src/java.desktop/unix/classes/sun/awt/X11/XFileDialogPeer.java

*** 785,794 ****
--- 785,797 ----
      }
  
      // 03/02/2005 b5097243 Pressing 'ESC' on a file dlg does not dispose the dlg on Xtoolkit
      @SuppressWarnings("deprecation")
      public void setVisible(boolean b){
+         if (isDisposed()) {
+             return;
+         }
          if (fileDialog == null) {
              init(target);
          }
  
          if (savedDir != null || userDir != null) {