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

*** 108,117 ****
--- 108,120 ----
                  filen.getName());
      }
  
      @Override
      public void setVisible(boolean b) {
+         if (isDisposed()) {
+             return;
+         }
          XToolkit.awtLock();
          try {
              quit = !b;
              if (b) {
                  Runnable task = () -> {