No Arguments Two-Way Binding

In sloppy mode, functions with simple parameter list have their parameters two-way bound with the arguments object. This means that changes to the arguments object are reflected by the parameter values and vice versa. Aran does not preserve this (crazy) behavior. If this becomes a real issue, it could be possible to implement it with the Proxy API.

function f(x) {
  console.log(1, { x, arg0: arguments[0] });
  arguments[0] = "bar";
  console.log(2, { x, arg0: arguments[0] });
  x = "qux";
  console.log(3, { x, arg0: arguments[0] });
}
f("foo");

Normal output:

1 { x: 'foo', arg0: 'foo' }
2 { x: 'bar', arg0: 'bar' }
3 { x: 'qux', arg0: 'qux' }

Aran output:

1 { x: 'foo', arg0: 'foo' }
2 { x: 'foo', arg0: 'bar' }
3 { x: 'qux', arg0: 'bar' }