Ivan Levkivskyi added the comment:
> why not add corresponding clearing methods obj._abc_cache.clear and
> obj._abc_negative_cache.clear to typing._cleanups ?
OK, this is another possible solution. I didn't think about this, because now
typing._cleanups only clear generic caches (not ABC caches).
> Why there are problems only with ABC caches of these three types?
Normally, ABC caches are cleared in dash_R_cleanup, but I think that the
problem is that inspect.isabstract returns False for these three types (unlike
other types in typing module), see line 147 in refleak.py:
if not isabstract(abc):
continue
Actually now I think that the code in dash_R_cleanup might not clear some other
caches also. So maybe we just need to add all ABC caches to typing._cleanups
(just in case). What do you think, Serhiy?
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29638>
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