Error thrown while opening WSC dialog

[Tade0]

Bug in CKEditor: http://dev.ckeditor.com/ticket/13947

Steps to reproduce

1. Open CKEditor (hash: b34ea4de6106ce5513da723ba42c3ba52da7424a) with WSC plugin (hash: d25e336)
2. Click "Check spelling".

Expected result

Dialog is created, no errors.

Actual result

Sometimes there's an Object doesn't support property or method 'isVisible' error thrown in the console.

Error is thrown in this line:
https://github.com/ckeditor/ckeditor-dev/blob/d277ad1230d5e269a309ece0723eebcd5efd8282/plugins/dialogui/plugin.js#L934

Other details (browser, OS, CKEditor version, installed plugins)

IE11, Win 8.1, CKEditor 4.5.5

[WebSpellChecker]

Can't reproduce. Could you please describe more clear steps.

[AAbakumov]

@Tade0 any updates on this?

[f1ames]

I think I am able to provide more specific steps to reproduce the issue:

1. Open the editor with WSC plugin.
2. Set content to <p>an instance of ...</p>.
3. Open WSC dialog and go to Thesaurus tab.
4. Replace instance with some other word.
5. Close dialog by clicking Finish Checking.
6. Open WSC dialog.

Error is thrown:

Tested with CKEditor ckeditor/ckeditor4@2e815d0 and WSC 4.8.7.0.

[AAbakumov]

Dear @f1ames ,

We tried to reproduce the issue with your steps but without any success.
We would like to find out the root cause of this issue. That's why we need your help:

1. Could you please specify if there are any other editors on the page except CKEditor?
2. Could you please provide the html code of the page or give us an access to the test environment where this issue can be reproduced?

Thank you and sorry for any inconveniences.

We are looking forward to your reply.
Regards,
The WebSpellChecker QA Team

[f1ames]

Thank you for validating the issue, the exact steps on my side to reproduce the issue:

1. Clone the latest ckeditor-dev/major (ckeditor/ckeditor4@191a21f).
2. Go to ./ckeditor-dev/plugins/ and clone WSC there (edc4af5) as ./wsc.
3. Open ./ckeditor-dev/config.js and add wsc to config.plugins so the plugin will be included.
4. Open ./ckeditor-dev/samples/index.html in a browser (I used Chrome 57.0.2987.133 (64-bit) on OSX).
5. Switch to Source mode in CKEditor.
6. Replace whole content with <p>an instance of ...</p>.
7. Switch back to WYSIWYG mode.
8. Open WSC dialog and go to Thesaurus tab.
9. Replace instance with ideal (using Change to button).
10. Close dialog by clicking Finish Checking.
11. Open WSC dialog.

After the 11th step, error mentioned in my previous comment is thrown.

[AAbakumov]

Dear @f1ames ,

Thank you so much for such detailed steps. We were able to reproduce the issue. The problem comes out when we use the Source mode in the CKEditor.

I have created a task for our Dev Team and notified them.

Thank you so much for your help!
Sincerely,
The WebSpellChecker QA Team

[f1ames]

@wsc-bug-hunter, I am glad it was helpful and made possible to reproduce the issue. If any more information is needed I am here to help.
Waiting for the update on the issue.

[AAbakumov]

Dear @f1ames,
We are glad to inform you that issue with the console error has been fixed and will be released in the middle of May with the product version 4.8.9.

Thank you so much for your patience and your help.

Sincerely,
The WebSpellChecker QA Team

[f1ames]

Thank you for the quick fix!