tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectLiteralArgs.ts(5,9): error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly. Type argument candidate 'number' is not a valid type argument because it is not a supertype of candidate 'string'. ==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectLiteralArgs.ts (1 errors) ==== function foo(x: { bar: T; baz: T }) { return x; } var r = foo({ bar: 1, baz: '' }); // error ~~~ !!! error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly. !!! error TS2453: Type argument candidate 'number' is not a valid type argument because it is not a supertype of candidate 'string'. var r2 = foo({ bar: 1, baz: 1 }); // T = number var r3 = foo({ bar: foo, baz: foo }); // T = typeof foo var r4 = foo({ bar: 1, baz: '' }); // T = Object