Ticket #52144: 52144.patch

src/wp-includes/post.php

@@ -7344 +7344 @@
                         $terms = get_object_term_cache( $post->ID, $taxonomy );
                         if ( false !== $terms ) {
                                 foreach ( $terms as $term ) {
-                                        if ( ! isset( $term_ids[ $term->term_id ] ) ) {
+                                        if ( ! in_array( $term->term_id, $term_ids ) ) {
                                                 $term_ids[] = $term->term_id;
                                         }
                                 }