Unfortunately, the latest patch for bug 1880582 doesn't seem to have fixed this bug: bp-be5d3964-cc2e-45a8-8fed-65e8a0241104 The "mutations" whose only easy explanation was run loop nesting made it seem likely. And run loop nesting may yet be involved here. But "early" deallocation of an `NSWindow` object doesn't seem to be the trigger. On the positive side, I noticed that none of this bug's crashes happen on macOS 14 or later. So even without a fix, they should diminish over time.
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Unfortunately, the latest patch for bug 1880582 doesn't seem to have fixed this bug: bp-be5d3964-cc2e-45a8-8fed-65e8a0241104 That the "mutations'" only easy explanation was run loop nesting made it seem likely. And run loop nesting may yet be involved here. But "early" deallocation of an `NSWindow` object doesn't seem to be the trigger. On the positive side, I noticed that none of this bug's crashes happen on macOS 14 or later. So even without a fix, they should diminish over time.