narrowed objects widen back when passed as arguments

[zpdDG4gta8XKpMCd]

interface A { test: null | string; }
declare const a: A;
declare function fn(a: A & { test: {} }): void;
if (a.test != null) {
    fn(a); // <-- expected to work, actual:
    // Argument of type 'A' is not assignable to parameter of type 'A & { test: {}; }'.
    //   Type 'A' is not assignable to type '{ test: {}; }'.
    //     Types of property 'test' are incompatible.
    //       Type 'string | null' is not assignable to type '{}'.
    //         Type 'null' is not assignable to type '{}'.
}

[RyanCavanaugh]

Same as #10065

[typescript-bot]

Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.