function distanceFromOrigin(point) {
    // NOT OK
    var [x, x] = point;
    return Math.sqrt(x*x + y*y);
}

// NOT OK
var { x: x, y: x } = o;

// NOT OK
var { x, x } = o;

// OK
var { x: x, x: y } = o;

// OK
var { p = x, q = x } = o;

function f({
    x: string,
    y: string  // NOT OK
}) {
}

function g({x, y}: {x: string, y: string}) { // OK
}

function blah(arg) {
    var {
        x: x,
        y: {
            x: x, // NOT OK
            y: {
                x: x // NOT OK
            }
        }
    } = arg;
}

function h({x: string, y: string}: any) {  // NOT OK
}