See KT-49404 for details
In K1, within SubstitutingScope we approximate almost all the types
containing captured types are being approximated to either a lower or
an upper bound.
While mostly, it's being done correctly there are some problems with
approximations for flexible types
So, the parameter's type of A<in Any>::foo is approximated to Inv<in Any!>,
thus allowing to use Inv<*>, while it's obviously unsound.
NB: For the similar example, in B, there are regular TYPE_MISMATCH
because parameter for B<in Any>::foo is approximated to Nothing
Also, it's important to say that
- in K2 everything works because we don't use type approximation there
- approximation algorithm that works incorrectly is only being used in K1
^KT-54332 Fixed
Denis.Zharkov
31ba1f1534