calling destroy() throws an error when image dialog is open

[Paul Korzhyk]

This started happening in 4.2, reproducible in Chrome and Firefox. For some reason, when dialog tries to hide coverElement, it is already gone from the focusManager.

Uncaught TypeError: Cannot read property 'blur' of null

in

CKEDITOR.focusManager.remove - ckeditor.js:198

Steps to reproduce:

1. open attached html file (it loads ckeditor & jquery from cdnjs)
2. click "Go!"
3. click "Image" in the ckeditor toolbar.
4. Wait for 10 second countdown to end.

Observed Result: white dialog cover stays on screen, error printed to the dev console. Expected Result: exact opposite of "Observed Result".

[Jakub Ś]

Problem can be reproduced from CKEditor 4.0 beta. This works fine in CKE 3.x.

JS ERROR:
TypeError: listeners is null
Code: element.removeListener( 'blur', listeners.blur );
Line:218
URI: /ckeditor4/core/focusmanager.js

[frattaro]

Experienced this in 4.4.7 using a modified version of the templates plugin (modified to handle a page containing multiple inline instances, and clearing the parent container's html, replacing dynamic instances with new instances as specified by template).

As a work around, I called the following function before redrawing the page:

CKEDITOR.dialog.getCurrent().hide();