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

Cleaning output files:
  out/production/module/A.class
End of files
Exit code: NOTHING_DONE
------------------------------------------
Compiling files:
  src/A.java
End of files
Cleaning output files:
  out/production/module/AChild.class
  out/production/module/META-INF/module.kotlin_module
  out/production/module/UseAKt.class
End of files
Compiling files:
  src/AChild.kt
  src/useA.kt
End of files
Exit code: ABORT
------------------------------------------
COMPILATION FAILED
'f' overrides nothing
Null can not be a value of a non-null type String

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

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