Spawning doors in waterworld causes Gmod to crash

When I spawn a prop door in one of the waterworld maps (waterworld and rp_waterworldnew), Gmod crashes out. I don’t see why it isn’t crashing when I spawn anything else, it just seems to be doors.

This happens in single and multiplayer, and only happens on these maps. Construct and flatgrass work fine.

I’m running Windows 7* on a Pentium E5200, 4GB RAM, HD4850 512MB.

*Windows 7 isn’t the problem, a few friends have noticed this crashing as well.

Try sending the minidump to garry?

comment removed due to embarrassment