FakeCallableDescriptorForObject instance, which is not ConstructorDescriptor,
is checked with call checkers when object's contents are being used.
Checker of missing supertypes should not be run against this fake descriptor.
Object's members belong to separate member scope, so their resolution doesn't
force containing class' supertypes evaluation. I.e. object's methods
may work fine even if some supertypes of containing class are missing.
Pavel Kirpichenkov
55b3637f03