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Fix crash on Windows when closing Window #80142

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merged 1 commit into from
Aug 2, 2023

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Sauermann
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resolve #80134
regression from #67791
conflict with #73239

  1. Send WINDOW_EVENT_MOUSE_EXIT when a window is destroyed.

This fix had been included in #67791 for some time to fix comment #67791 (comment), but unfortunately (I apologize) got lost because I have developed the PR on two different computers.
This fix alone however no longer works in current master, because it conflicts with #73239.

  1. Ensure, that on Windows, the event_callback is still valid during destroying the Window.

#73239 cleared the event_callback before calling DisplayServer::delete_sub_window.
However on Windows it becomes necessary, that this callback is still valid while the Window is destroyed.

#73239 had the goal of closing issue #72707, which is linuxbsd-specific.
In this PR I move the changes of #73239 from Window to DisplayServerX11, so that on linuxbsd #72707 should not be reintroduced. I can't test #72707, because I don't have the specific Window-manager i3wm installed. @bruvzg Since that PR was from you, may I ask you, if you consider this change valid?

Send `WINDOW_EVENT_MOUSE_EXIT` when a window is destroyed.

Ensure, that on Windows, the event_callback is still valid during
destroying the `Window`.
@akien-mga akien-mga merged commit 933281f into godotengine:master Aug 2, 2023
@akien-mga
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Thanks!

@Sauermann Sauermann deleted the fix-window-close-crash branch August 2, 2023 16:05
@bruvzg
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bruvzg commented Aug 3, 2023

The same crash is also present on macOS, I expect it's the case on X11 as well. Neither is sending mouse leave event on window destruction or tracking last window with the mouse and only forwarding Mouse Enter/Leave system events.

@Sauermann
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I was unable to replicate the crash on X11.
Regarding MacOS, the crash should be mitigated by #80187.

@Sauermann
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@bruvzg you were right, that the crash happens also on X11: #79325 (comment)
A way to fixing this crash on the platform-display-server-side is available for X11 in #80279

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Summersay415 commented May 28, 2024

This PR causes double 'close_requested' emission on Window with 'popup_window' enabled, but only on Linux/*BSD. Issue: #92417

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Random crashes from Window::_event_callback
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