fix bug when no block existis

src/View/Twig.php

@@ -34,7 +34,11 @@ class Twig
     public function addBlockVariable($block, $data)
     {
         $current = $this->variables[$block];
-        $new = array_merge($current, $data);
+        if ($current) {
+            $new = array_merge($current, $data);
+        } else {
+            $new = $data;
+        }
         $this->variables[$block] = $new;
     }