Nick Coghlan added the comment:
I've been looking into this further, and a reproducer that's independent of
assertRaises() is to just bind the function to a local variable name in an
outer function:
def outer():
callable_obj = f
try:
callable_obj()
except Exception as exc:
return exc
That should make it easier to test a basic recursive "clear_all_frames"
operation like:
def clear_all_frames(exc):
cause = exc.__cause__
if cause is not None:
clear_all_frames(cause)
context = exc.__context__
if context is not None:
clear_all_frames(context)
traceback.clear_frames(exc.__traceback__)
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<http://bugs.python.org/issue23890>
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