From d0a4143c7c45f84d5761fb6ccf31be586b1c887c Mon Sep 17 00:00:00 2001
From: Christopher Baines <mail@cbaines.net>
Date: Sat, 21 Nov 2020 18:31:39 +0000
Subject: [PATCH] Avoid errors in form-horizontal-control

When invalid parameters don't have a message.
---
 guix-data-service/web/view/html.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/guix-data-service/web/view/html.scm b/guix-data-service/web/view/html.scm
index 1e19b6f..40cf60e 100644
--- a/guix-data-service/web/view/html.scm
+++ b/guix-data-service/web/view/html.scm
@@ -253,7 +253,7 @@
                                                (@ (style "display: block;"))
                                                ,(string-append
                                                  "Error: " message)))
-                                           messages)))))
+                                           (filter string? messages))))))
                                '())
                          ,@(if required? '((strong "Required. ")) '())
                          ,@(if help-text