bug1671563-strict.js

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// A `var` is `undefined` on entering a function body in strict mode too.

"use strict";

load(libdir + "asserts.js");

function f(a = class C{}) {

  var x;

  return x;

assertEq(f(), undefined);

function* g1(a = class C {}) {

  var x;

  assertEq(x, undefined);

g1().next();

function* g2(a = class C {}) {

x;

  let x;

assertThrowsInstanceOf(() => g2().next(), ReferenceError);