// Copyright 2019 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: --opt

Debug = debug.Debug

const evaluate = Debug.evaluateGlobalREPL;
const evaluateNonREPL = (source) => Debug.evaluateGlobal(source, false).value();

// Test that a let declared variable 'x' bound by an optimized function is
// updated properly.
evaluate('let x = 42;');

evaluate('function foo() { return x; }');

%PrepareFunctionForOptimization(foo);
foo();
foo();
%OptimizeFunctionOnNextCall(foo);
assertEquals(42, foo());
assertOptimized(foo);

evaluate('let x = 21');
assertEquals(21, foo());

// Test that we do not throw a 'use before declaration error' and
// that the optimized code does not load the hole from the wrong
// script context.
evaluate('x; let x;');
assertEquals(undefined, foo());