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bpo-38735: Don't fail when importing from / with sys.pycache_prefix set (GH-30456)

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Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Petr Viktorin 2025-08-18 13:53:01 +02:00 • committed by GitHub
parent 043f251154
commit d8a9466e29
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3 changed files with 16 additions and 1 deletions
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Lib/importlib/_bootstrap_external.py
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@ -297,7 +297,8 @@ def cache_from_source(path, debug_override=None, *, optimization=None):
# Strip initial drive from a Windows path. We know we have an absolute
# path here, so the second part of the check rules out a POSIX path that
# happens to contain a colon at the second character.
if head[1] == ':' and head[0] not in path_separators:
# Slicing avoids issues with an empty (or short) `head`.
if head[1:2] == ':' and head[0:1] not in path_separators:
head = head[2:]
# Strip initial path separator from `head` to complete the conversion