Greetings, Today I Learned :) if a thread throws an exception that isn't rescued by the top of the thread, it'll crash the app's main thread with 'Program received signal: “SIGABRT”.'
That's been plaguing me since I started doing MacRuby development; every time I tried to start up multiple threads, the app became incredibly fragile and, unlike the main thread, it wouldn't show ruby traces. Now I just wrap threads in begin/rescue blocks, and I'm all good. Good programming practice anyway, but the failure mode is unobvious if you don't. Hopefully this helps someone else! -- Morgan
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