This is a bug that works whenever you can see the car select screen and make use of the /track xxx admin command.
The LFS from the admin who used the command will crash.
It's 100% reproducable for me.

Offsets:
00051379 (Multiplayer)
00039D17 (SP)
000FBB7C (HL)

btw. you can disallow cars in the hotlap mode using the /cars xxx cmd