Infinite Mac crash when using CMD-Q and cancelling the quit browser dialog

[that-ben]

I don't know if it's worth investigating, but I figure it's best to post it just in case it might lead to discovering more bugs related to this. It's 100% reproducible in Firefox under macOS Sonoma:

1. Launch Mac OS 9 in IM: https://infinitemac.org/1999/Mac%20OS%209.0

2. Left click a sticky note.

3. Hit CMD-Q which will trigger Firefox quit browser confirmation dialog. Click cancel.

4. Type the letter Q on your keyboard a couple times and IM will crash with one of those (random, but most of the times I get an out of bounds exception and sometimes the Aborted() error)

[ghost]

I was messing around in Mac OS 9 and somehow triggered this error in Chrome on Windows. I don't remember what I was doing but I somehow crashed the emulator while doing nothing that should crash it. Wonder if the SheepShaver emulators are getting unstable for some reason.

It might be worth actually building SheepShaver with "-sASSERTIONS" so we can figure out exactly why it crashes (since this dialog only appears if there is an error, it would be useful to know why the emulator aborted)

[that-ben]

It definitely has something to do with keystrokes after the emulator canvas is losing and regaining focus. Somehow it overflows a buffer of some kind, but I'll not pollute this thread with assumptions and leave the pro take a look at it 😜