HTML entered in source view is garbled when switching out of source view

[Jamie]

When entering the following text in source view:

<iframe src="http://www.example.com"><a href="http://www.example.com">Example</a></iframe>

It is transformed into this when switching out of source view:

<p><iframe src="http://www.example.com">&lt;a data-cke-saved-href=&quot;http://www.example.com&quot; href=&quot;http://www.example.com&quot;&gt;Example&lt;/a&gt;</iframe></p>

Note the escaped HTML entities and the data-cke-saved text for example.

Have reproduced on demo site and nightly demo site in Chrome 43.0.2357.134 m and in ckeditor versions 4.4.7 and 4.3.1

[Jakub Ś]

This is custom CKEditor attribute. This is how editor works and there is no bug here. You can get clean data with ​http://docs.ckeditor.com/#!/api/CKEDITOR.editor-method-getData method.

You can't put any tags inside iframe. Only character data is allowed (no < or >). Please see ​http://www.w3.org/TR/html-markup/iframe.html#iframe

[Jamie]

Thank you for your time. I was not aware that tags within iframe were invalid.