<div><div><iframe width="1280" height="720" src="//www.youtube.com/embed/NKvxWMsGW9E?rel=0" frameborder="0" allowfullscreen>blablabla<img src="someimage.gif"></iframe></div></div><div>this div is ok</div>
Output for 5.2.2 - 5.2.4
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/q80mW on line 5
Process exited with code 255.