Comment 10 for bug 1832635

I found this on the web (his debugger is obviously better than mine):

Exception Name: NSGenericException
-------
Exception Reason: -[NSAlert runModal] may not be invoked inside of transaction begin/commit pair, or inside of transaction commit (usually this means it was invoked inside of a view's -drawRect: method.)

Full details:

0 CoreFoundation 0x00007fff3f66e2fb __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fff65fdfc76 objc_exception_throw + 48
2 CoreFoundation 0x00007fff3f6ffd6d +[NSException raise:format:] + 205
3 AppKit 0x00007fff3d4c9319 _NSRunModal + 484
4 AppKit 0x00007fff3cea97ad -[NSAlert runModal] + 240