fix for gofmt rewrite matcher bug

R=rsc CC=golang-dev https://golang.org/cl/179096

fix for gofmt rewrite matcher bug
R=rsc CC=golang-dev https://golang.org/cl/179096
4ddcb0ea · Robert Griesemer · 6a4b2492 · 4ddcb0ea
Commit 4ddcb0ea authored Dec 17, 2009 by Robert Griesemer
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src/cmd/gofmt/rewrite.go src/cmd/gofmt/rewrite.go +3 -0

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--- 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: