Ticket #39650: 39650.2.patch

wp-includes/comment-template.php

@@ -2165 +2165 @@
  * @param int|WP_Post $post_id Post ID or WP_Post object to generate the form for. Default current post.
  */
 function comment_form( $args = array(), $post_id = null ) {
+        //Don't show comment form if post status is not publish.
+        if ( 'draft' === get_post_status( $post ) ) {
+                return;
+        }
+        
         if ( null === $post_id )
                 $post_id = get_the_ID();