Table seleciton causes exception on a pasted table in certain scenario

[Marek Lewandowski]

This issue is reproducible on our Document Editor demo. I wasn't able to repro it on a regular sample.

Maybe the fact that the editor is placed into a DOM dynamically has something to do?

1. Go to ​Document Editor demo.
2. Make a partial selectiom on the table, say 2x3 cell
3. Copy to clipboard.
4. Move selection into another paragraph.
5. Paste.
6. Try to make table seleciton on a pasted table.

Expected

Our custom selection is being made.

Actual

Exception is thrown:

ckeditor.js?oqkjc5:66 Uncaught TypeError: Cannot read property 'ownerDocument' of undefined
    at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.element.getDocument (ckeditor.js?oqkjc5:66)
    at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.element.getDocumentPosition (ckeditor.js?oqkjc5:108)
    at b (ckeditor.js?oqkjc5:1220)
    at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.document.<anonymous> (ckeditor.js?oqkjc5:1227)
    at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.document.c (ckeditor.js?oqkjc5:11)
    at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.dom.document.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.event.CKEDITOR.event.fire (ckeditor.js?oqkjc5:13)
    at HTMLDocument.<anonymous> (ckeditor.js?oqkjc5:58)

Additional Information

I was able to reproduce it on Chrome, and Edge. Most likely it's reproducible on other browsers too.

[kkrzton]

I got the error on hover over pasted table without selecting. It only happens if table is copied with header row.

[kkrzton]

I was also unable to reproduce it on regular sample even with identical config and build version.

[Marek Lewandowski]

@k.krzton it might be related to the fact that that the editor on demo is attached at runtime. Worth checking out.

[kkrzton]

Replying to m.lewandowski:

@k.krzton it might be related to the fact that that the editor on demo is attached at runtime. Worth checking out.

That might be the case, checking now.

[kkrzton]

It is somehow strange, I run the website locally and used dev version and build version (based on major) with same config and styles and error does not occur then. It occurs only with bundled version. I will check how different are those two builds.

[kkrzton]

Ok, editor for website is built from the special preset ​https://github.com/ckeditor/ckeditor-presets/blob/demo/presets/demo-build-config.js on which the error is reproducible.

[kkrzton]

The minimal set of plugins to reproduce the issue:

config.plugins =
	'table,' +
	'tableresize,' +
	'tableselection,' +
	'toolbar,' +
	'wysiwygarea';

Look like the issue with tablerezise plugin.

[kkrzton]

See ​ckeditor/ckeditor-dev/issues/417.