v8/test/mjsunit/es6/regress/regress-4160.js

// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flags: --allow-natives-syntax

(function(x) {
  (function(x) {
    var boom = (() => eval(x));
    %PrepareFunctionForOptimization(boom);
    assertEquals(23, boom());
    assertEquals(23, boom());
    %OptimizeFunctionOnNextCall(boom);
    assertEquals(23, boom());
    assertEquals("23", x);
  })("23");
  assertEquals("42", x);
})("42");

(function(x) {
  (function(x) {
    var boom = (() => (eval("var x = 66"), x));
    %PrepareFunctionForOptimization(boom);
    assertEquals(66, boom());
    assertEquals(66, boom());
    %OptimizeFunctionOnNextCall(boom);
    assertEquals(66, boom());
    assertEquals("23", x);
  })("23");
  assertEquals("42", x);
})("42");