v8/test/mjsunit/regress/regress-crbug-763683.js

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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.
assertThrows(function test() {
var proxy = new Proxy({}, {});
var key_or_proxy = 0;
function failing_get() {
return proxy[key_or_proxy];
}
failing_get();
key_or_proxy = new Proxy({
toString() {
throw new TypeError('error');
}
}, {});
failing_get();
}, TypeError);