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bytes.Buffer: Fix bug in UnreadByte.

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Error check was inverted.

Fixes #1396.

R=rsc, adg
CC=golang-dev
https://golang.org/cl/3851042
This commit is contained in:
Rob Pike 2011-01-07 14:41:33 -08:00
parent 9d634e50c7
commit 353fd1014c
1 changed files with 1 additions and 1 deletions
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2
src/pkg/bytes/buffer.go
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@ -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