Toggling styles with text selection inside table cell doesn't work correctly

[jacekbogdanski]

Type of report

Bug

Provide detailed reproduction steps (if any)

1. Open console.
2. Open https://ckeditor.com/latest/samples/
3. Add table.
4. Type foo inside a table cell.
5. Select typed text (text selection, not table selection).
6. Press Bold button multiple times.

Expected result

• No errors inside console.
• Bold toggles correctly.

Actual result

• Bold doesn't remove style.
• Error inside console:

ckeditor.js:452 Uncaught DOMException: Failed to execute 'setEnd' on 'Range': There is no child at offset 1.
    at CKEDITOR.dom.selection.selectRanges (https://ckeditor.com/latest/ckeditor.js:452:179)
    at CKEDITOR.style.y (https://ckeditor.com/latest/ckeditor.js:476:243)
    at CKEDITOR.style.remove (https://ckeditor.com/latest/ckeditor.js:479:261)
    at a.removeStyle (https://ckeditor.com/latest/ckeditor.js:487:355)
    at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.command.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.styleCommand.exec (https://ckeditor.com/latest/ckeditor.js:486:155)
    at window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.command.exec (https://ckeditor.com/latest/ckeditor.js:200:395)
    at a.execCommand (https://ckeditor.com/latest/ckeditor.js:268:448)
    at CKEDITOR.ui.button.CKEDITOR.tools.extend.click (https://ckeditor.com/latest/ckeditor.js:650:419)
    at Object.execute (https://ckeditor.com/latest/ckeditor.js:651:497)
    at https://ckeditor.com/latest/ckeditor.js:652:369

Other details

• CKEditor version: 4.10.1
• Installed CKEditor plugins: table, tableselection, basicstyles

[jacekbogdanski]

Duplicate of #941