Avoid exceptions for empty titles in addResultToCache() for sanity

Bug: T137083
Change-Id: Ie8aabba30bc0d7a6910a58104ff08ea036ba962d

diff --git a/includes/cache/LinkBatch.php b/includes/cache/LinkBatch.php
index f48e0a5..ec37dd6 100644 (file)
--- a/includes/cache/LinkBatch.php
+++ b/includes/cache/LinkBatch.php
@@ -73,8 +73,8 @@ class LinkBatch {
         * @param string $dbkey
         */
        public function add( $ns, $dbkey ) {
-               if ( $ns < 0 ) {
-                       return;
+               if ( $ns < 0 || $dbkey === '' ) {
+                       return; // T137083
                }
                if ( !array_key_exists( $ns, $this->data ) ) {
                        $this->data[$ns] = [];