bevy_wgpu panics on minimizing a running window.

[james7132]

Bevy version

Current HEAD (73f4a9d1)

Operating system & version

Windows 10 v19042.985

What you did

Minimized a live window with the running game.

What you expected to happen

bevy_wgpu would not panic.

What actually happened

bevy_wgpu panicked.

Additional information

Full stack trace.

thread 'main' panicked at 'Index 0 is already occupied', C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\wgpu-core-0.8.1\src\hub.rs:169:18
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/2fd73fabe469357a12c2c974c140f67e7cdd76d0\/library\std\src\panicking.rs:493
   1: std::panicking::begin_panic_fmt
             at /rustc/2fd73fabe469357a12c2c974c140f67e7cdd76d0\/library\std\src\panicking.rs:435
   2: wgpu_core::hub::Storage<wgpu_core::swap_chain::SwapChain<gfx_backend_vulkan::Backend>, wgpu_core::id::Id<wgpu_core::swap_chain::SwapChain<gfx_backend_empty::Backend>>>::insert_impl<wgpu_core::swap_chain::SwapChain<gfx_backend_vulkan::Backend>,wgpu_core::i
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\wgpu-core-0.8.1\src\hub.rs:169
   3: wgpu_core::hub::Storage<wgpu_core::swap_chain::SwapChain<gfx_backend_vulkan::Backend>, wgpu_core::id::Id<wgpu_core::swap_chain::SwapChain<gfx_backend_empty::Backend>>>::insert_error<wgpu_core::swap_chain::SwapChain<gfx_backend_vulkan::Backend>,wgpu_core::
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\wgpu-core-0.8.1\src\hub.rs:180
   4: wgpu_core::hub::Global<wgpu_core::hub::IdentityManagerFactory>::device_create_swap_chain<wgpu_core::hub::IdentityManagerFactory,gfx_backend_vulkan::Backend>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\wgpu-core-0.8.1\src\device\mod.rs:4510
   5: wgpu::backend::direct::{{impl}}::device_create_swap_chain
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\wgpu-0.8.1\src\backend\direct.rs:794
   6: wgpu::Device::create_swap_chain
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\wgpu-0.8.1\src\lib.rs:1659
   7: bevy_wgpu::renderer::wgpu_render_resource_context::{{impl}}::create_swap_chain
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_wgpu\src\renderer\wgpu_render_resource_context.rs:369     
   8: bevy_render::render_graph::nodes::window_swapchain_node::{{impl}}::update
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_render\src\render_graph\nodes\window_swapchain_node.rs:65 
   9: bevy_wgpu::renderer::wgpu_render_graph_executor::WgpuRenderGraphExecutor::execute
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_wgpu\src\renderer\wgpu_render_graph_executor.rs:75        
  10: bevy_wgpu::wgpu_renderer::{{impl}}::run_graph::{{closure}}
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_wgpu\src\wgpu_renderer.rs:121
  11: bevy_ecs::world::World::resource_scope<bevy_render::render_graph::graph::RenderGraph,tuple<>,closure-0>
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_ecs\src\world\mod.rs:715
  12: bevy_wgpu::wgpu_renderer::WgpuRenderer::run_graph
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_wgpu\src\wgpu_renderer.rs:110
  13: bevy_wgpu::wgpu_renderer::WgpuRenderer::update
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_wgpu\src\wgpu_renderer.rs:127
  14: bevy_wgpu::get_wgpu_render_system::{{closure}}
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_wgpu\src\lib.rs:128
  15: alloc::boxed::{{impl}}::call_mut<tuple<mut bevy_ecs::world::World*>,FnMut<tuple<mut bevy_ecs::world::World*>>,alloc::alloc::Global>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\boxed.rs:1528
  16: bevy_ecs::system::exclusive_system::{{impl}}::run
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_ecs\src\system\exclusive_system.rs:41
  17: bevy_ecs::schedule::stage::{{impl}}::run
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_ecs\src\schedule\stage.rs:812
  18: bevy_ecs::schedule::Schedule::run_once
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_ecs\src\schedule\mod.rs:208
  19: bevy_ecs::schedule::{{impl}}::run
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_ecs\src\schedule\mod.rs:226
  20: bevy_app::app::App::update
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_app\src\app.rs:62
  21: bevy_winit::winit_runner_with::{{closure}}
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_winit\src\lib.rs:484
  22: winit::platform_impl::platform::event_loop::{{impl}}::run_return::{{closure}}<tuple<>,closure-1>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop.rs:203
  23: alloc::boxed::{{impl}}::call_mut<tuple<winit::event::Event<tuple<>>, mut winit::event_loop::ControlFlow*>,FnMut<tuple<winit::event::Event<tuple<>>, mut winit::event_loop::ControlFlow*>>,alloc::alloc::Global>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\boxed.rs:1528
