyboard::{keyboard_input_system, Key, KeyCode, KeyboardFocusLost, KeyboardInput};
 use mouse::{
     accumulate_mouse_motion_system, accumulate_mouse_scroll_system, mouse_button_input_system,
     AccumulatedMouseMotion, AccumulatedMouseScroll, MouseButton, MouseButtonInput, MouseMotion,
@@ -89,6 +89,7 @@ impl Plugin for InputPlugin {
             .add_event::<KeyboardInput>()
             .add_event::<KeyboardFocusLost>()
             .init_resource::<ButtonInput<KeyCode>>()
+            .init_resource::<ButtonInput<Key>>()
             .add_systems(PreUpdate, keyboard_input_system.in_set(InputSystems))
             // mouse
             .add_event::<MouseButtonInput>()

crates/bevy_input_focus/src/lib.rs

@@ -155,7 +155,7 @@ pub struct WindowTraversal {
 }
 
 impl<E: BufferedEvent + Clone> Traversal<FocusedInput<E>> for WindowTraversal {
-    fn traverse(item: Self::Item<'_>, event: &FocusedInput<E>) -> Option<Entity> {
+    fn traverse(item: Self::Item<'_, '_>, event: &FocusedInput<E>) -> Option<Entity> {
         let WindowTraversalItem { child_of, window } = item;
 
         // Send event to parent, if it has one.

crates/bevy_internal/Cargo.toml

@@ -346,6 +346,8 @@ web = [
 
 hotpatching = ["bevy_app/hotpatching", "bevy_ecs/hotpatching"]
 
+debug = ["bevy_utils/debug"]
+
 [dependencies]
 # bevy (no_std)
 bevy_app = { path = "../bevy_app", version = "0.16.0-dev", default-features = false, features = [

crates/bevy_pbr/src/atmosphere/mod.rs

@@ -309,7 +309,7 @@ impl ExtractComponent for Atmosphere {
 
     type Out = Atmosphere;
 
-    fn extract_component(item: QueryItem<'_, Self::QueryData>) -> Option<Self::Out> {
+    fn extract_component(item: QueryItem<'_, '_, Self::QueryData>) -> Option<Self::Out> {
         Some(item.clone())
     }
 }
@@ -405,7 +405,7 @@ impl ExtractComponent for AtmosphereSettings {
 
     type Out = AtmosphereSettings;
 
-    fn extract_component(item: QueryItem<'_, Self::QueryData>) -> Option<Self::Out> {
+    fn extract_component(item: QueryItem<'_, '_, Self::QueryData>) -> Option<Self::Out> {
         Some(item.clone())
     }
 }

crates/bevy_pbr/src/atmosphere/node.rs

@@ -181,7 +181,7 @@ impl ViewNode for RenderSkyNode {
             view_uniforms_offset,
             lights_uniforms_offset,
             render_sky_pipeline_id,
-        ): QueryItem<'w, Self::ViewQuery>,
+        ): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let pipeline_cache = world.resource::<PipelineCache>();

crates/bevy_pbr/src/atmosphere/resources.rs

@@ -560,7 +560,7 @@ pub(super) fn prepare_atmosphere_transforms(
     };
 
     for (entity, view) in &views {
-        let world_from_view = view.world_from_view.compute_matrix();
+        let world_from_view = view.world_from_view.to_matrix();
         let camera_z = world_from_view.z_axis.truncate();
         let camera_y = world_from_view.y_axis.truncate();
         let atmo_z = camera_z

crates/bevy_pbr/src/cluster/assign.rs

@@ -353,7 +353,7 @@ pub(crate) fn assign_objects_to_clusters(
 
         let mut requested_cluster_dimensions = config.dimensions_for_screen_size(screen_size);
 
