v8/for-of-in-catch-duplicate-decl.js at 0a31d508f1b311ef8a910cd1f493dd3742159e1f - v8 - Gitea: Git with a cup of tea

AuroraMiddleware/v8

Mathias Bynens b645a259bd [parser] Allow try {} catch (e) { for (var e of x) {} }

This patch changes the parser to allow for-of initializer
var-redeclaration of non-destructured catch parameters.

Previously, the spec allowed var-redeclaration of a
non-destructured catch parameter…

    try {} catch (e) { var e; }

…except in the particular case where the var declaration is
a for-of initializer:

    try {} catch (e) { for (var e of whatever) {} }

https://github.com/tc39/ecma262/pull/1393 removes this strange
exceptional case. This patch implements that change.

BUG=v8:8759

Change-Id: Ia4e33ac1eab89085f8a5fdb547f479cfa38bbee5
Reviewed-on: https://chromium-review.googlesource.com/c/1444954
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59209}

2019-01-30 14:20:58 +00:00

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 // Copyright 2019 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.
 assertDoesNotThrow("try { } catch (e) { var e; for (var e of []) {} }")