#! /bin/sh
# Test whether "grep '.'" matches invalid UTF-8 byte sequences.
#
# Copyright 2019-2023 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.

. "${srcdir=.}/init.sh"; path_prepend_ ../src
require_en_utf8_locale_
require_compiled_in_MB_support

fail=0

printf 'a\360\202\202\254b\n' >in1 || framework_failure_
LC_ALL=en_US.UTF-8 grep 'a.b' in1 > out1 2> err
test $? -eq 1 || fail=1
compare /dev/null out1 || fail=1
compare /dev/null err1 || fail=1

printf 'a\360\202\202\254ba\360\202\202\254b\n' >in2 ||
  framework_failure_
LC_ALL=en_US.UTF-8 grep -E '(a.b)\1' in2 > out2 2> err
test $? -eq 1 || fail=1
compare /dev/null out2 || fail=1
compare /dev/null err2 || fail=1

Exit $fail