CKEditor throw exception when trying to delete bullet

[Roy]

Steps to reproduce

1. Copy and paste the text from the attach file to ckeditor (i try it on the CKEditor home page).
2. try to select empty bullet number 2.
3. press backspace two times.

Expected: we can select bullet 2. and it will be deleted.

Actual: we cannot select bullet 2. bullet 2. is not deleted instead we get the following exception

Exception: ncaught TypeError: Cannot read property 'type' of null

at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.range.moveToElementEditablePosition (ckeditor.js:170) at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.range.moveToElementEditEnd (ckeditor.js:174) at a.<anonymous> (ckeditor.js:1049) at a.d (ckeditor.js:11) at a.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.event.CKEDITOR.event.fire (ckeditor.js:13) at a.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.editor.CKEDITOR.editor.fire (ckeditor.js:14) at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.keystrokeHandler.f (ckeditor.js:229) at $.d (ckeditor.js:11) at $.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.event.CKEDITOR.event.fire (ckeditor.js:13) at HTMLBodyElement.<anonymous> (ckeditor.js:58)

11:01:57.158 ckeditor.js:170 Uncaught TypeError: Cannot read property 'type' of null

at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.range.moveToElementEditablePosition (ckeditor.js:170) at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.range.moveToElementEditEnd (ckeditor.js:174) at a.<anonymous> (ckeditor.js:1049) at a.d (ckeditor.js:11) at a.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.event.CKEDITOR.event.fire (ckeditor.js:13) at a.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.editor.CKEDITOR.editor.fire (ckeditor.js:14) at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.keystrokeHandler.f (ckeditor.js:229) at $.d (ckeditor.js:11) at $.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.event.CKEDITOR.event.fire (ckeditor.js:13) at HTMLBodyElement.<anonymous> (ckeditor.js:58)

I reproduce this defect in the demo CKEditor in ​http://ckeditor.com/