Assertion: Avoid endless loop in case of circular class inheritance.
Assertion: Avoid endless loop in case of circular class inheritance.

This commit does not solve the root cause (incomplete circularity detection), see FIXME.

khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift