From a23dd4fe4e448d7f696360f2c84c7c57a1ccaacf Mon Sep 17 00:00:00 2001
From: Robert Griesemer <gri@golang.org>
Date: Mon, 1 Apr 2013 15:15:02 -0700
Subject: [PATCH] cmd/godoc: better error message for missing index files

Fixes #5024.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8222045
---
 src/cmd/godoc/godoc.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/cmd/godoc/godoc.go b/src/cmd/godoc/godoc.go
index 6f585fee88..6f9e19d5f9 100644
--- a/src/cmd/godoc/godoc.go
+++ b/src/cmd/godoc/godoc.go
@@ -1517,6 +1517,8 @@ func readIndex(filenames string) error {
 	matches, err := filepath.Glob(filenames)
 	if err != nil {
 		return err
+	} else if matches == nil {
+		return fmt.Errorf("no index files match %q", filenames)
 	}
 	sort.Strings(matches) // make sure files are in the right order
 	files := make([]io.Reader, 0, len(matches))
-- 
2.50.0