void () { doTestByText(""" from typing import Generic, TypeVar T = TypeVar('T') class C(Generic[T, <error descr="Parameters to 'Generic[...]' must all be unique">T</error>]): pass B = Generic class A(B[T, <error descr="Parameters to 'Generic[...]' must all be unique">T</error>]): pass T1 = T class D(Generic[T1, <error descr="Parameters to 'Generic[...]' must all be unique">T</error>]): pass"""); }