10000 gh-136052: Do not generate empty encoded-words by chrullrich · Pull Request #136098 · python/cpython · GitHub
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gh-136052: Do not generate empty encoded-words #136098

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gh-136052: Do not generate empty encoded-words #136098

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Do not generate empty encoded-words
chrullrich Jun 29, 2025
65f60fd
Add NEWS
tradlux-chul Jun 29, 2025
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Do not generate empty encoded-words 
Fixes #136052.
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@chrullrich
chrullrich committed Jun 29, 2025
commit aba98083e081411dac595976468ff90b7a31ec32
5 changes: 4 additions & 1 deletion Lib/email/_header_value_parser.py
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Expand Up @@ -3011,7 +3011,10 @@ def _fold_as_ew(to_encode, lines, maxlen, last_ew, ew_combine_allowed, charset,
to_encode_word = to_encode_word[:-1]
encoded_word = _ew.encode(to_encode_word, charset=encode_as)
excess = len(encoded_word) - remaining_space
lines[-1] += encoded_word
# If encoding a single character pushes this line over the limit,
# give up on it and go to the next line.
if to_encode_word != "":
lines[-1] += encoded_word
to_encode = to_encode[len(to_encode_word):]
leading_whitespace = ''

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