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[3.8] bpo-25872: Fix KeyError using linecache from multiple threads (GH-20079) #20079

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[3.8] bpo-25872: Fix KeyError using linecache from multiple threads (GH-20079) #20079

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6 changes: 3 additions & 3 deletions Lib/linecache.py
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Original file line number Diff line number Diff line change
Expand Up @@ -73,10 +73,10 @@ def checkcache(filename=None):
try:
stat = os.stat(fullname)
except OSError:
del cache[filename]
cache.pop(filename, None)
continue
if size != stat.st_size or mtime != stat.st_mtime:
del cache[filename]
cache.pop(filename, None)


def updatecache(filename, module_globals=None):
Expand All @@ -86,7 +86,7 @@ def updatecache(filename, module_globals=None):

if filename in cache:
if len(cache[filename]) != 1:
del cache[filename]
cache.pop(filename, None)
if not filename or (filename.startswith('<') and filename.endswith('>')):
return []

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