Deleting extra space below table and "unlisting" causes JS error

[Jakub Ś]

Reproducible from CKEditor 3.6.4 rev. [7538]. Can also be reproduced in CKEditor 4.x.

1. Open replacebycode sample and clear editor contents
2. Create 3 level list
3. Click at the end of second list item and insert table
4. There will be space below table and last list item
5. Put cursor in this extra space and press delete
6. Last list item will be joined with second one. Now cursor should be at the beginning of text that previously belonged to last list item.
7. Click list button again

Result: table and taxt that previously belonged to last list item disappears and JS error pops out:
Message: Cannot call method 'getParent' of null
Line: 1608
URI: ckeditor/_source/core/dom/range.js

[Jakub Ś]

Viedo showing how to reproduce

[Jakub Ś]

I was able to reproduce this issue in IE and Webkit. In Firefox and Opera HTML result is the same i.e. table is removed but no error is thrown.

[Jakub Ś]

JS error:
Message: Cannot call method 'getParent' of null
URI: /ckeditor4/core/dom/range.js Line: 1523

This ticket looks very similar to #10400. Ticket #10400 throws same error in same line but in every browser.
HTML result for this ticket however is disturbing and IMHO suggests silent fail in 2 other browsers thus I think that both tickets have same fix.