[bug #18494] NSRunAlertPanel crash problems (threads?)

[Fred Kiefer]

Follow-up Comment #3, bug #18494 (project gnustep):

Thank you for analysing this bug. Now even I understand wh this is going
wrong :-)

I think for the standard use of an alert this is a great solution. If you
want top put up an alert it should be started by the main thread. We might
even want to put this switch to the main thread into the NSApplication
runModalForWindow: method.

But what about alerts being used as error notifications by the gui code
itself? I normally want to be able to fire up a debugger and look at what
triggered the error condition. When we change this code  to run in a seperate
thread that wont be that easy. And what should happen to the thread that run
into the problem? But then again debugging multi threaded applications has
never been easy.

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