ReportPanic on OS X Yosemite 10.10.2

I run OS X Yosemite 10.10.2 on a first generation 27" iMac. Over night the computer apparently crashed.

All applications I had open had gotten all jumbled in the restart so I pressed the F3 to see every thing and saw the following pop-up message:

I've seen these kind of messages before, but I had never seen them labeled as "ReportPanic".

Can someone explain what this is and what it means? The label gives me pause. Is this a real OS X message or a possible hack?