World crashes from Perfect Interfaces (bus and block)

[Chaos0Sage]

There are problems with Perfect Interfaces, specifically with block and bus.

1. If you place a block, then world crashes, without being able to enter in world back.
2. In case of bus, it's just enough to pick it up (allocate a slot with bus) and world crashes. If you place it up, the crash also occurs, but you can enter in world, and bus will not appear in world and will remain in your hand.

Crash Report: Perfect Interface Block
Crash Report: Perfect Interface Bus