Runtime error: Cast failed. Expected `U`, got `K` (alt/base_virtual_type_check_alt10.nit:37)
J<Tfalse
J<Ufalse
K<Ttrue
K<Utrue
L<Ttrue
L<Utrue
K<T
L<T
K<U
L<U
J<Tfalse
J<Ufalse
K<Tfalse
K<Ufalse
L<Ttrue
L<Utrue
L<T
L<U
J<Tfalse
J<Ufalse
K<Tfalse
K<Ufalse
L<Ttrue
L<Utrue
L<T