Yeah, that too. I can run compilerTest task. What I need though is to be able to trace the flow as I learn the code and make small changes. Is there any task that will run the kotlinc with an input file I provide? I'm also not familiar with IntelliJ, are there some resources that describe development process for Kotlin?

You could create your own test with your input file somewhere in compiler tests, depends on what are you trying to test, or start developer IDEA, and look how it resolves/compiles code