IE Quirks Mode: Unspecified Error when making a selection in the editor

[Iliyan]

There is an old bug ​http://dev.ckeditor.com/ticket/9034 fixed 2 years ago, that is reproducible with CKEditor 4.4.4. On IE9 with document mode Quirks, start to select from the beginning of the text and the error rises. I checked the code in version 3.6.5, the fix was in 'selection' plugin, just an try .. catch block around textRng.select(); at line 449. In the current version this code is in the core (file selection.js line 645), the try catch block is absent and error is reproducible again.

[Iliyan]

It is confirmed that the error rises also on IE7 and IE8 in Quirks document mode. A short video is attached.

[Jakub Ś]

I haven't been able to reproduce that.

1. Are you able to reproduce this issue in standalone clean CKEditor out side of your application? By clean I mean CKEditor without any third-party plugins or core code modifications - e.g. full package downloaded from our download page.
   

2. How are you setting the quirks mode? You should not do it through dev-tools (standard user don't use it and results may vary from real quirks mode). Proprer approach is using e.g. no doc-type definition or setting <meta http-equiv="X-UA-Compatible" content="IE=5" />. Please note however that this tag has been deprecated in IE11 (can still be used) and will ignored for public web sites in IE Edge - ​http://stackoverflow.com/questions/6771258/whats-the-difference-if-meta-http-equiv-x-ua-compatible-content-ie-edge-e.

@Iliyan are you perhaps able to prepare reduced HTML sample that I can use with my default CKEditor and see the problem live?