a program that fails only when run as a macOS bundled app

[Alan Snyder]

I’ve run into a strange situation, a tiny Java Swing program that works when 
run from the command line (java -jar) but fails when run as a macOS
bundled app created by the packager. I am using Java 10:

java version "10" 2018-03-20
Java(TM) SE Runtime Environment 18.3 (build 10+46)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10+46, mixed mode)

The specific error appears to involve creating a window with an unsupported set 
of style bits. A similar error is described in JDK-8181476 [1].
NSWindow logs an assertion error. The problem does not arise in Java 8, 
probably because it uses a different set of style bits.

Does anyone have an idea why the behavior would be different for the bundled 
app vs the command line?

Anyone willing to take a look at it?

  Alan


[1] https://bugs.openjdk.java.net/browse/JDK-8181476 
<https://bugs.openjdk.java.net/browse/JDK-8181476>


package test;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class Test
{
 public Test()
 {
  // This frame is always displayed:
  JFrame fr1 = new JFrame("Test 1");
  fr1.getRootPane().putClientProperty("Window.style", "small");
  fr1.setResizable(false);
  fr1.setBounds(0, 0, 200, 200);
  fr1.setVisible(true);

  // This frame fails to display when run as a Java 10 bundled app:
  JFrame fr2 = new JFrame("Test 2");
  fr2.getRootPane().putClientProperty("Window.style", "small");
  fr2.setBounds(300, 0, 200, 200);
  fr2.setVisible(true);
 }

 public static void main(String[] args)
 {
  SwingUtilities.invokeLater(new Runnable()
  {
   public void run()
   {
    new Test();
   }
  });
 }
}