[MacOs] 0.15 panic: wgpu error: Validation Error

[extrawurst]

Bevy version

Bevy 0.15

[Optional] Relevant system information

MacOs 15.1.1 (24B91)
Rust 1.83.0 (90b35a623 2024-11-26)

If your bug is rendering-related, copy the adapter info that appears when you run Bevy.

Adapter AdapterInfo { name: "Apple M1 Max", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }    

What you did

In my project (closed source) once i drop my crate bevy_debug_log my app crashes on start.

What went wrong

thread '<unnamed>' panicked at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs:2976:18:
wgpu error: Validation Error

Caused by:
  In RenderPass::end
    In a pass parameter
      Attachments have differing sample counts: the depth attachment's texture view has count 1 but is followed by the color attachment at index 0's texture view which has count 4


stack backtrace:
   0: rust_begin_unwind
             at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:665:5
   1: core::panicking::panic_fmt
             at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panicking.rs:74:14
   2: wgpu::backend::wgpu_core::default_error_handler
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs:3050:5
   3: wgpu::backend::wgpu_core::ErrorSinkRaw::handle_error
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs:3034:21
   4: wgpu::backend::wgpu_core::ContextWgpuCore::handle_error_inner
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs:299:9
   5: wgpu::backend::wgpu_core::ContextWgpuCore::handle_error
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs:311:9
   6: <wgpu::backend::wgpu_core::ContextWgpuCore as wgpu::context::Context>::render_pass_end
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs:2976:18
   7: core::ptr::drop_in_place<wgpu::api::render_pass::RenderPassInner>
             at /Users/stephan/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:574:1
   8: core::ptr::drop_in_place<wgpu::api::render_pass::RenderPass>
             at /Users/stephan/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:574:1
   9: core::ptr::drop_in_place<bevy_render::render_phase::draw_state::TrackedRenderPass>
             at /Users/stephan/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:574:1
  10: <bevy_core_pipeline::core_2d::main_transparent_pass_2d_node::MainTransparentPass2dNode as bevy_render::render_graph::node::ViewNode>::run
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_core_pipeline-0.15.0/src/core_2d/main_transparent_pass_2d_node.rs:81:9
  11: <bevy_render::render_graph::node::ViewNodeRunner<T> as bevy_render::render_graph::node::Node>::run
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_render-0.15.0/src/render_graph/node.rs:414:9
  12: bevy_render::renderer::graph_runner::RenderGraphRunner::run_graph
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_render-0.15.0/src/renderer/graph_runner.rs:225:21
  13: bevy_render::renderer::graph_runner::RenderGraphRunner::run_graph
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_render-0.15.0/src/renderer/graph_runner.rs:232:21
  14: bevy_render::renderer::graph_runner::RenderGraphRunner::run
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_render-0.15.0/src/renderer/graph_runner.rs:80:9
  15: bevy_render::renderer::render_system
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_render-0.15.0/src/renderer/mod.rs:40:15
  16: core::ops::function::FnMut::call_mut
             at /Users/stephan/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:166:5
  17: core::ops::function::impls::<impl core::ops::function::FnMut<A> for &mut F>::call_mut
             at /Users/stephan/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:294:13
  18: <Func as bevy_ecs::system::exclusive_function_system::ExclusiveSystemParamFunction<fn(F0) .> Out>>::run::call_inner
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_ecs-0.15.0/src/system/exclusive_function_system.rs:245:21
  19: <Func as bevy_ecs::system::exclusive_function_system::ExclusiveSystemParamFunction<fn(F0) .> Out>>::run
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_ecs-0.15.0/src/system/exclusive_function_system.rs:248:17
  20: <bevy_ecs::system::exclusive_function_system::ExclusiveFunctionSystem<Marker,F> as bevy_ecs::system::system::System>::run::{{closure}}
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_ecs-0.15.0/src/system/exclusive_function_system.rs:129:23
  21: bevy_ecs::world::World::last_change_tick_scope
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_ecs-0.15.0/src/world/mod.rs:3187:9
  22: <bevy_ecs::system::exclusive_function_system::ExclusiveFunctionSystem<Marker,F> as bevy_ecs::system::system::System>::run
             at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_ecs-0.15.0/src/system/exclusive_function_system.rs:121:9

