From d6f2922e91928b5191a5c5f1b3a6b320712b5ce3 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Tue, 29 Jan 2013 20:52:43 +0000
Subject: libgo: Update Go library to master revision 15489/921e53d4863c.

From-SVN: r195560
---
 libgo/go/regexp/regexp.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libgo/go/regexp/regexp.go')

diff --git a/libgo/go/regexp/regexp.go b/libgo/go/regexp/regexp.go
index bcf354b..c516a15 100644
--- a/libgo/go/regexp/regexp.go
+++ b/libgo/go/regexp/regexp.go
@@ -767,7 +767,7 @@ func (re *Regexp) expand(dst []byte, template string, bsrc []byte, src string, m
 		}
 		template = rest
 		if num >= 0 {
-			if 2*num+1 < len(match) {
+			if 2*num+1 < len(match) && match[2*num] >= 0 {
 				if bsrc != nil {
 					dst = append(dst, bsrc[match[2*num]:match[2*num+1]]...)
 				} else {
-- 
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