[Jack Jansen]

test_cpickle suddenly started failing (often with a hang) in MacPython (CVS tree, main branch).

Ouch!

As I'm going to be offline all day tomorrow and I'd like to get MacPython out the door simultaneously with unix and windows-Python: does anyone know what could have changed over the last couple of days to cause this?

Two very recent changes: 1. Low probability. Guido changed the way pickle works for instances of new-style classes with custom metatypes. 2. High probability. Since 2001/10/15, test_pickle and test_cpickle actually didn't run any tests at all. Guido discovered this when working on #1 and not seeing an expected error. When they were converted to unittests, an inappropriate piece of if __name__ == '__main__':' boilerplate prevented them from running any tests unless run directly (when run via regrtest.py, they didn't do anything). Fred fixed that about 24 hours ago. Unfortunately, #2 means "the real" problem may have been introduced anytime within the last 2 months. Please try to whittle the failure down -- I'll be happy to help, but there are no failures here. It would also help to know once again *exactly* how you run the test suite (previous problems unique to you have been pinned on something unique about the way you run tests, no matter how much you protest in advance that it isn't possible <wink>).