Index: src/wp-admin/includes/class-wp-comments-list-table.php
===================================================================
--- src/wp-admin/includes/class-wp-comments-list-table.php	(revision 36338)
+++ src/wp-admin/includes/class-wp-comments-list-table.php	(working copy)
@@ -499,7 +500,7 @@
 		$this->single_row_columns( $comment );
 		echo "</tr>\n";

-		unset( $post, $comment );
+		unset( $GLOBALS['post'], $GLOBALS['comment'] );
 	}

  	/**