Description

Hiya! I've been doing some work for a winit upgrade for egui (emilk/egui#4849), but, it seems that this commit has introduced a crash on macOS. The multiple_viewports example spawns a immediate child viewport, but on macOS this crashes with:

Segmentation fault: 11

It seems some precondition of retain is violated (though it's a safe function? Is objc2 wrong? Really above my paygrade I'm afraid!)

This might already be fixed in 0.31.0 as I think the code in that area has changed a bit, but either way wanted to let you know.

macOS version

ProductName:		macOS
ProductVersion:		14.5
BuildVersion:		23F79

Winit version

0.30.0 works, 0.30.1+ crashes