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 // Flags: --allow-natives-syntax 6 7 var x = Object.getOwnPropertyDescriptor({get x() {}}, "x").get; 8 function f(o, b) { 9 if (b) { 10 return o instanceof x; 11 } 12 } 13 14 %OptimizeFunctionOnNextCall(f); 15 f(); 16 17 function g() { 18 return new x(); 19 } 20 21 %OptimizeFunctionOnNextCall(g); 22 assertThrows(()=>g()); 23
