William Pitcock added the comment:
It seems to me that calling __contains__() (PySequence_Contains()) isn't
necessary, as the first and last elements of the list are already known, and
therefore known to be in the list. Revising the behaviour of popitem() to
avoid calling _odict_popkey
William Pitcock added the comment:
At least in my case, the application is single-threaded. I don't think this is
a locking-related issue as the expiringdict test case itself fails which is
also single-threaded.
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Python tracker
William Pitcock added the comment:
A frequent reproducer is to run the expiringdict tests on Python 3.5.1,
unfortunately I cannot come up with a testcase.
Replacing use of popitem() with "del self[next(OrderedDict.__iter__(self))]"
removes the KeyErrors and the structure otherwise
New submission from William Pitcock:
The C-based optimised version of collections.OrderedDict occasionally throws
KeyErrors when deleting items.
See https://github.com/mailgun/expiringdict/issues/16 for an example of this
regression.
Backporting 3.6's patches to 3.5.1 does not resolv
