godoc: diagnostic for empty FS tree

R=adg CC=golang-dev https://golang.org/cl/5615055

godoc: diagnostic for empty FS tree
R=adg CC=golang-dev https://golang.org/cl/5615055
bd41831f · Robert Griesemer · 870c9d1c · bd41831f
Commit bd41831f authored Feb 03, 2012 by Robert Griesemer
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src/cmd/godoc/godoc.go src/cmd/godoc/godoc.go +6 -1

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--- a/src/cmd/godoc/godoc.go
+++ b/src/cmd/godoc/godoc.go
@@ -114,7 +114,12 @@ func registerPublicHandlers(mux *http.ServeMux) {
 }

 func initFSTree() {
-	fsTree.set(newDirectory(filepath.Join(*goroot, *testDir), nil, -1))
+	dir := newDirectory(filepath.Join(*goroot, *testDir), nil, -1)
+	if dir == nil {
+		log.Println("Warning: FSTree is nil")
+		return
+	}
+	fsTree.set(dir)
 	invalidateIndex()
 }