First of all, welcome Zworf
2nd, thanks for reporting this bug, especially given that its rather critical.
Noone likes w3 crashes.
I aint checked it myself yet, but the building you mentioned was accidentally having abilities it shouldnt.
This may have caused the crash in alpha 9, but its already fixed for beta 0.20
So when i test it for real, ill let you know whether its fixed or not
About your last statement, thanks for your good opinion,
and i can tell you already that COLOSSUS movement speed is 20 higher in alpha 0.20
Its not much, but still 10% faster (20 speed in a dota, is the difference between rhasta -ms and panda -ms).