bug#32409: make check fails with glibc-2.28

[Jaroslav Skarvada]

Hi,

just running 'make check' with glibc-2.28 on grep git master results in:
...
XPASS: backref-alt
...
+ grep -E 'b|(.)b|\1|b' in
grep: Invalid back reference
+ status=2
+ test 2 -eq 2
+ grep -E '0|()0|\1|0' in
grep: Invalid back reference
+ status=2
+ test 2 -eq 2
+ Exit 0
...
Testsuite summary for GNU grep 3.1
============================================================================
# TOTAL: 109
# PASS:  101
# SKIP:  6
# XFAIL: 1
# FAIL:  0
# XPASS: 1
# ERROR: 0
============================================================================
See tests/test-suite.log
Please report to address@hidden
============================================================================
make[3]: Leaving directory '/builddir/build/BUILD/grep-3.1/tests'
make[2]: Leaving directory '/builddir/build/BUILD/grep-3.1/tests'
make[1]: Leaving directory '/builddir/build/BUILD/grep-3.1/tests'
make[3]: *** [Makefile:1743: test-suite.log] Error 1
make[2]: *** [Makefile:1851: check-TESTS] Error 2
make[1]: *** [Makefile:2685: check-am] Error 2
make: *** [Makefile:1301: check-recursive] Error 1

>From the inline comment:
# The backslash-alt test fails for glibc, which needs to be fixed.
# FIXME-2015: Remove this once the glibc bug is fixed.
XFAIL_TESTS += backref-alt

so it has been probably fixed in glibc and the test should be
removed

thanks & regards

Jaroslav