From 27969e87cfd66ed96e9add7acfab767594535a21 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Mon, 21 Sep 2009 15:44:10 -0700
Subject: [PATCH] add required conversions; bug in compiler let it slip through

R=r
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=34860
CL=34864
---
 src/pkg/image/png/reader.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/pkg/image/png/reader.go b/src/pkg/image/png/reader.go
index d715f0c4a2..4be7e130c9 100644
--- a/src/pkg/image/png/reader.go
+++ b/src/pkg/image/png/reader.go
@@ -62,7 +62,7 @@ type decoder struct {
 type FormatError string
 
 func (e FormatError) String() string {
-	return "invalid PNG format: " + e;
+	return "invalid PNG format: " + string(e);
 }
 
 var chunkOrderError = FormatError("chunk out of order")
@@ -80,7 +80,7 @@ func (e IDATDecodingError) String() string {
 type UnsupportedError string
 
 func (e UnsupportedError) String() string {
-	return "unsupported PNG feature: " + e;
+	return "unsupported PNG feature: " + string(e);
 }
 
 // Big-endian.
-- 
2.48.1