When trying to interact with the tank at all, such as clicking on it, or even just placing a pipe next to it (as I specifically clicked on the ground to place the pipe), it crashes the game. I do have a crash report.

Technically this is SimplePipe's fault (see AlexIIL/SimplePipes#13), but as I made both it's still my fault :p

(Although I'll track this in simple pipes' issue tracker).