Also,

println

statement doesn't work. I don't see the output in "Scratch Output" window.

These might be bugs. Please report to https://youtrack.jetbrains.com/issues/KT also cc: @nastelaz

@pavi2410 there should be Scratch Output toolwindow at the bottom. The full output should be listed here.

@nastelaz Restarting the IDE automagically fixes the output window but it breaks after something happens. (window greys out)