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

Cleaning output files:
  out/production/module/META-INF/module.kotlin_module
  out/production/module/Super.class
End of files
Compiling files:
  src/Super.kt
End of files
Exit code: OK
------------------------------------------
Cleaning output files:
  out/production/module/Sub.class
End of files
Exit code: NOTHING_DONE
------------------------------------------
Compiling files:
  src/Sub.java
End of files
COMPILATION FAILED
y() in Sub cannot override y() in Super
  overridden method is final