[3.13] Correctly fold unknown-8bit originating from encoded words. (GH-142517) #143147
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…-142517) The unknown-8bit trick was designed to deal with unknown bytes in an ASCII message, and it works fine for that. However, I also tried to extend it to handle bytes that can't be decoded using the charset specified in an encoded word, and there it fails because there can be other non-ASCII characters that were *successfully* decoded. The fix is simple: do the unknown-8bit encoding using the utf-8 codec. This is especially appropriate since anyone trying to do recovery on an unknown byte string will probably attempt utf-8 first. (cherry picked from commit 1e17ccd) Co-authored-by: R. David Murray <rdmurray@bitdance.com>
Misc/NEWS.d/next/Library/2025-12-10-10-00-06.gh-issue-142517.fG4hbe.rst
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…G4hbe.rst Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
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The unknown-8bit trick was designed to deal with unknown bytes in an
ASCII message, and it works fine for that. However, I also tried to
extend it to handle bytes that can't be decoded using the charset
specified in an encoded word, and there it fails because there can be
other non-ASCII characters that were successfully decoded. The fix is
simple: do the unknown-8bit encoding using the utf-8 codec. This is
especially appropriate since anyone trying to do recovery on an unknown
byte string will probably attempt utf-8 first.
(cherry picked from commit 1e17ccd)
Co-authored-by: R. David Murray rdmurray@bitdance.com