Ticket #21290: 21290-3.diff

wp-includes/query.php

@@ -2216 +2216 @@
                 if ( $this->is_tax ) {
                         if ( empty($post_type) ) {
                                 $post_type = 'any';
+
+                                // do a fully inclusive search for registered post types of queried taxonomies
+                                $tax_post_types = array();
+                                foreach ( wp_list_pluck( $this->tax_query->queries, 'taxonomy' ) as $tax ) {
+                                        $tax_post_types = array_merge($tax_post_types, get_taxonomy($tax)->object_type);
+                                }
+                                if ( !empty($tax_post_types) ) {
+                                        $post_type = array_unique($tax_post_types);
+                                }
+
                                 $post_status_join = true;
                         } elseif ( in_array('attachment', (array) $post_type) ) {
                                 $post_status_join = true;