Re: [PATCH] fstatat: support NULL if AT_EMPTY_PATH

Bruno Haible via Gnulib discussion list <[email protected]> Tue, 23 Jun 2026 20:01:55 +0200

Newsgroups	gmane.comp.lib.gnulib.bugs
Message-ID	<9767663.CDJkKcVGEf@cagnes>

Hi Paul,

Yesterday's CI of GNU m4 (newest m4 sources, newest gnulib sources, on
Alpine Linux) shows a test failure:


FAIL: test-fstatat
==================

Segmentation fault (core dumped)
FAIL test-fstatat (exit status: 139)


I reproduce it in Alpine Linux 3.24.1 (but not in 3.22 nor 3.20).
The backtrace is:
  test-fstatat.c:111
    -> musl/src/stat/fstatat.c:147
       -> musl/src/stat/fstatat.c:81

That line reads:
        if (flag==AT_EMPTY_PATH && fd>=0 && !*path) {

Bruno