From b1ab0b2d52be222fd746b16bc3525b1b872e54d2 Mon Sep 17 00:00:00 2001
From: Herman Schaaf <hermanschaaf@gmail.com>
Date: Fri, 5 Aug 2016 00:16:46 +0800
Subject: [PATCH] Fix edge case with invalid repo names

---
 download/download.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/download/download.go b/download/download.go
index eb73f35..8231146 100644
--- a/download/download.go
+++ b/download/download.go
@@ -77,7 +77,10 @@ func download(path, dest string, firstAttempt bool) (root *vcs.RepoRoot, err err
 func Clean(path string) (string, error) {
 	importPath := trimUsername(trimScheme(path))
 	root, err := vcs.RepoRootForImportPath(importPath, true)
-	if root.Root == "" || root.Repo == "" {
+	if err != nil {
+		return "", err
+	}
+	if root != nil && (root.Root == "" || root.Repo == "") {
 		return root.Root, errors.New("Empty repo root")
 	}
 	return root.Root, err