git: don't assume stdout exists on error

When checking the remote URL for a repo, if it errors out, stdout may
not be set.

Fixes #7829.

1 files changed, 6 insertions, 3 deletions

diff --git a/lib/cache/add-remote-git.js b/lib/cache/add-remote-git.js
index cf0a5d4c8..333b929e9 100644
--- a/lib/cache/add-remote-git.js
+++ b/lib/cache/add-remote-git.js
@@ -95,10 +95,13 @@ module.exports = function addRemoteGit (uri, silent, cb) {
       ['config', '--get', 'remote.origin.url'],
       { cwd: cachedRemote, env: gitEnv() },
       function (er, stdout, stderr) {
-        var originURL = stdout.trim()
-        stderr = stderr.trim()
-        log.verbose('addRemoteGit', 'remote.origin.url:', originURL)
+        var originURL
+        if (stdout) {
+          originURL = stdout.trim()
+          log.verbose('addRemoteGit', 'remote.origin.url:', originURL)
+        }
 
+        stderr = stderr.trim()
         if (stderr || er) {
           log.warn('addRemoteGit', 'resetting remote', cachedRemote, 'because of error:', stderr || er)
           return resetRemote(cb)