swc/crates/swc_ecma_parser/tests/tsc/classWithoutExplicitConstructor.ts

class C {
    x = 1
    y = 'hello';
}

var c = new C();
var c2 = new C(null); // error

class D<T extends Date> {
    x = 2
    y: T = null;
}

var d = new D();
var d2 = new D(null); // error