| // Copyright 2018 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 Test() { | |
| var f = () => 42; | |
| function modify_f() { | |
| delete f.length; | |
| delete f.name; | |
| var g = Object.create(f); | |
| for (var i = 0; i < 5; i++) { | |
| g.dummy; | |
| } | |
| } | |
| %EnsureFeedbackVectorForFunction(f); | |
| assertTrue(%HasFastProperties(f)); | |
| var h = f.bind(this); | |
| })(); |