From f39ff80beaab4b366917575e5addcbdd551563c2 Mon Sep 17 00:00:00 2001
From: Alex Brainman <alex.brainman@gmail.com>
Date: Fri, 23 Mar 2012 15:57:19 +1100
Subject: [PATCH] path/filepath: windows drive letter cannot be a digit

R=golang-dev, r
CC=golang-dev, mattn.jp
https://golang.org/cl/5885056
---
 src/pkg/path/filepath/path_test.go    | 1 +
 src/pkg/path/filepath/path_windows.go | 4 +---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/pkg/path/filepath/path_test.go b/src/pkg/path/filepath/path_test.go
index 87cb5e5530..2aba553d23 100644
--- a/src/pkg/path/filepath/path_test.go
+++ b/src/pkg/path/filepath/path_test.go
@@ -814,6 +814,7 @@ type VolumeNameTest struct {
 var volumenametests = []VolumeNameTest{
 	{`c:/foo/bar`, `c:`},
 	{`c:`, `c:`},
+	{`2:`, ``},
 	{``, ``},
 	{`\\\host`, ``},
 	{`\\\host\`, ``},
diff --git a/src/pkg/path/filepath/path_windows.go b/src/pkg/path/filepath/path_windows.go
index 1d1d23bfe7..3dcd030219 100644
--- a/src/pkg/path/filepath/path_windows.go
+++ b/src/pkg/path/filepath/path_windows.go
@@ -35,9 +35,7 @@ func VolumeName(path string) (v string) {
 	}
 	// with drive letter
 	c := path[0]
-	if path[1] == ':' &&
-		('0' <= c && c <= '9' || 'a' <= c && c <= 'z' ||
-			'A' <= c && c <= 'Z') {
+	if path[1] == ':' && ('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z') {
 		return path[:2]
 	}
 	// is it UNC