impl/memory: Disallow empty namespace.

impl/memory/info.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package memory
 
 import (
         "fmt"
         "regexp"
 
         "github.com/luci/gae/impl/dummy"
         "github.com/luci/gae/service/info"
         "golang.org/x/net/context"
 )
 
 type giContextKeyType int
 
 var giContextKey giContextKeyType
 
 // validNamespace matches valid namespace names.
-var validNamespace = regexp.MustCompile(`^[0-9A-Za-z._-]{0,100}$`)
+var validNamespace = regexp.MustCompile(`^[0-9A-Za-z._-]{1,100}$`)
 
 var defaultGlobalInfoData = globalInfoData{
         // versionID returns X.Y where Y is autogenerated by appengine, and X is
         // whatever's in app.yaml.
         versionID: "testVersionID.1",
         requestID: "test-request-id",
 }
 
 type globalInfoData struct {
         appid     string
@@ skipping 86 matching lines @@
         return useGID(gi.c, func(mod *globalInfoData) {
                 mod.versionID = v
         })
 }
 
 func (gi *giImpl) SetRequestID(v string) context.Context {
         return useGID(gi.c, func(mod *globalInfoData) {
                 mod.requestID = v
         })
 }