From ff8e45828c044665b60c37287e4f2d9e91754333 Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@golang.org>
Date: Tue, 17 Dec 2013 12:25:32 -0800
Subject: [PATCH] os: avoid a string concat in readdir

R=golang-dev, crawshaw
CC=golang-dev
https://golang.org/cl/37690045
---
 src/pkg/os/file_unix.go | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/pkg/os/file_unix.go b/src/pkg/os/file_unix.go
index d49c70c5461..37677e21740 100644
--- a/src/pkg/os/file_unix.go
+++ b/src/pkg/os/file_unix.go
@@ -160,11 +160,10 @@ func (f *File) readdir(n int) (fi []FileInfo, err error) {
 	if dirname == "" {
 		dirname = "."
 	}
-	dirname += "/"
 	names, err := f.Readdirnames(n)
 	fi = make([]FileInfo, 0, len(names))
 	for _, filename := range names {
-		fip, lerr := lstat(dirname + filename)
+		fip, lerr := lstat(dirname + "/" + filename)
 		if IsNotExist(lerr) {
 			// File disappeared between readdir + stat.
 			// Just treat it as if it didn't exist.