[winit-example] wgpu error: Validation Error

[T-256]

>cargo r --bin winit-example
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
     Running `target\debug\winit-example.exe`
vello_cpu: 8.8ms (cmds: 137us, flush: 1.6ms, render: 7.1ms)
softbuffer: 58ms (buffer_mut: 3.5us, render: 24ms, swizel: 33ms, present: 299us)
Frame time: 51ms (cmd: 126us, render: 46ms, present: 1.1ms, wait: 4.3ms)
vello_cpu: 8.1ms (cmds: 26us, flush: 1.2ms, render: 6.8ms)
pixels: 9.4ms (render: 8.2ms, present: 1.2ms)

thread 'main' panicked at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\wgpu-26.0.1\src\backend\wgpu_core.rs:3526:18:
wgpu error: Validation Error

Caused by:
  In Surface::configure
    Invalid surface


stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/17067e9ac6d7ecb70e50f92c1944e545188d2359/library\std\src/panicking.rs:697:5
   1: core::panicking::panic_fmt
             at /rustc/17067e9ac6d7ecb70e50f92c1944e545188d2359/library\core\src/panicking.rs:75:14
   2: wgpu::backend::wgpu_core::default_error_handler
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\wgpu-26.0.1\src\backend\wgpu_core.rs:659:5
   3: wgpu::backend::wgpu_core::ErrorSinkRaw::handle_error
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\wgpu-26.0.1\src\backend\wgpu_core.rs:643:21
   4: wgpu::backend::wgpu_core::ContextWgpuCore::handle_error_inner
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\wgpu-26.0.1\src\backend\wgpu_core.rs:298:9
   5: wgpu::backend::wgpu_core::ContextWgpuCore::handle_error_nolabel
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\wgpu-26.0.1\src\backend\wgpu_core.rs:323:9
   6: <wgpu::backend::wgpu_core::CoreSurface as wgpu::dispatch::SurfaceInterface>::configure
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\wgpu-26.0.1\src\backend\wgpu_core.rs:3525:13
   7: wgpu::api::surface::Surface::configure
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\wgpu-26.0.1\src\api\surface.rs:94:9
   8: wgpu_context::surface_renderer::SurfaceRenderer::configure
             at .\crates\wgpu_context\src\surface_renderer.rs:186:9
   9: wgpu_context::surface_renderer::SurfaceRenderer::new::{{closure}}
             at .\crates\wgpu_context\src\surface_renderer.rs:150:9
  10: wgpu_context::WGPUContext::create_surface::{{closure}}
             at .\crates\wgpu_context\src\lib.rs:94:10
  11: pollster::block_on
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\pollster-0.4.0\src\lib.rs:126:15
  12: <anyrender_vello::window_renderer::VelloWindowRenderer as anyrender::WindowRenderer>::resume
             at .\crates\anyrender_vello\src\window_renderer.rs:132:30
  13: winit_example::App::set_backend
             at .\examples\winit\src\main.rs:145:9
  14: <winit_example::App as winit::application::ApplicationHandler>::window_event
             at .\examples\winit\src\main.rs:203:21
  15: winit::event_loop::dispatch_event_for_app
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\event_loop.rs:642:52
  16: winit::event_loop::EventLoop<T>::run_app::{{closure}}
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\event_loop.rs:265:49
  17: winit::platform_impl::windows::event_loop::EventLoop<T>::run_on_demand::{{closure}}
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:264:21
  18: <alloc::boxed::Box<F,A> as core::ops::function::FnMut<Args>>::call_mut
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\alloc\src\boxed.rs:1973:9
  19: winit::platform_impl::windows::event_loop::runner::EventLoopRunner<T>::call_event_handler::{{closure}}
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop\runner.rs:236:13
  20: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\core\src\panic\unwind_safe.rs:272:9
  21: std::panicking::try::do_call
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\std\src\panicking.rs:589:40
  22: __rust_try
  23: std::panicking::try
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\std\src\panicking.rs:552:19
  24: std::panic::catch_unwind
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\std\src\panic.rs:359:14
  25: winit::platform_impl::windows::event_loop::runner::EventLoopRunner<T>::catch_unwind
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop\runner.rs:173:26
  26: winit::platform_impl::windows::event_loop::runner::EventLoopRunner<T>::call_event_handler
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop\runner.rs:230:9
  27: winit::platform_impl::windows::event_loop::runner::EventLoopRunner<T>::send_event
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop\runner.rs:220:13
  28: winit::platform_impl::windows::event_loop::WindowData::send_event
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:129:9
  29: winit::platform_impl::windows::event_loop::public_window_callback_inner::{{closure}}
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:1141:13
  30: core::ops::function::FnOnce::call_once
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\core\src\ops\function.rs:250:5
  31: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\core\src\panic\unwind_safe.rs:272:9
  32: std::panicking::try::do_call
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\std\src\panicking.rs:589:40
  33: __rust_try
  34: std::panicking::try
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\std\src\panicking.rs:552:19
  35: std::panic::catch_unwind
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\std\src\panic.rs:359:14
  36: winit::platform_impl::windows::event_loop::runner::EventLoopRunner<T>::catch_unwind
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop\runner.rs:173:26
  37: winit::platform_impl::windows::event_loop::public_window_callback_inner
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:1151:5
  38: winit::platform_impl::windows::event_loop::public_window_callback
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:1098:31
  39: <unknown>
  40: <unknown>
  41: winit::platform_impl::windows::event_loop::EventLoop<T>::dispatch_peeked_messages
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:419:21
  42: winit::platform_impl::windows::event_loop::EventLoop<T>::run_on_demand
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:277:13
  43: winit::platform_impl::windows::event_loop::EventLoop<T>::run
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\platform_impl\windows\event_loop.rs:233:9
  44: winit::event_loop::EventLoop<T>::run_app
             at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\winit-0.30.12\src\event_loop.rs:265:9
  45: winit_example::main
             at .\examples\winit\src\main.rs:225:5
  46: core::ops::function::FnOnce::call_once
             at C:\Users\User\.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/src/rust\library\core\src\ops\function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
error: process didn't exit successfully: `target\debug\winit-example.exe` (exit code: 101)

