==== INITIAL BUILD ====
Compiling files:
  src/bar.kt
  src/constraints.kt
  src/foo.kt
  src/usages.kt
Exit code: OK

==== STEP 1 ====
Compiling files:
  src/usages.kt
Exit code: OK

==== STEP 2 ====
Compiling files:
  src/usages.kt
Exit code: COMPILATION_ERROR
  Unresolved reference 'vala'.
  Unresolved reference 'vara'.
  Unresolved reference 'foo'.
  Unresolved reference 'bar'.