From 9e735985d42368de01fbef63af713cb8675bdffa Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Fri, 30 Jan 2009 16:31:26 -0800
Subject: [PATCH] avoid memcpy(x, x), which valgrind complains about.

R=ken
OCL=23990
CL=23990
---
 src/cmd/gc/walk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c
index 24a3a39c27..6e959b8c7a 100644
--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -170,7 +170,7 @@ loop:
 void
 indir(Node *nl, Node *nr)
 {
-	if(nr != N)
+	if(nr != N && nl != nr)
 		*nl = *nr;
 }