-./base_closure6.nit:55,25--25: Type error: expected U, got V
-./base_closure6.nit:65,8--8: Type error: expected U, got V
+./base_closure6.nit:55,25--25: Type error: no most general type. Got V and U.
+./base_closure6.nit:65,8--8: Type error: no most general type. Got V and U at ./base_closure6.nit:64,8--8.