================ Step #1 =================

Cleaning output files:
  out/production/module/META-INF/module.kotlin_module
  out/production/module/foo/A.class
End of files
Compiling files:
  src/A.kt
End of files
Marked as dirty by Kotlin:
  src/AChild.kt
  src/useAChild.kt
Exit code: ADDITIONAL_PASS_REQUIRED
------------------------------------------
Cleaning output files:
  out/production/module/META-INF/module.kotlin_module
  out/production/module/foo/AChild.class
  out/production/module/foo/UseAChildKt.class
End of files
Compiling files:
  src/AChild.kt
  src/useAChild.kt
End of files
Exit code: ABORT
------------------------------------------
COMPILATION FAILED
Null can not be a value of a non-null type Any

================ Step #2 =================

Cleaning output files:
  out/production/module/foo/A.class
End of files
Compiling files:
  src/A.kt
  src/AChild.kt
  src/useAChild.kt
End of files
Exit code: OK
------------------------------------------