wrong scope in default function parameters

[zayani]

consider this ES6 code:

var x=4;

function i(x=1,c=x)
{
  console.log(c); 
}

i(); //should print 4

var c inside the function should be 4 (x in outer scope) not 1 (x in the function scope), but the complied code give 1

$traceurRuntime.ModuleStore.getAnonymousModule(function() {
  "use strict";
  var x = 4;
  function i() {
    var x = arguments[0] !== (void 0) ? arguments[0] : 1;
    var c = arguments[1] !== (void 0) ? arguments[1] : x;
    console.log(c);
  }
  i(); // print 1
  return {};
});

[domenic]

1 is correct per ES6 spec. Why do you think it should be 4?

[UltCombo]

dupe? #1376

[arv]

This bug is invalid.

#1376 is still a valid bug.

[UltCombo]

@zayani's latter comment contained a valid'ish example, though it looks like that comment has been deleted (?). I've deleted my reply to it as well since it'd make no sense now.

[arv]

Yeah, the x = x case should be covered by the TDZ.