We are going to deprecate `WITH_RUNTIME` directive. The main reason
behind this change is that `WITH_STDLIB` directive better describes
its meaning, specifically it will add kotlin stdlib to test's classpath.
When we have a nullable inline class value with non-null underlying
type, corresponding value in unboxed representation is nullable. E.g.:
inline class Str(val value: String)
fun test(s: Str?) = listOf(s)
Here 'test(s: Str?)' accepts nullable 'java.lang.String' as a parameter.
When boxing/unboxing nullable values of such inline classes, take care
of nulls.
#KT-26052 Fixed Target versions 1.3-M2