--- old/modules/javafx.controls/src/main/java/javafx/scene/control/Dialog.java	2019-04-06 18:32:53.398272100 +0300
+++ new/modules/javafx.controls/src/main/java/javafx/scene/control/Dialog.java	2019-04-06 18:32:52.957286100 +0300
@@ -249,7 +249,7 @@
      *
      **************************************************************************/
 
-     FXDialog dialog;
+    final FXDialog dialog;
 
     private boolean isClosing;