A modern programming language that makes developers happier.

kotlinlang

You can disable the DFG phase with ```
kotlin {
    macosX64('macos') {
        compilations.all {
            kotlinOptions {
                freeCompilerArgs += "-Xdisable-phases=Devirtualization,BuildDFG"
            }
        }
    }
}``` (I had a problem too in an earlier version)
To debug you could try the steps I described in another issue I had before: <https://github.com/JetBrains/kotlin-native/issues/2864#issuecomment-504641546>

```e: java.lang.AssertionError: Lowering DCEPhase: phases [Devirtualization] are required, but not satisfied
```

Trying with just `"-Xdisable-phases=BuildDFG"` but I have no idea what I’m doing

Yeah ```e: java.lang.AssertionError: Lowering Devirtualization: phases [BuildDFG] are required, but not satisfied
```

Well I guessed based on the ModuleDFGBuilder in stacktrace and issues I had before in: <https://github.com/JetBrains/kotlin-native/issues/3098>. If it does not work you probably need to debug deeper with the mentioned method to find actual problem.

I found a place where I had the same kind of thing and adding a `get()` worked, we now have a different problem, thanks