  24: winit::platform_impl::platform::event_loop::runner::{{impl}}::call_event_handler::{{closure}}<tuple<>>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop\runner.rs:245
  25: std::panic::{{impl}}::call_once<tuple<>,closure-0>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panic.rs:344
  26: std::panicking::try::do_call<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panicking.rs:379
  27: winit::platform_impl::platform::window::TASKBAR_LIST::__getit
  28: std::panicking::try<tuple<>,std::panic::AssertUnwindSafe<closure-0>>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panicking.rs:343
  29: std::panic::catch_unwind<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panic.rs:431
  30: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<tuple<>>::catch_unwind<tuple<>,tuple<>,closure-0>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop\runner.rs:152
  31: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<tuple<>>::call_event_handler<tuple<>>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop\runner.rs:239
  32: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<tuple<>>::move_state_to<tuple<>>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop\runner.rs:341
  33: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<tuple<>>::main_events_cleared<tuple<>>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop\runner.rs:227
  34: winit::platform_impl::platform::event_loop::flush_paint_messages<tuple<>>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop.rs:676
  35: winit::platform_impl::platform::event_loop::thread_event_target_callback::{{closure}}<tuple<>>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop.rs:1967
  36: std::panic::{{impl}}::call_once<isize,closure-0>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panic.rs:344
  37: std::panicking::try::do_call<std::panic::AssertUnwindSafe<closure-0>,isize>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panicking.rs:379
  38: winit::platform_impl::platform::window::TASKBAR_LIST::__getit
  39: std::panicking::try<isize,std::panic::AssertUnwindSafe<closure-0>>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panicking.rs:343
  40: std::panic::catch_unwind<std::panic::AssertUnwindSafe<closure-0>,isize>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\panic.rs:431
  41: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<tuple<>>::catch_unwind<tuple<>,isize,closure-0>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop\runner.rs:152
  42: winit::platform_impl::platform::event_loop::thread_event_target_callback<tuple<>>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop.rs:2151
  43: DefSubclassProc
  45: CallWindowProcW
  46: DispatchMessageW
  47: SendMessageTimeoutW
  48: KiUserCallbackDispatcher
  49: NtUserDispatchMessage
  50: DispatchMessageW
  51: winit::platform_impl::platform::event_loop::EventLoop<tuple<>>::run_return<tuple<>,closure-1>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop.rs:218
  52: winit::platform_impl::platform::event_loop::EventLoop<tuple<>>::run<tuple<>,closure-1>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\platform_impl\windows\event_loop.rs:188
  53: winit::event_loop::EventLoop<tuple<>>::run<tuple<>,closure-1>
             at C:\Users\James\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.24.0\src\event_loop.rs:154
  54: bevy_winit::run<closure-1>
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_winit\src\lib.rs:170
  55: bevy_winit::winit_runner_with
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_winit\src\lib.rs:492
  56: bevy_winit::winit_runner
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_winit\src\lib.rs:210
  57: core::ops::function::Fn::call<fn(bevy_app::app::App),tuple<bevy_app::app::App>>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\ops\function.rs:70
  58: alloc::boxed::{{impl}}::call<tuple<bevy_app::app::App>,Fn<tuple<bevy_app::app::App>>,alloc::alloc::Global>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\boxed.rs:1535
  59: bevy_app::app::App::run
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_app\src\app.rs:72
  60: bevy_app::app_builder::AppBuilder::run
             at C:\Users\James\.cargo\git\checkouts\bevy-f7ffde730c324c74\73f4a9d\crates\bevy_app\src\app_builder.rs:70
  61: fc::main
             at .\game\src\main.rs:94
  62: core::ops::function::FnOnce::call_once<fn(),tuple<>>
             at C:\Users\James\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\ops\function.rs:227

[alyti]

Related to #1882 and countless others

[james7132]

Duplicate of #2018.