From ab109ab626fff13962368b22c2008bc310a1f67e Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Mon, 16 Sep 2019 11:37:44 +0200
Subject: [PATCH] SyncruleController: fail nicely in preview

fixes #1941
---
 application/controllers/SyncruleController.php | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/application/controllers/SyncruleController.php b/application/controllers/SyncruleController.php
index 2d6c35ab..ec439f14 100644
--- a/application/controllers/SyncruleController.php
+++ b/application/controllers/SyncruleController.php
@@ -160,7 +160,17 @@ class SyncruleController extends ActionController
         $this->tabs(new SyncRuleTabs($rule))->activate('preview');
         $this->addTitle('Sync Preview');
         $sync = new Sync($rule);
-        $modifications = $sync->getExpectedModifications();
+        try {
+            $modifications = $sync->getExpectedModifications();
+        } catch (\Exception $e) {
+            $this->content()->add(
+                Html::tag('p', [
+                    'class' => 'error'
+                ], $e->getMessage())
+            );
+
+            return;
+        }
 
         if (empty($modifications)) {
             $this->content()->add(Html::tag('p', [