-        let world_from_view = camera_transform.compute_matrix();
+        let world_from_view = camera_transform.to_matrix();
         let view_from_world_scale = camera_transform.compute_transform().scale.recip();
         let view_from_world_scale_max = view_from_world_scale.abs().max_element();
         let view_from_world = world_from_view.inverse();

crates/bevy_pbr/src/light/mod.rs

@@ -341,7 +341,7 @@ pub fn build_directional_light_cascades(
         .iter()
         .filter_map(|(entity, transform, projection, camera)| {
             if camera.is_active {
-                Some((entity, projection, transform.compute_matrix()))
+                Some((entity, projection, transform.to_matrix()))
             } else {
                 None
             }
@@ -357,7 +357,7 @@ pub fn build_directional_light_cascades(
         // light_to_world has orthogonal upper-left 3x3 and zero translation.
         // Even though only the direction (i.e. rotation) of the light matters, we don't constrain
         // users to not change any other aspects of the transform - there's no guarantee
-        // `transform.compute_matrix()` will give us a matrix with our desired properties.
+        // `transform.to_matrix()` will give us a matrix with our desired properties.
         // Instead, we directly create a good matrix from just the rotation.
         let world_from_light = Mat4::from_quat(transform.compute_transform().rotation);
         let light_to_world_inverse = world_from_light.inverse();
@@ -628,7 +628,7 @@ pub fn update_point_light_frusta(
 
         for (view_rotation, frustum) in view_rotations.iter().zip(cubemap_frusta.iter_mut()) {
             let world_from_view = view_translation * *view_rotation;
-            let clip_from_world = clip_from_view * world_from_view.compute_matrix().inverse();
+            let clip_from_world = clip_from_view * world_from_view.to_matrix().inverse();
 
             *frustum = Frustum::from_clip_from_world_custom_far(
                 &clip_from_world,

crates/bevy_pbr/src/light_probe/environment_map.rs

@@ -192,7 +192,7 @@ impl ExtractInstance for EnvironmentMapIds {
 
     type QueryFilter = ();
 
-    fn extract(item: QueryItem<'_, Self::QueryData>) -> Option<Self> {
+    fn extract(item: QueryItem<'_, '_, Self::QueryData>) -> Option<Self> {
         Some(EnvironmentMapIds {
             diffuse: item.diffuse_map.id(),
             specular: item.specular_map.id(),

crates/bevy_pbr/src/light_probe/mod.rs

@@ -378,7 +378,7 @@ fn gather_environment_map_uniform(
         let environment_map_uniform = if let Some(environment_map_light) = environment_map_light {
             EnvironmentMapUniform {
                 transform: Transform::from_rotation(environment_map_light.rotation)
-                    .compute_matrix()
+                    .to_matrix()
                     .inverse(),
             }
         } else {
@@ -595,7 +595,7 @@ where
     ) -> Option<LightProbeInfo<C>> {
         environment_map.id(image_assets).map(|id| LightProbeInfo {
             world_from_light: light_probe_transform.affine(),
-            light_from_world: light_probe_transform.compute_matrix().inverse(),
+            light_from_world: light_probe_transform.to_matrix().inverse(),
             asset_id: id,
             intensity: environment_map.intensity(),
             affects_lightmapped_mesh_diffuse: environment_map.affects_lightmapped_mesh_diffuse(),

crates/bevy_pbr/src/prepass/mod.rs

@@ -216,7 +216,7 @@ pub fn update_previous_view_data(
     query: Query<(Entity, &Camera, &GlobalTransform), Or<(With<Camera3d>, With<ShadowView>)>>,
 ) {
     for (entity, camera, camera_transform) in &query {
-        let world_from_view = camera_transform.compute_matrix();
+        let world_from_view = camera_transform.to_matrix();
         let view_from_world = world_from_view.inverse();
         let view_from_clip = camera.clip_from_view().inverse();
 
@@ -703,7 +703,7 @@ pub fn prepare_previous_view_uniforms(
         let prev_view_data = match maybe_previous_view_uniforms {
             Some(previous_view) => previous_view.clone(),
             None => {
-                let world_from_view = camera.world_from_view.compute_matrix();
+                let world_from_view = camera.world_from_view.to_matrix();
                 let view_from_world = world_from_view.inverse();
                 let view_from_clip = camera.clip_from_view.inverse();
 

