From: Rob Pike <r@golang.org>
Date: Fri, 7 Jan 2011 22:41:33 +0000 (-0800)
Subject: bytes.Buffer: Fix bug in UnreadByte.
X-Git-Tag: weekly.2011-01-12~48
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=353fd1014c78b3b76fb5233f477677e0333e5f1a;p=gostls13.git

bytes.Buffer: Fix bug in UnreadByte.
Error check was inverted.

Fixes #1396.

R=rsc, adg
CC=golang-dev
https://golang.org/cl/3851042
---

diff --git a/src/pkg/bytes/buffer.go b/src/pkg/bytes/buffer.go
index 55d3133868..2574b4f432 100644
--- a/src/pkg/bytes/buffer.go
+++ b/src/pkg/bytes/buffer.go
@@ -291,7 +291,7 @@ func (b *Buffer) UnreadRune() os.Error {
 // read operation.  If write has happened since the last read, UnreadByte
 // returns an error.
 func (b *Buffer) UnreadByte() os.Error {
-	if b.lastRead == opReadRune || b.lastRead == opRead {
+	if b.lastRead != opReadRune && b.lastRead != opRead {
 		return os.ErrorString("bytes.Buffer: UnreadByte: previous operation was not a read")
 	}
 	b.lastRead = opInvalid