id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
14671	Undo/redo widget bug	Andrew		"== Steps to reproduce ==

1. go to the simplebox example at: http://ckeditor.com/demo#widgets
2. enter a fair amount of text into the content section of the simplebox example
3. after N amount of redo/undo (CTRL+Z / CTRL + Y on the linked page but also the undo/redo buttons on my own project) the error 'IndexSizeError: Index or size is negative or greater than the allowed amount' will be thrown for any undo/redo from then on.

== Expected result ==
Expected to undo/redo without errors

== Actual result ==
Errors are thrown when undo/redo is used after a certain amount of calls within the editable area of an editable widget

== Other details (browser, OS, CKEditor version, installed plugins) ==
As mention above, this happens with both CTRL+Z/CTRL+Y and undo/redo buttons on the editor.
Browsers: Chrome 50.0.2661.102
Firefox: 46.0.1
IE 11: 11.0.0

This bug will be triggered 100% of the time albeit with variable amount of undo/redo calls (can be within the first 5 or so or up to 20+ calls)."	Bug	closed	Normal		UI : Widgets		expired