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gh-94606: Fix error when message with Unicode surrogate not surrogateescaped string (GH-94641)

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Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Sidney Markowitz 2023-12-12 05:21:18 +13:00 • committed by GitHub
parent 3251ba8f1a
commit 27a5fd8cb8
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4 changed files with 49 additions and 16 deletions
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Lib/email/utils.py
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@ -44,10 +44,10 @@ specialsre = re.compile(r'[][\\()<>@,:;".]')
escapesre = re.compile(r'[\\"]')
def _has_surrogates(s):
"""Return True if s contains surrogate-escaped binary data."""
"""Return True if s may contain surrogate-escaped binary data."""
# This check is based on the fact that unless there are surrogates, utf8
# (Python's default encoding) can encode any string. This is the fastest
# way to check for surrogates, see issue 11454 for timings.
# way to check for surrogates, see bpo-11454 (moved to gh-55663) for timings.
try:
s.encode()
return False