// 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 --dead-code-eliminationfunctionfoo(x){Math.abs(x);}foo(1);foo(2);%OptimizeFunctionOnNextCall(foo);assertThrows(function(){foo(Symbol())},TypeError);