Error thrown when inserting block widget in a buggy position

[mlewand]

Are you reporting a feature or a bug?

Bug

Provide detailed reproduction steps (if any)

1. Open widget/manual/block manual test.

2. Put the selection buggy selection after the widget, this requires some clever clicking, see image below:
   

   You need to click somewhere in the margin of the paragraph (2) to put the caret in buggy position (1).

3. Click "doublecolumn" button (the empty one after code snippet button).

Expected result

The widget gets inserted after the image.

Actual result

An exception is being thown:

SCRIPT5007: Unable to get property 'type' of undefined or null reference
ckeditor.js (160,190)

Other details

Note it doesn't have necessairly be a double column widget. Image with caption will cause the same result.

• Browser: IE11, IE9
• OS: Windows 10
• CKEditor version: 4.7.1

This error does not occur on Edge.