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# Objective Spamming the window close button on window may trigger a panic. ``` thread 'main' panicked at <Bevy repo>\crates\bevy_ecs\src\system\commands\mod.rs:1320:13: error[B0003]: Could not insert a bundle (of type `bevy_window:🪟:ClosingWindow`) for entity 0v1#4294967296 because it doesn't exist in this World. See: https://bevyengine.org/learn/errors/b0003 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace Encountered a panic when applying buffers for system `bevy_window::system::close_when_requested`! 2024-08-01T15:00:29.742612Z WARN bevy_ecs::world::command_queue: CommandQueue has un-applied commands being dropped. Did you forget to call SystemState::apply? Encountered a panic in system `bevy_app::main_schedule::Main::run_main`! error: process didn't exit successfully: `target\debug\bevy.exe` (exit code: 101) ``` ## Solution Don't panic when trying to insert the `ClosingWindow` component into a entity. ## Testing Found and tested on windows. I haven't checked if this bug happens on linux or macos. For testing I ran this code: ```rust use std::{thread, time::Duration}; use bevy::prelude::*; fn lag() { thread::sleep(Duration::from_millis(300)); } fn main() -> AppExit { App::new() .add_plugins(DefaultPlugins) .add_systems(Update, lag) .run() } ``` Then spammed the window close button. The panic no longer occurs. |
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Bevy Window
