1 files changed, 4 insertions, 1 deletions

diff --git a/src/regress/lib/libc/regex/tests b/src/regress/lib/libc/regex/tests
index ab3d10aefe..ee019f0a04 100644
--- a/src/regress/lib/libc/regex/tests
+++ b/src/regress/lib/libc/regex/tests
@@ -1,4 +1,4 @@
-#       $OpenBSD: tests,v 1.7 2016/05/26 13:38:22 schwarze Exp $
+#       $OpenBSD: tests,v 1.8 2016/05/26 14:23:55 schwarze Exp $
 #       $NetBSD: tests,v 1.5 1995/04/20 22:40:00 cgd Exp $
 
 # regular expression test set
@@ -200,6 +200,9 @@ foo\(.*\)bar\1	b	foobar	foobar	""
 \(\(.\)b\)*\1   b       abbbbbba        abbbbb  bb,b
 \(\(.\)b\)*\1   b       abbbbbbbbbbbbbba        abbbbbbbbbbbbb  bb,b
 \(\(.\)b\)*\1   b       abbbbbbbbbbbbbbba       abbbbbbbbbbbbbbb        bb,b
+# these used to segfault, buffer underflow in engine.c, backref()
+\(^a\)*\(b.\)\2 b^      sbxbxe  bxbx    -,bx
+\([[:<:]]a\)*\(b.\)\2   b^      sbxbxe  bxbx    -,bx
 
 # ordinary repetitions
 ab*c            &       abc     abc