[Bug 289370] wcsxfrm() fails with EINVAL for some characters

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289370

Mark Millard <marklmi26-fbsd@yahoo.com> changed:

           What    |Removed                     |Added
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                 CC|                            |marklmi26-fbsd@yahoo.com

--- Comment #2 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
The issue is documented and far from new:

# man 3 wcsxfrm
WCSXFRM(3)             FreeBSD Library Functions Manual             WCSXFRM(3)
. . .
BUGS
     The current implementation of wcsxfrm() only works in single-byte
     LC_CTYPE locales, and falls back to using wcsncpy() in locales with
     extended character sets.

     Comparing two strings using wcscmp() after wcsxfrm() is not always
     equivalent to comparison with wcscoll(); wcsxfrm() only stores
     information about primary collation weights into dst, whereas wcscoll()
     compares characters using both primary and secondary weights.

FreeBSD 15.0-PRERELEASE         October 4, 2002                     WCSXFRM(3)

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