Ticket #35610: 35610.patch

wp-includes/comment.php

@@ -2519 +2519 @@
  * Removes comment ID from the comment cache.
  *
  * @since 2.3.0
+ * @since 4.5.0 Added 'clean_comment_cache' action
  *
  * @param int|array $ids Comment ID or array of comment IDs to remove from cache
  */
-function clean_comment_cache($ids) {
+function clean_comment_cache( $ids ) {
         foreach ( (array) $ids as $id ) {
                 wp_cache_delete( $id, 'comment' );
+
+                /**
+                 * Fires once after each taxonomy's term cache has been cleaned.
+                 *
+                 * @since 4.5.0
+                 *
+                 * @param int  $id   Comment ID
+                 */
+                do_action( 'clean_comment_cache', $id );
         }
 
         wp_cache_set( 'last_changed', microtime(), 'comment' );