warning: ATTENTION!
This build uses internal compiler arguments:

-XXLanguage:SoundSmartCastAfterTry

This mode is strictly prohibited for production use,
as no stability/compatibility guarantees are given on
compiler or generated code. Use it at your own risk!

warning: incorrect internal argument syntax, missing modificator: -XXLanguage:SoundSmartCastAfterTry
compiler/testData/cli/jvm/legacySmartCastsAfterTry.kt:8:9: error: only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type String?
    some.length
        ^
COMPILATION_ERROR