Ticket #41846: 41846.patch

src/wp-includes/comment-template.php

@@ -1612 +1612 @@
 
         $comment = get_comment( $comment );
 
+        if ( empty( $comment ) ) {
+                return;
+        }
+
         if ( empty( $post ) ) {
                 $post = $comment->comment_post_ID;
         }

tests/phpunit/tests/comment/getCommentReplyLink.php

@@ -26 +26 @@
 
                 $this->assertNull( get_comment_reply_link( $args ) );
         }
+
+        /**
+         * @ticket 
+         */
+        public function test_should_return_null_when_depth_less_than_max_depth_and_comment_null_and_no_current_global_comment() {
+
+                $args = array(
+                        'depth'                 => 1,
+                        'max_depth'             => 2,
+                );
+
+                $comment = null;
+
+                // store current global comment
+                $tmp = $GLOBALS['comment'];
+
+                // remove global current comment
+                unset( $GLOBALS['comment'] );
+                
+                $this->assertFalse( isset( $GLOBALS['comment'] ) ); 
+                $this->assertNull( get_comment_reply_link( $args ), $comment );
+                
+                // restore current global comment
+                $GLOBALS['comment'] = $tmp;
+        }
+
 }