clippy: expect large variants and other small fixes (#19222)

# Objective

- Fix CI

## Solution

- Expect new lint
- See #19220

## Testing

- cargo clippy

crates/bevy_ecs/src/change_detection.rs

@@ -1847,8 +1847,7 @@ mod tests {
 
         let mut new = value.map_unchanged(|ptr| {
             // SAFETY: The underlying type of `ptr` matches `reflect_from_ptr`.
-            let value = unsafe { reflect_from_ptr.as_reflect_mut(ptr) };
-            value
+            unsafe { reflect_from_ptr.as_reflect_mut(ptr) }
         });
 
         assert!(!new.is_changed());

crates/bevy_render/src/batching/gpu_preprocessing.rs

@@ -392,6 +392,10 @@ where
 }
 
 /// The buffer of GPU preprocessing work items for a single view.
+#[expect(
+    clippy::large_enum_variant,
+    reason = "See https://github.com/bevyengine/bevy/issues/19220"
+)]
 pub enum PreprocessWorkItemBuffers {
     /// The work items we use if we aren't using indirect drawing.
     ///

crates/bevy_render/src/mesh/allocator.rs

@@ -158,6 +158,10 @@ pub struct MeshBufferSlice<'a> {
 pub struct SlabId(pub NonMaxU32);
 
 /// Data for a single slab.
+#[expect(
+    clippy::large_enum_variant,
+    reason = "See https://github.com/bevyengine/bevy/issues/19220"
+)]
 enum Slab {
     /// A slab that can contain multiple objects.
     General(GeneralSlab),

crates/bevy_render/src/render_resource/pipeline_cache.rs

@@ -80,6 +80,10 @@ pub struct CachedPipeline {
 }
 
 /// State of a cached pipeline inserted into a [`PipelineCache`].
+#[expect(
+    clippy::large_enum_variant,
+    reason = "See https://github.com/bevyengine/bevy/issues/19220"
+)]
 #[derive(Debug)]
 pub enum CachedPipelineState {
     /// The pipeline GPU object is queued for creation.
@@ -189,6 +193,10 @@ impl ShaderCache {
         }
     }
 
+    #[expect(
+        clippy::result_large_err,
+        reason = "See https://github.com/bevyengine/bevy/issues/19220"
+    )]
     fn add_import_to_composer(
         composer: &mut naga_oil::compose::Composer,
         import_path_shaders: &HashMap<ShaderImport, AssetId<Shader>>,
@@ -216,6 +224,10 @@ impl ShaderCache {
         Ok(())
     }
 
+    #[expect(
+        clippy::result_large_err,
+        reason = "See https://github.com/bevyengine/bevy/issues/19220"
+    )]
     fn get(
         &mut self,
         render_device: &RenderDevice,
@@ -1090,6 +1102,10 @@ fn create_pipeline_task(
     target_os = "macos",
     not(feature = "multi_threaded")
 ))]
+#[expect(
+    clippy::large_enum_variant,
+    reason = "See https://github.com/bevyengine/bevy/issues/19220"
+)]
 fn create_pipeline_task(
     task: impl Future<Output = Result<Pipeline, PipelineCacheError>> + Send + 'static,
     _sync: bool,
@@ -1101,6 +1117,10 @@ fn create_pipeline_task(
 }
 
 /// Type of error returned by a [`PipelineCache`] when the creation of a GPU pipeline object failed.
+#[expect(
+    clippy::large_enum_variant,
+    reason = "See https://github.com/bevyengine/bevy/issues/19220"
+)]
 #[derive(Error, Debug)]
 pub enum PipelineCacheError {
     #[error(

crates/bevy_render/src/settings.rs

@@ -152,6 +152,10 @@ pub struct RenderResources(
 );
 
 /// An enum describing how the renderer will initialize resources. This is used when creating the [`RenderPlugin`](crate::RenderPlugin).
+#[expect(
+    clippy::large_enum_variant,
+    reason = "See https://github.com/bevyengine/bevy/issues/19220"
+)]
 pub enum RenderCreation {
     /// Allows renderer resource initialization to happen outside of the rendering plugin.
     Manual(RenderResources),

crates/bevy_text/src/pipeline.rs

@@ -532,7 +532,7 @@ fn get_attrs<'a>(
     face_info: &'a FontFaceInfo,
     scale_factor: f64,
 ) -> Attrs<'a> {
-    let attrs = Attrs::new()
+    Attrs::new()
         .metadata(span_index)
         .family(Family::Name(&face_info.family_name))
         .stretch(face_info.stretch)
@@ -545,8 +545,7 @@ fn get_attrs<'a>(
             }
             .scale(scale_factor as f32),
         )
-        .color(cosmic_text::Color(color.to_linear().as_u32()));
-    attrs
+        .color(cosmic_text::Color(color.to_linear().as_u32()))
 }
 
 /// Calculate the size of the text area for the given buffer.