Additional information

maybe related to #16588 though different panic location. and i am not doing any custom shader, material or vertexbuffer shenigans.

my bevy features:

bevy = { version = "0.15", default-features = false, features = [
    "bevy_audio",
    "bevy_gizmos",
    "bevy_text",
    "bevy_winit",
    "bevy_window",
    "bevy_ui",
    "multi_threaded",
    "vorbis",
    "webgl2",
    "x11",
] }

[extrawurst]

running the same code on ios simulator gives slightly more output:

Missing downlevel flags: DownlevelFlags(INDIRECT_EXECUTION | BASE_VERTEX | CUBE_ARRAY_TEXTURES | COMPARISON_SAMPLERS)
The underlying API or device in use does not support enough features to be a fully compliant implementation of WebGPU. A subset of the features can still be used. If you are running this program on native and not in a browser and wish to limit the features you use to the supported subset, call Adapter::downlevel_properties or Device::downlevel_properties to get a listing of the features the current platform supports.  log.file="/Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-core-23.0.1/src/instance.rs" log.line=609 log.module_path="wgpu_core::instance" log.target="wgpu_core::instance"
DownlevelCapabilities {
    flags: DownlevelFlags(
        COMPUTE_SHADERS | FRAGMENT_WRITABLE_STORAGE | READ_ONLY_DEPTH_STENCIL | NON_POWER_OF_TWO_MIPMAPPED_TEXTURES | INDEPENDENT_BLEND | VERTEX_STORAGE | ANISOTROPIC_FILTERING | FRAGMENT_STORAGE | MULTISAMPLED_SHADING | DEPTH_TEXTURE_AND_BUFFER_COPIES | WEBGPU_TEXTURE_FORMAT_SUPPORT | BUFFER_BINDINGS_NOT_16_BYTE_ALIGNED | UNRESTRICTED_INDEX_BUFFER | FULL_DRAW_INDEX_UINT32 | DEPTH_BIAS_CLAMP | VIEW_FORMATS | UNRESTRICTED_EXTERNAL_TEXTURE_COPIES | SURFACE_VIEW_FORMATS | NONBLOCKING_QUERY_RESOLVE | VERTEX_AND_INSTANCE_INDEX_RESPECTS_RESPECTIVE_FIRST_VALUE_IN_INDIRECT_DRAW,
    ),
    limits: DownlevelLimits,
    shader_model: Sm5,
}  log.file="/Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-core-23.0.1/src/instance.rs" log.line=614 log.module_path="wgpu_core::instance" log.target="wgpu_core::instance"
nw_connection_copy_connected_local_endpoint_block_invoke [C1] Connection has no local endpoint
Failed to send CA Event for app launch measurements for ca_event_type: 0 event_name: com.apple.app_launch_measurement.FirstFramePresentationMetric
Creating new window "App" (0v1#4294967296)
Handling wgpu errors as fatal by default  log.file="/Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs" log.line=2976 log.module_path="wgpu::backend::wgpu_core" log.target="wgpu::backend::wgpu_core"
thread '<unnamed>' panicked at /Users/stephan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-23.0.1/src/backend/wgpu_core.rs:2976:18:
wgpu error: Validation Error

Caused by:
  In RenderPass::end
    In a pass parameter
      Attachments have differing sample counts: the depth attachment's texture view has count 1 but is followed by the color attachment at index 0's texture view which has count 4

[extrawurst]

ok i found the tinyest reproducer:

use bevy::prelude::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .run();
}

fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    commands.spawn(Camera2d);

    // only difference to example `sprite.rs`
    commands.spawn((
        Camera2d,
        Msaa::Off,
        Camera {
            order: 1,
            ..default()
        },
    ));
    commands.spawn(Sprite::from_image(
        asset_server.load("branding/bevy_bird_dark.png"),
    ));
}

Its when having two cameras with different Msaa settings. Which kind of sucks, because in this case my crate bevy_debug_log needs to attach its own camera and somehow now needs to know if other cameras have Msaa::Off to mirror that to not trigger this panic