From 4ddcb0ea738c181070039db8d9fed9f81958424c Mon Sep 17 00:00:00 2001
From: Robert Griesemer <gri@golang.org>
Date: Thu, 17 Dec 2009 15:23:19 -0800
Subject: [PATCH] fix for gofmt rewrite matcher bug

R=rsc
CC=golang-dev
https://golang.org/cl/179096
---
 src/cmd/gofmt/rewrite.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cmd/gofmt/rewrite.go b/src/cmd/gofmt/rewrite.go
index 94f7912a38b..0fade9f1c1d 100644
--- a/src/cmd/gofmt/rewrite.go
+++ b/src/cmd/gofmt/rewrite.go
@@ -134,6 +134,9 @@ func match(m map[string]reflect.Value, pattern, val reflect.Value) bool {
 
 	p := reflect.Indirect(pattern)
 	v := reflect.Indirect(val)
+	if p == nil || v == nil {
+		return p == nil && v == nil
+	}
 
 	switch p := p.(type) {
 	case *reflect.SliceValue: