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# Objective - After #9826, there are issues on "run once runners" - example `without_winit` crashes: ``` 2023-10-19T22:06:01.810019Z INFO bevy_render::renderer: AdapterInfo { name: "llvmpipe (LLVM 15.0.7, 256 bits)", vendor: 65541, device: 0, device_type: Cpu, driver: "llvmpipe", driver_info: "Mesa 23.2.1 - kisak-mesa PPA (LLVM 15.0.7)", backend: Vulkan } 2023-10-19T22:06:02.860331Z WARN bevy_audio::audio_output: No audio device found. 2023-10-19T22:06:03.215154Z INFO bevy_diagnostic::system_information_diagnostics_plugin::internal: SystemInfo { os: "Linux 22.04 Ubuntu", kernel: "6.2.0-1014-azure", cpu: "Intel(R) Xeon(R) CPU E5-2673 v3 @ 2.40GHz", core_count: "2", memory: "6.8 GiB" } thread 'main' panicked at crates/bevy_render/src/pipelined_rendering.rs:91:14: Unable to get RenderApp. Another plugin may have removed the RenderApp before PipelinedRenderingPlugin note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace ``` - example `headless` runs the app twice with the `run_once` schedule ## Solution - Expose a more complex state of an app than just "ready" - Also block adding plugins to an app after it has finished or cleaned up its plugins as that wouldn't work anyway ## Migration Guide * `app.ready()` has been replaced by `app.plugins_state()` which will return more details on the current state of plugins in the app |
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