The current Ironman server crashes when you try to drop gold.
I've tried to get the 1.1.3 branch version locally, and I can tell it's a struggle to make it compile (there are a ton of errors due to double definitions from common/externs.h and server/externs.h). But I managed to compile it and run a server in Ironman mode. Conclusion: it doesn't crash.
I suggest to recompile a server from scratch because I fear the problem comes from incompatible source code.