1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 function Foo() {} 6 var x = new Foo(); 7 function foo() { return x instanceof Foo; } 8 assertTrue(foo()); 9 Foo.prototype = 1; 10 assertThrows(foo, TypeError); 11
