v8/test/mjsunit/regress/regress-5164.js

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// Copyright 2016 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: --expose-debug-as debug
var failure = null;
var args;
function listener(event, exec_state, event_data, data) {
if (event != debug.Debug.DebugEvent.Break) return;
try {
args = exec_state.frame(0).evaluate('arguments').value();
} catch (e) {
failure = e;
}
}
debug.Debug.setListener(listener);
function* gen(a, b) {
debugger;
yield a;
yield b;
}
var foo = gen(1, 2);
foo.next()
assertEquals(2, args.length);
assertEquals(undefined, args[0]);
assertEquals(undefined, args[1]);
foo.next()
assertEquals(2, args.length);
assertEquals(undefined, args[0]);
assertEquals(undefined, args[1]);
foo.next()
assertEquals(2, args.length);
assertEquals(undefined, args[0]);
assertEquals(undefined, args[1]);
assertNull(failure);