id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13397	D&D a widget inside its nested widget removes that widget	Szymon Cofalik	Tade0	"When you create a widget inside a widget and then try to drag and drop the upper widget into the nested one, console reports an error and the whole structure disappears from editor.

'''Widget`s definition to use when reproducing:'''
{{{
CKEDITOR.plugins.add( 'mywidget', {
	requires: 'widget',

	init: function( editor ) {
		editor.widgets.add('widgetCast', {
			button: 'Create mywidget',

			template: '<div class=""row layout-row"">\
					 <div class=""c1"" style=""padding:10px;border:1px dashed black;float:left;width:100%;box-sizing:border-box;"">\
						 <p></p>\
					 </div>\
				</div>',

			upcast: function(element) {
				return (element.name == 'div' && element.hasClass('layout-row'));
			},

			editables: {
				c1: {
					selector: '.c1'
				}
			}

		});
	}
} );
}}}
(extra styling for easier reproduction).

'''Steps to reproduce:'''
1. Create instance of mywidget.
2. Create another instance of mywidget into previously created one.
3. Select the first instance.
4. Drag and drop it into nested instance.

'''Result:''' Both widgets disappear.

'''Expected result:''' Dropping a widget inside itself should not be possible and there should be no helping line when trying to do so."	Bug	closed	Normal	CKEditor 4.5.2	General	4.5.0	fixed