download: Properly parse ftp:// URLs that lack user info.

Fixes a regression introduced in
a4f542341511f33ece18d16b68118214da8143ec.

Reported by Hartmut Goebel.

* guix/build/download.scm (ftp-fetch): Account for the case where
'uri-userinfo' returns #f.  Remove the case where it returns "" since
that cannot happen.

1 files changed, 2 insertions, 4 deletions

diff --git a/guix/build/download.scm b/guix/build/download.scm
index c5dddf83de..e3d5244590 100644
--- a/guix/build/download.scm
+++ b/guix/build/download.scm
@@ -241,10 +241,8 @@ and 'guix publish', something like
 (define* (ftp-fetch uri file #:key timeout)
   "Fetch data from URI and write it to FILE.  Return FILE on success.  Bail
 out if the connection could not be established in less than TIMEOUT seconds."
-  (let* ((userinfo (string-split (uri-userinfo uri) #\:))
-         (conn (match userinfo
-                 (("")
-                  (ftp-open (uri-host uri) #:timeout timeout))
+  (let* ((conn (match (and=> (uri-userinfo uri)
+                             (cut string-split <> #\:))
                  (((? string? user))
                   (ftp-open (uri-host uri) #:timeout timeout
                                            #:username user))