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-display gtk,gl=on crashes on Wayland
steps to reproduce:
1. run a Wayland compositor (I use sway, probably the same bug exists for other compositors)
2. execute qemu -display gtk,gl=on
expected results:
a GTK window is created that shows SeaBIOS failing to boot
actual results:
segmentation fault qemu-system-x86_64 -display gtk,gl=on
additional information:
qemu version 2.12.0 from Arch Linux
looks like qemu is trying to take the Wayland display from GTK and initialize EGL but telling EGL it's a X11 display, which is not correct. setting GDK_BACKEND=x11 works around the issue.
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