Issue #22770: Prevent some Tk segfaults on OS X when running gui tests.
When running tests in subprocesses with the regrtest -j option, a bug in Cocoa Tk can result in a Tcl segfault. Avoid the problem by forcing Tk to fully initialize as an OS X gui process before destroying the Tcl instance and creating another. (Original patch by Serhiy Storchaka)
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@ -461,12 +461,11 @@ def _is_gui_available():
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reason = "cannot run without OS X gui process"
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# check on every platform whether tkinter can actually do anything
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# but skip the test on OS X because it can cause segfaults in Cocoa Tk
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# when running regrtest with the -j option (multiple threads/subprocesses)
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if (not reason) and (sys.platform != 'darwin'):
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if not reason:
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try:
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from tkinter import Tk
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root = Tk()
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root.update()
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root.destroy()
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except Exception as e:
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err_string = str(e)
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