Bug 508129

Description saikarthik Natesan 2016-11-24 10:18:25 EST

On OSX 10.11 (and also in 10.12) after upgrading to Eclipse Neon, our application crashes.  Our application gets GC from PaintEvent and every gc from paintEvent crashes in GC.copyArea(Image image, int x, int y),  This doesn’t  crash for if GC is created.  I guess that scenario got fixed as part of bug 480852. The sample mentioned in bug 480852 works well in Neon. But if I add a canvas and use the gc from PaintListener, it crashes. Please note that the crash happens only in Neon and works well in Luna and Mars. 
 
The following same code/sample works well in Luna & Mars on OSX 10.11. This crashes only on Neon

	Display display = new Display();
	Shell shell = new Shell(display);
	shell.setLayout(new FillLayout());
	Canvas canvas = new Canvas(shell, SWT.NONE);
	canvas.addPaintListener(new PaintListener() {
	 @Override
	  public void paintControl(PaintEvent e) {
	   Shell placeholder = new Shell(((Canvas) e.widget).getShell(), SWT.NO_TRIM);
           Button btn = new Button(placeholder, SWT.CHECK);
	   btn.setSelection(false);
	   Point bsize = btn.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	   btn.setSize(bsize);
	   placeholder.setSize(bsize);
	   btn.setLocation(0, 0);
	   placeholder.open();
           //GC gc = new GC(btn);
	   final Image image = new Image(((Canvas) e.widget).getDisplay(), bsize.x, bsize.y);
	   e.gc.copyArea(image, 0, 0); // Crashing
	   //gc.x(image, 0, 0);
	   placeholder.close();
	  }
	 });
	shell.open();
	while (!shell.isDisposed()) {
	 if (!display.readAndDispatch()) {
	  display.sleep();
	 }
	}
	display.dispose();