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// Copyright 2017 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 foo(o) {
try {
for (var x in o) {}
return false;
} catch (e) {
return true;
}
}
%PrepareFunctionForOptimization(foo);
var o = new Proxy({a:1},{
getOwnPropertyDescriptor(target, property) { throw target; }
});
assertTrue(foo(o));
assertTrue(foo(o));
%OptimizeFunctionOnNextCall(foo);
assertTrue(foo(o));
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