Crash with aliasing effects in Array.map operator

[sb98052]

One my my test cases for aliasing effects in nested optimized functions crashes Prepack:

function f(c) {
    var arr = Array.from(c);
    
    let a = {foo:1};
	function op(o) {
		return a;
	}
    
    let mapped = arr.map(op);
    mapped[0] = 2;
    let x = a.foo;
    return x;
}

global.__optimize && __optimize(f);

inspect = () => {
  return f([{foo:42}]);
};