#! /bin/sh
# Test for a bug in glibc's regex code as of September 7, 2014.
#
# Copyright (C) 2014-2023 Free Software Foundation, Inc.
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.

# This tickles a bug in the regex code that can cause heap violations etc.
# A fix would be welcome, though fixing is not trivial.  See:
# https://sourceware.org/bugzilla/show_bug.cgi?id=11053

. "${srcdir=.}/init.sh"; path_prepend_ ../src
require_timeout_

echo a > in || framework_failure_

fail=0

# Clear this, so glibc doesn't bother to produce a core dump.
MALLOC_CHECK_=

warn_ "$ME_: expect malfunction on glibc systems due to" \
   "https://sourceware.org/bugzilla/show_bug.cgi?id=11053"

# While with glibc-2.35, it no longer aborts, the empty result is still wrong:
timeout 10 grep -E '(.?)(.?)(.?)\3\2\1' in > out || fail=1
compare out in || fail=1

Exit $fail