Fortunately Diesel fuel has a high enough flash point that it can be mixed about 30/70 with engine oil and run at a moderate no load speed to splash it around inside the engine pretty safely. Kerosene is approaching the limits of safety, flashpoint-wise. I'd definitely avoid putting gas into a crankcase on purpose, whether or not the engine is actually started.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!