[nicoburns]

@T-256 Which platform are you running this on? Did you perform any action before it crashed? (resize the window? switch the backend by pressing space?)

[T-256]

I'm on Windows 2024H2. Yes, I tried to switch the backend by pressing the space. I think, it's related to Vello(classic) backend.

[nicoburns]

Does it still happen if you change the example to use vello from when it first starts up?

[T-256]

fixed panic by this patch:

-                Renderer::Cpu(_) | Renderer::CpuSoftbuffer(_) => {
-                    self.set_backend(VelloWindowRenderer::new(), event_loop);
-                }
+                Renderer::Cpu(_) => {
+                    self.set_backend(VelloCpuSBWindowRenderer::new(), event_loop);
+                }
+                Renderer::CpuSoftbuffer(_) => {
+                    self.set_backend(VelloWindowRenderer::new(), event_loop);
+                }

But another issue is I cannot see Null and CpuSoftbuffer colors applied to window. (Only green and red what I can see)
I can see Null and CpuSoftbuffer specified colors when I set InitialBackend to their window renderer, and after pressing few space key, I'm unable to see them again.

[nicoburns]

But another issue is I cannot see Null and CpuSoftbuffer colors applied to window. (Only green and red what I can see) I can see Null and CpuSoftbuffer specified colors when I set InitialBackend to their window renderer, and after pressing few space key, I'm unable to see them again.

You shouldn't be able to see anything for Null. The Null backend doesn't actually render anything (it's just a dummy backend in case you need something that implements the interfaces without pulling in any dependencies).

Not sure about the issue with SoftBuffer though. I suspect that none of these crates have been tested with other renderers also compiled in, becuase I'm not aware of anyone doing that in real code.

[T-256]

You shouldn't be able to see anything

[nicoburns]

Looks like you maybe if you've already rendered something with a different backend then it stays on screen when you display the null backend...

[T-256]

It's not Null only, even happens for CpuSoftbuffer backend too.

[nicoburns]

Yeah, I'm not sure why that's happening.