Fix memory leak in regexp compiler (BZ #17069)

posix/bug-regex36.c

@@ -0,0 +1,29 @@
+/* Test regcomp not leaking memory on invalid repetition operator
+   Copyright (C) 2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <mcheck.h>
+#include <regex.h>
+
+int
+main (int argc, char **argv)
+{
+  regex_t r;
+  mtrace ();
+  regcomp (&r, "[a]\\{-2,}", 0);
+  regfree (&r);
+}