Steps to Reproduce:
1. Enable Minecart Improvements Experimental Features

2. Dispense a stack of carts (18 shown in example)

3. Ride one of the Minecarts

4. Propel the stack forward into a wall

Observed Results:

Game goes kaboom when the stack hits the wall. Upon reloading, the carts (presumably with NaN or motion greater than the 32 bit integer) are removed from the world.

Expected Results:

The stack of carts should stop against the wall, and not instantly crash the game.

Note: May be related to the bug shown by Phoenix SC where the cart teleports the player to a NaN location, however it is currently resulting in a crash for me instead.