[2.7] bpo-25872: fix KeyError on race in linecache.checkcache() #12061
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If two threads generating a traceback run checkcache() at the same time, they may both try to delete the same entries in the line cache, resulting in a KeyError in one. Use .pop(filename, None) instead of del, as it will not raise the KeyError. https://bugs.python.org/issue25872
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This looks fine to me. Please add a news entry. |
(Intended for squash merge.)
remilapeyre
approved these changes
Feb 28, 2019
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If two threads generating a traceback run checkcache() at the same time,
they may both try to delete the same entries in the line cache,
resulting in a KeyError in one. Use .pop(filename, None) instead of
del, as it will not raise the KeyError.
https://bugs.python.org/issue25872
https://bugs.python.org/issue25872