Re: standards/60369 (mbrtowc, mbrlen have wrong return value for some invalid byte sequences)

[riastradh%NetBSD.org@localhost]

Synopsis: mbrtowc, mbrlen have wrong return value for some invalid byte sequences

State-Changed-From-To: needs-pullups->open
State-Changed-By: riastradh%NetBSD.org@localhost
State-Changed-When: Fri, 26 Jun 2026 21:47:13 +0000
State-Changed-Why:
Looks like this broke some tests we already have -- either need to
fix the tests or fix the fix, not sure which:

https://releng.netbsd.org/b5reports/i386/commits-2026.06.html#build-2026.06.26.11.58.57

Test case: lib/libc/locale/t_mbrtowc/mbrtowc_internal

Duration: 0.003677 seconds
Termination reason

FAILED: Invalid sequence
Standard output stream

Checking string: "ABCD01234_\134"
Using locale: C
Using mbstate: no
First using repeated mbrtowc
Now using mbsrtowcs
Ok.
Checking string: "[\001\177][\200ÿ]["
Using locale: C/en_US.UTF-8/C/C/C/C
Using mbstate: no
First using repeated mbrtowc

Test case: lib/libc/locale/t_mbrtowc/mbrtowc_object

Duration: 0.003976 seconds
Termination reason

FAILED: Invalid sequence
Standard output stream

Checking string: "ABCD01234_\134"
Using locale: C
Using mbstate: yes
First using repeated mbrtowc
Now using mbsrtowcs
Ok.
Checking string: "[\001\177][\200ÿ]["
Using locale: C/en_US.UTF-8/C/C/C/C
Using mbstate: yes
First using repeated mbrtowc

Test case: lib/libc/locale/t_mbstowcs/mbstowcs_basic

Duration: 0.002706 seconds
Termination reason

FAILED: /tmp/build/2026.06.26.11.58.57-i386/src/tests/lib/libc/locale/t_mbstowcs.c:178: (ssize_t)mbstowcs(wbuf, t->data, SIZE-1): Illegal byte sequence
Standard output stream

Checking string: "[\001\177][\200ÿ]["
Using locale: C/en_US.UTF-8/C/C/C/C