Avoid MapCacheLRU error when MessageCache fails to load

Bug: T201893
Change-Id: I6093113a3ffa8092dea3351a6ed6c815c7ff7162

diff --git a/includes/cache/MessageCache.php b/includes/cache/MessageCache.php
index 5c14818..afd24f4 100644 (file)
--- a/includes/cache/MessageCache.php
+++ b/includes/cache/MessageCache.php
@@ -368,7 +368,7 @@ class MessageCache {
                if ( !$success ) {
                        $where[] = 'loading FAILED - cache is disabled';
                        $this->mDisable = true;
-                       $this->cache->set( $code, null );
+                       $this->cache->set( $code, [] );
                        wfDebugLog( 'MessageCacheError', __METHOD__ . ": Failed to load $code\n" );
                        # This used to throw an exception, but that led to nasty side effects like
                        # the whole wiki being instantly down if the memcached server died