WLFilters: avoid querying the DB when filters are in conflict

Bug: T171132
Change-Id: I53843471e3cffb892ca954338983e77a66a46dbb

diff --git a/includes/specials/SpecialWatchlist.php b/includes/specials/SpecialWatchlist.php
index b20b331..effd774 100644 (file)
--- a/includes/specials/SpecialWatchlist.php
+++ b/includes/specials/SpecialWatchlist.php
@@ -415,6 +415,10 @@ class SpecialWatchlist extends ChangesListSpecialPage {
 
                $this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 
+               if ( $this->areFiltersInConflict() ) {
+                       return false;
+               }
+
                return $dbr->select(
                        $tables,
                        $fields,