json: fix Fatal call in test

R=rsc
CC=golang-dev
https://golang.org/cl/3751041

diff --git a/src/pkg/json/decode_test.go b/src/pkg/json/decode_test.go
index 92c1cafa709a120366113f781fdcdc6806275e1b..2a18a62268c5767a1014b796232729ffef9bed49 100644 (file)
--- a/src/pkg/json/decode_test.go
+++ b/src/pkg/json/decode_test.go
@@ -112,7 +112,7 @@ func TestMarshalBadUTF8(t *testing.T) {
                t.Fatal("Marshal returned data")
        }
        if _, ok := err.(*InvalidUTF8Error); !ok {
-               t.Fatal("Marshal did not return InvalidUTF8Error: %T %v", err, err)
+               t.Fatalf("Marshal did not return InvalidUTF8Error: %T %v", err, err)
        }
 }