tests/cases/compiler/genericInterfacesWithoutTypeArguments.ts(3,8): error TS2314: Generic type 'I' requires 1 type argument(s). tests/cases/compiler/genericInterfacesWithoutTypeArguments.ts(4,10): error TS2314: Generic type 'I' requires 1 type argument(s). ==== tests/cases/compiler/genericInterfacesWithoutTypeArguments.ts (2 errors) ==== interface I { } class C { } var i: I; ~ !!! error TS2314: Generic type 'I' requires 1 type argument(s). var c: C; ~ !!! error TS2314: Generic type 'I' requires 1 type argument(s).