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bpo-41471: Ignore invalid prefix lengths in system proxy settings on macOS (GH-22762) (GH-22773)

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(cherry picked from commit 93a1ccabde)

Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>
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Miss Skeleton (bot) 2020-10-20 00:17:22 -07:00 • committed by GitHub
parent 479553c7c1
commit aa7b03b31b
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3 changed files with 18 additions and 0 deletions
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5
Lib/urllib/request.py
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@ -2596,6 +2596,11 @@ def _proxy_bypass_macosx_sysconf(host, proxy_settings):
mask = 8 * (m.group(1).count('.') + 1)
else:
mask = int(mask[1:])
if mask < 0 or mask > 32:
# System libraries ignore invalid prefix lengths
continue
mask = 32 - mask
if (hostIP >> mask) == (base >> mask):