Version 4.8.271.18 (cherry-pick)

Merged 953bb41

Ensure arrow functions can close over lexically-scoped variables

BUG=chromium:580934, v8:4255
LOG=N
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/1649393003 .

Cr-Commit-Position: refs/branch-heads/4.8@{crosswalk-project#21}
Cr-Branched-From: 10449d4-refs/heads/4.8.271@{#1}
Cr-Branched-From: 2ebd5fc-refs/heads/master@{#31941}

include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 4
 #define V8_MINOR_VERSION 8
 #define V8_BUILD_NUMBER 271
-#define V8_PATCH_LEVEL 17
+#define V8_PATCH_LEVEL 18
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

src/preparser.h

@@ -3926,7 +3926,7 @@ ParserBase<Traits>::ParseArrowFunctionLiteral(
       // Multiple statement body
       Consume(Token::LBRACE);
       bool is_lazily_parsed =
-          (mode() == PARSE_LAZILY && scope_->AllowsLazyCompilation());
+          (mode() == PARSE_LAZILY && scope_->AllowsLazyParsing());
       if (is_lazily_parsed) {
         body = this->NewStatementList(0, zone());
         this->SkipLazyFunctionBody(&materialized_literal_count,

test/mjsunit/regress/regress-crbug-580934.js

@@ -0,0 +1,18 @@
+// 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: --min-preparse-length=0
+
+"use strict";
+{
+  let one = () => {
+    return "example.com";
+  };
+
+  let two = () => {
+    return one();
+  };
+
+  assertEquals("example.com", two());
+}