fix name lookup change again

[Kingwl]

Fixes #28474

[Kingwl]

something seems wrong, i'll fix that later

[ajafff]

why is this error here? It doesn't reference the inner var bazzzz (var doesn't work any different than let and const in this case). And the outer let bazzzz is definitely not declared after the parameter.

[Kingwl]

@ajafff

 function bar(func = () => foo) {
     let foo = "in";
     return func
}

to

function bar(func) {
    if (func === void 0) { func = function () { return foo; }; }
    var foo = "in";
    return func;
}

and the result is "in" on chrome

[Kingwl]

seems that is not a bug? @weswigham

[weswigham]

Yeah, I'm pretty sure that error reflects the behavior of our actual down level emit rather than the spec.

[Kingwl]

🤷🏻‍♂️ awesome emit