diff -r 000000000000 -r c4d124ed9f8e patches/glibc/2.9/150-regex-BZ697.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/patches/glibc/2.9/150-regex-BZ697.patch	Sun Apr 19 16:17:11 2009 +0000
@@ -0,0 +1,28 @@
+Original patch from: gentoo/src/patchsets/glibc/2.9/0053_all_glibc-2.9-regex-BZ697.patch
+
+-= BEGIN original header =-
+http://sourceware.org/ml/libc-alpha/2009-01/msg00006.html
+
+From 37bdc055ceeb6b1144c07448a7210d9ab3fbb2f5 Mon Sep 17 00:00:00 2001
+From: Ulrich Drepper <drepper@redhat.com>
+Date: Thu, 8 Jan 2009 00:47:05 +0000
+Subject: [PATCH] (prune_impossible_nodes): Handle sifted_states[0] being NULL also if
+ there are no backreferences.
+
+-= END original header =-
+
+diff -durN glibc-2_9.orig/posix/regexec.c glibc-2_9/posix/regexec.c
+--- glibc-2_9.orig/posix/regexec.c	2007-10-12 19:47:13.000000000 +0200
++++ glibc-2_9/posix/regexec.c	2009-02-02 22:00:43.000000000 +0100
+@@ -1004,6 +1004,11 @@
+       re_node_set_free (&sctx.limits);
+       if (BE (ret != REG_NOERROR, 0))
+ 	goto free_return;
++      if (sifted_states[0] == NULL)
++	{
++	  ret = REG_NOMATCH;
++	  goto free_return;
++	}
+     }
+   re_free (mctx->state_log);
+   mctx->state_log = sifted_states;