Heh, well thanks then, I guess. Will it be an error popup or just the command being ignored?

Also, is there any way to tell what causes the game to hang without uploading the dump? Would've saved a lot of time.

When a unit group with zero members receives a command of type defines.command.build_base a crash (well, moreso the game just hangs) occurs. I've attached my log (although probably not applicable here) and a mod for demonstration purposes. This should work independent of save, so none attached. Just...