crates/bevy_pbr/src/render/mesh.rs

@@ -1540,7 +1540,7 @@ fn extract_mesh_for_gpu_building(
         not_shadow_caster,
         no_automatic_batching,
         visibility_range,
-    ): <GpuMeshExtractionQuery as QueryData>::Item<'_>,
+    ): <GpuMeshExtractionQuery as QueryData>::Item<'_, '_>,
     render_visibility_ranges: &RenderVisibilityRanges,
     render_mesh_instances: &RenderMeshInstancesGpu,
     queue: &mut RenderMeshInstanceGpuQueue,
@@ -2874,7 +2874,7 @@ impl<P: PhaseItem, const I: usize> RenderCommand<P> for SetMeshViewBindGroup<I>
             view_environment_map,
             mesh_view_bind_group,
             maybe_oit_layers_count_offset,
-        ): ROQueryItem<'w, Self::ViewQuery>,
+        ): ROQueryItem<'w, '_, Self::ViewQuery>,
         _entity: Option<()>,
         _: SystemParamItem<'w, '_, Self::Param>,
         pass: &mut TrackedRenderPass<'w>,

crates/bevy_pbr/src/ssr/mod.rs

@@ -280,7 +280,7 @@ impl ViewNode for ScreenSpaceReflectionsNode {
             view_environment_map_offset,
             view_bind_group,
             ssr_pipeline_id,
-        ): QueryItem<'w, Self::ViewQuery>,
+        ): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         // Grab the render pipeline.
@@ -498,7 +498,7 @@ impl ExtractComponent for ScreenSpaceReflections {
 
     type Out = ScreenSpaceReflectionsUniform;
 
-    fn extract_component(settings: QueryItem<'_, Self::QueryData>) -> Option<Self::Out> {
+    fn extract_component(settings: QueryItem<'_, '_, Self::QueryData>) -> Option<Self::Out> {
         if !DEPTH_TEXTURE_SAMPLING_SUPPORTED {
             once!(info!(
                 "Disabling screen-space reflections on this platform because depth textures \

crates/bevy_pbr/src/volumetric_fog/render.rs

@@ -347,7 +347,7 @@ impl ViewNode for VolumetricFogNode {
             view_ssr_offset,
             msaa,
             view_environment_map_offset,
-        ): QueryItem<'w, Self::ViewQuery>,
+        ): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let pipeline_cache = world.resource::<PipelineCache>();
@@ -700,7 +700,7 @@ pub fn prepare_volumetric_fog_uniforms(
     // Do this up front to avoid O(n^2) matrix inversion.
     local_from_world_matrices.clear();
     for (_, _, fog_transform) in fog_volumes.iter() {
-        local_from_world_matrices.push(fog_transform.compute_matrix().inverse());
+        local_from_world_matrices.push(fog_transform.to_matrix().inverse());
     }
 
     let uniform_count = view_targets.iter().len() * local_from_world_matrices.len();
@@ -712,7 +712,7 @@ pub fn prepare_volumetric_fog_uniforms(
     };
 
     for (view_entity, extracted_view, volumetric_fog) in view_targets.iter() {
-        let world_from_view = extracted_view.world_from_view.compute_matrix();
+        let world_from_view = extracted_view.world_from_view.to_matrix();
 
         let mut view_fog_volumes = vec![];
 

crates/bevy_pbr/src/wireframe.rs

@@ -374,7 +374,7 @@ impl ViewNode for Wireframe3dNode {
         &self,
         graph: &mut RenderGraphContext,
         render_context: &mut RenderContext<'w>,
-        (camera, view, target, depth): QueryItem<'w, Self::ViewQuery>,
+        (camera, view, target, depth): QueryItem<'w, '_, Self::ViewQuery>,
         world: &'w World,
     ) -> Result<(), NodeRunError> {
         let Some(wireframe_phase) = world.get_resource::<ViewBinnedRenderPhases<Wireframe3d>>()

crates/bevy_picking/src/events.rs

@@ -86,7 +86,7 @@ impl<E> Traversal<Pointer<E>> for PointerTraversal
 where
     E: Debug + Clone + Reflect,
 {
-    fn traverse(item: Self::Item<'_>, pointer: &Pointer<E>) -> Option<Entity> {
+    fn traverse(item: Self::Item<'_, '_>, pointer: &Pointer<E>) -> Option<Entity> {
         let PointerTraversalItem { child_of, window } = item;
 
         // Send event to parent, if it has one.