bug#50069: grep-3.7 test-regex fails when configured with --without-included-regex

[Klaus Dittrich]

According to configure --help

--without-included-regex
don't compile regex; this is the default on systems
with recent-enough versions of the GNU C Library
(use with caution on other systems).


I have installed glib-2.34 so I assumed --without-included-regex would 
save some time. Instead I got

===============================================
   GNU grep 3.7: gnulib-tests/test-suite.log
===============================================

# TOTAL: 201
# PASS:  192
# SKIP:  8
# XFAIL: 0
# FAIL:  1
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: test-regex
================

free(): invalid pointer
FAIL test-regex (exit status: 134)


Without using this option all run through without any failure.

So is this option deprecated, configure/compile logic wrong or do I have 
overlooked something?

--
Regards Klaus