Ticket #35467: 35467.patch

wp-includes/query.php

@@ -1645 +1645 @@
                 } else {
                         // Look for archive queries. Dates, categories, authors, search, post type archives.
 
-                        if ( isset( $this->query['s'] ) ) {
+                        if ( isset( $this->query['s'] ) && strlen($this->query['s'] )) {
                                 $this->is_search = true;
                         }