From 3fb90a86a9aebe164bb4bb0e03f779ef8004d4d5 Mon Sep 17 00:00:00 2001
From: Paul Eggert <address@hidden>
Date: Wed, 26 Jul 2017 09:22:57 -0700
Subject: [PATCH] tests: add Bug#27838 test case

* tests/backref-alt: New test case from a fuzzer.
---
 tests/backref-alt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tests/backref-alt b/tests/backref-alt
index d5bae5c..7bfaf18 100755
--- a/tests/backref-alt
+++ b/tests/backref-alt
@@ -24,4 +24,10 @@ grep -E '0|()0|\1|0' in >out
 status=$?
 test $status -eq 2 || test $status -eq 1 || fail=1
 
+# This fuzz test comes from Bug#27838.
+printf '\1772{\177)\216\216\n\216\216\t\0372{\177)(\037W3|\244\\\220)\0373|d{\244k\220)\0373|(|2{\177)(\037W3|\244\\\220)\0373|d{\244k\220)\0373|d{\220)(\013\0373|2{\177)\216\255\t\216\216\t\0373|$\\2\n' >pat
+LC_ALL=C grep -E -f pat in >out
+status=$?
+test $status -eq 2 || test $status -eq 1 || fail=1
+
 Exit $fail
-- 
2.7.4