Terry J. Reedy <tjre...@udel.edu> added the comment:
The offending function is
def event_delete(self, virtual, *sequences):
if virtual not in self.__eventinfo:
return
func, triplets = self.__eventinfo[virtual]
for seq in sequences:
triplet = _parse_sequence(seq)
if triplet is None:
#print("Tkinter event_delete: %s" % seq,
file=sys.__stderr__)
widget.event_delete(self, virtual, seq)
else:
if func is not None:
self.__binders[triplet[1]].unbind(triplet, func)
triplets.remove(triplet)
The triplets collection is part of *virtual* whereas each triplet is derived
from a member of sequences.
The discrepancy seems to be extremely rare. I will catch the exception until
such time as I see a plausible, reproducible, and testable reason.
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue45197>
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