Cleaning output files:
out/production/module/Super.class
End of files
Compiling files:
src/Super.java
End of files
Cleaning output files:
out/production/module/Sub.class
End of files
Compiling files:
src/Sub.kt
End of files
COMPILATION FAILED
Kotlin:ERROR:Cannot weaken access privilege 'public' for 'y' in 'Super'
Kotlin:ERROR:'y' hides member of supertype 'Super' and needs 'override' modifier