v8/test/mjsunit/for-of-in-catch-duplicate-decl.js

// 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 []) {} }")
[parser] Track names in VariableDeclarationParsingScope This allows us to stop tracking variables_ in the preparser. This currently makes us track slightly more variables than neccessary in the case `for (var ...` since `var ... of` needs to check conflicts with out simple catch variables. We should probably track the names through a ScopedPtrList instead of a ZonePtrList anyway. Then it won't matter anymore. Change-Id: I64e3f9ab13af8269456439cf15b0bc4d5b9e5380 Reviewed-on: https://chromium-review.googlesource.com/c/1421360 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/heads/master@{#58960} 2019-01-21 12:17:55 +00:00			`// 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.`

[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 05:47:03 +00:00			`assertDoesNotThrow("try { } catch (e) { var e; for (var e of []) {} }")`