v8/test/message/fail/for-of-throw-in-body.js

// 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.

for (var x of [1, 2, 3]) { throw 42 }
Preserve exception message in iterator finalization. The parser uses a try-catch in order to record when the client of an iterator throws. The exception then used to get rethrown via 'throw', which unfortunately resulted in the original exception message object getting overwritten. This CL solves this as follows: - add a clear_pending_message flag to TryCatchStatement (set to true in normal cases), - set clear_pending_message to false for the TryCatchStatement used in iterator finalization - change full-codegen, turbofan, and the interpreter to emit the ClearPendingMessage call only when the flag is set, - replace 'throw' with '%ReThrow' in the iterator finalization code, thus reusing the (not-cleared) pending message R=littledan@chromium.org, mstarzinger@chromium.org, yangguo@chromium.org BUG=v8:4875 LOG=n Review URL: https://codereview.chromium.org/1842953003 Cr-Commit-Position: refs/heads/master@{#35226} 2016-04-04 08:14:57 +00:00			`// 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.`

			`for (var x of [1, 2, 3]) { throw 42 }`