From addb30f0c99dd6e1a14e9b39b8688f37fc5047db Mon Sep 17 00:00:00 2001
From: Mestery <mestery@pm.me>
Date: Sun, 29 Aug 2021 16:03:36 +0200
Subject: [PATCH] repl: fix top level await with surrogate characters

Fixes: https://github.com/nodejs/node/issues/39929

PR-URL: https://github.com/nodejs/node/pull/39931
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
---
 lib/internal/repl/await.js                     |  3 +--
 .../test-repl-preprocess-top-level-await.js    | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/lib/internal/repl/await.js b/lib/internal/repl/await.js
index f28a7ea412bc3f..ba138fdfe8c8d9 100644
--- a/lib/internal/repl/await.js
+++ b/lib/internal/repl/await.js
@@ -1,7 +1,6 @@
 'use strict';
 
 const {
-  ArrayFrom,
   ArrayPrototypeForEach,
   ArrayPrototypeIncludes,
   ArrayPrototypeJoin,
@@ -155,7 +154,7 @@ for (const nodeType of ObjectKeys(walk.base)) {
 function processTopLevelAwait(src) {
   const wrapPrefix = '(async () => { ';
   const wrapped = `${wrapPrefix}${src} })()`;
-  const wrappedArray = ArrayFrom(wrapped);
+  const wrappedArray = StringPrototypeSplit(wrapped, '');
   let root;
   try {
     root = parser.parse(wrapped, { ecmaVersion: 'latest' });
diff --git a/test/parallel/test-repl-preprocess-top-level-await.js b/test/parallel/test-repl-preprocess-top-level-await.js
index 93d3d79a87bb08..656b616b71d9e6 100644
--- a/test/parallel/test-repl-preprocess-top-level-await.js
+++ b/test/parallel/test-repl-preprocess-top-level-await.js
@@ -9,17 +9,31 @@ const { processTopLevelAwait } = require('internal/repl/await');
 // This test was created based on
 // https://cs.chromium.org/chromium/src/third_party/WebKit/LayoutTests/http/tests/inspector-unit/preprocess-top-level-awaits.js?rcl=358caaba5e763e71c4abb9ada2d9cd8b1188cac9
 
+const surrogate = (
+  '"\u{1F601}\u{1f468}\u200d\u{1f469}\u200d\u{1f467}\u200d\u{1f466}"'
+);
+
 const testCases = [
   [ '0',
     null ],
   [ 'await 0',
     '(async () => { return (await 0) })()' ],
+  [ `await ${surrogate}`,
+    `(async () => { return (await ${surrogate}) })()` ],
   [ 'await 0;',
     '(async () => { return (await 0); })()' ],
+  [ `await ${surrogate};`,
+    `(async () => { return (await ${surrogate}); })()` ],
+  [ `await ${surrogate};`,
+    `(async () => { return (await ${surrogate}); })()` ],
   [ '(await 0)',
     '(async () => { return ((await 0)) })()' ],
+  [ `(await ${surrogate})`,
+    `(async () => { return ((await ${surrogate})) })()` ],
   [ '(await 0);',
     '(async () => { return ((await 0)); })()' ],
+  [ `(await ${surrogate});`,
+    `(async () => { return ((await ${surrogate})); })()` ],
   [ 'async function foo() { await 0; }',
     null ],
   [ 'async () => await 0',
@@ -28,8 +42,12 @@ const testCases = [
     null ],
   [ 'await 0; return 0;',
     null ],
+  [ `await ${surrogate}; await ${surrogate};`,
+    `(async () => { await ${surrogate}; return (await ${surrogate}); })()` ],
   [ 'var a = await 1',
     'var a; (async () => { void (a = await 1) })()' ],
+  [ `var a = await ${surrogate}`,
+    `var a; (async () => { void (a = await ${surrogate}) })()` ],
   [ 'let a = await 1',
     'let a; (async () => { void (a = await 1) })()' ],
   [ 'const a = await 1',