How do you debug?

I've been finding it quite frustrating making code changes to Zero K due to the fact that errors are silent and there doesn't seem to be a means to print information to somewhere I can see it while testing (I don't understand why "Spring.Echo()" seems to do nothing).
What do you guys do to debug?

DeinFreund : You've no idea how much happier you've made me!

What about messages when loading as opposed to in-game? I've been trying to use echo statements in the weaponsdef_post, but they're not appearing in the F8 debug console.

(aside: I've been finding this a rather steep learning curve at points (the codebase, not the LUA)... I suppose trying to introduce new mechanics might be ambitious for a first change)

infolog.txt is better than the tiny debug console, but the output appears to be buffered. The spring source (rts/System/LogOutput.cpp) talks about a LogFlushLevel option, which can be changed so the infolog.txt gets flushed even for unimportant messages (defaults to errors). Where would I set that?

I usually set springsettings in the Chobby configuration file. Chobby then forwards that to spring.

Note that "LogFlushLevel = 0" has an impact on performance, otherwise it would be enabled generally. Also you're looking for springsettings.cfg.