strerror() sets errno to ENOMEM unexpectedly on cross builds with glibc 2.28

[Tim Rühsen]

Hi,

at GnuTLS we recently see Debian cross builds failing due to the issue
described in the email subject.

I can't find code in gnulib's strerror.c or strerror-override.c.

But a stand-alone test calling libc's strerror(-3) without gnulib leaves
errno at 0.

$ cat gl/tests/test-strerror.log
../../../gl/tests/test-strerror.c:72: assertion 'errno == 0 || errno ==
EINVAL' failed
qemu: uncaught target signal 6 (Aborted) - core dumped
FAIL test-strerror (exit status: 134)


Maybe someone has an idea what is going on ?

Regards, Tim

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