crashy.cs

using System;
using AppKit;
using Foundation;

namespace HelloMac
{
	//TO REPRO:
	// 1. Click on the botton
	// 2. Close the window that pops up
	// May have to repeat 2-3 times
	public partial class ViewController : NSViewController
	{
		public ViewController (IntPtr handle) : base (handle) { }

		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			base.View.AddSubview (NSButton.CreateButton ("Crash me", OpenChildWindow));
		}

		void OpenChildWindow ()
		{
			var windowDelegate = new CrashyDelegate ();
			var frame = View.Window.Frame;
			frame.Offset (20, 20);
			NSWindow win = new NSWindow (frame, NSWindowStyle.Titled | NSWindowStyle.Closable | NSWindowStyle.Resizable, NSBackingStore.Buffered, true) {
				WeakDelegate = windowDelegate
			};
			NSApplication.SharedApplication.RunModalForWindow (win);
			GC.Collect ();
		}

		class CrashyDelegate : NSWindowDelegate
		{
			public override void WillClose (NSNotification notification)
			{
				// uncomment this line to fix the crash
				// notification.DangerousRetain ();
				NSApplication.SharedApplication.StopModal ();
			}
		}
	}
}