# Objective
Fixes#16525Fixes#19710
## Solution
Not allocating a mesh if it is empty.
## Testing
I tested using the following minimum repro from #16525
```rust
use bevy::{asset::RenderAssetUsages, prelude::*, render::mesh::PrimitiveTopology};
fn main() {
App::new()
.add_plugins(DefaultPlugins)
.add_systems(Startup, setup)
.run();
}
fn setup(
mut commands: Commands,
mut meshes: ResMut<Assets<Mesh>>,
mut materials: ResMut<Assets<ColorMaterial>>,
) {
commands.spawn(Camera2d);
let mesh = Mesh::new(
PrimitiveTopology::TriangleList,
RenderAssetUsages::default(),
);
commands.spawn((
Mesh2d(meshes.add(mesh)),
MeshMaterial2d(materials.add(Color::hsl(180.0, 0.95, 0.7))),
));
}
```
I was able to test on webgl2 and windows native and the issue seems to
be resolved. I am not familiar with how mesh rendering works and feel
like just skipping meshes should cause issues but I did not notice any.
905965b842