From 5cd828a3d253ce0b7c1f10e105f2912b2c6f6279 Mon Sep 17 00:00:00 2001
From: Toru Nagashima <public@mysticatea.dev>
Date: Tue, 4 Aug 2020 18:58:59 +0900
Subject: [PATCH] LegacyNonOctalEscapeSequence is syntax error in strict mode

---
 acorn/src/tokenize.js | 6 ++++++
 bin/test262.whitelist | 2 --
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/acorn/src/tokenize.js b/acorn/src/tokenize.js
index 6c86f5c51..f5b6ec899 100644
--- a/acorn/src/tokenize.js
+++ b/acorn/src/tokenize.js
@@ -694,6 +694,12 @@ pp.readEscapedChar = function(inTemplate) {
     return ""
   case 56:
   case 57:
+    if (this.strict) {
+      this.invalidStringToken(
+        this.pos - 1,
+        "Invalid escape sequence"
+      )
+    }
     if (inTemplate) {
       const codePos = this.pos - 1
 
diff --git a/bin/test262.whitelist b/bin/test262.whitelist
index 09eb5e874..387807a9e 100644
--- a/bin/test262.whitelist
+++ b/bin/test262.whitelist
@@ -1,5 +1,3 @@
-language/literals/string/legacy-non-octal-escape-sequence-8-strict.js (strict mode)
-
 language/expressions/await/await-BindingIdentifier-in-global.js (default)
 language/expressions/await/await-BindingIdentifier-in-global.js (strict mode)
 language/expressions/await/await-in-global.js (default)