Type inference seems to stop at first object property

[spion]

Example to reproduce:

let f a = a.x + a.y
f {x: 1, z: 2}

Version 0.2.2 from npm compiles this to

var f = function (a) {
    return a.x + a.y;
};
f({
    'x': 1,
    'z': 2
});//@ sourceMappingURL=test.js.map