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Minor utf32-to-utf8 bug

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  Minor utf32-to-utf8 bug István Pásztor <pasztorpisti@gmail.com> - 2019-11-10 14:07 +0000

#15591 — Minor utf32-to-utf8 bug

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Hi

The encoding of six bytes long utf-8 sequences is buggy. Today unicode
requires at most 4 bytes long utf-8 sequences but if we handle 5 and 6 too
then let's do it the right way.

The attached patch was created using a fresh master clone
(d894cfd104086ddf68c286e67a5fb2e02eb43b7b).

I'm writing a tool (pxargs, an xargs variant) that can accept input strings
in shell-quoted format and used the bash manual and source code as
references. I haven't compiled the latest bash sources to check the bug but
it is likely to affect ANSI-C quoted strings like $'\U7fffffff'.

Best Regards,
Istvan Pasztor

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