Ticket #41846: 41846-2.diff

src/wp-includes/comment-template.php

@@ -1646 +1646 @@
 
         $comment = get_comment( $comment );
 
+        if ( empty( $comment ) ) {
+                return;
+        }
+
         if ( empty( $post ) ) {
                 $post = $comment->comment_post_ID;
         }

tests/phpunit/tests/comment/getCommentReplyLink.php

@@ -66 +66 @@
 
                 $this->assertContains( $expected_url, $comment_reply_link );
         }
+
+        /**
+         * @ticket 41846
+         */
+        public function test_should_return_null_when_depth_less_than_max_depth_and_comment_null_and_no_current_global_comment() {
+
+                // Let max depth be greater than depth and depth be non-zero.
+                $args = array(
+                        'depth'     => 1,
+                        'max_depth' => 2,
+                );
+
+                // Make sure there's no global comment object.
+                add_filter( 'get_comment', '__return_null' );
+
+                $actual = get_comment_reply_link( $args );
+
+                $this->assertNull( $actual );
+        }
+
 }