close #1542 don't chown if uid/gid aren't numbers

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/cache.js b/lib/cache.js
index dc4d0def2..6cf188c30 100644
--- a/lib/cache.js
+++ b/lib/cache.js
@@ -603,7 +603,9 @@ function addPlacedTarball_ (p, name, uid, gid, cb) {
             log.verbose(FMODE.toString(8), "chmod "+f)
             fs.chmod(f, FMODE, cb)
           }, function (f, cb) {
-            fs.chown(f, uid, gid, cb)
+            if (typeof uid === "number" && typeof gid === "number") {
+              fs.chown(f, uid, gid, cb)
+            } else cb()
           }, function (er) {
             cb(er, data)
           })