Today is my unlucky day. There I was, minding my own business, when:
java.lang.AssertionError: Assert failed: Cycle detected on node type editor.code.script/ScriptNode and output :build-targets
(not (contains? (:in-production evaluation-context) [node-id label]))
This happens every time I try to test the project. Any idea of how to… continue using Defold now? 
Found the issue: Two of my modules try to require each other. Aside from spaghetti warning, I suppose this is not allowed?
No, that creates and infinite loop of require().
Just had this error as well and this solution worked for me (didn’t realise looping require() was bad but of course makes sense now that I think about it). There were a couple of other threads with the same error message, but seemingly different root causes (something to do with GUI or factories, for example). Is there a way to make the error message more informative? Or maybe it already is, but I just don’t understand it?