From 8eda9bc1c3683d1e498d0ed0dba38246c1c11c80 Mon Sep 17 00:00:00 2001
From: Robert Fancsik <frobert@inf.u-szeged.hu>
Date: Thu, 14 Nov 2019 14:46:01 +0100
Subject: [PATCH] Fix the usage of escaped identifiers in
 scanner_scope_find_let_declaration (#3317)

This patch fixes #3313.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
---
 jerry-core/parser/js/js-scanner-util.c    |  2 ++
 tests/jerry/regression-test-issue-3313.js | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 tests/jerry/regression-test-issue-3313.js

diff --git a/jerry-core/parser/js/js-scanner-util.c b/jerry-core/parser/js/js-scanner-util.c
index ad36e1b23..ca31ccf15 100644
--- a/jerry-core/parser/js/js-scanner-util.c
+++ b/jerry-core/parser/js/js-scanner-util.c
@@ -1010,6 +1010,8 @@ scanner_scope_find_let_declaration (parser_context_t *context_p, /**< context */
   {
     uint8_t *destination_p = (uint8_t *) scanner_malloc (context_p, literal_p->length);
 
+    lexer_convert_ident_to_utf8 (literal_p->char_p, destination_p, literal_p->length);
+
     name_p = ecma_new_ecma_string_from_utf8 (destination_p, literal_p->length);
     scanner_free (destination_p, literal_p->length);
   }
diff --git a/tests/jerry/regression-test-issue-3313.js b/tests/jerry/regression-test-issue-3313.js
new file mode 100644
index 000000000..dfb0fb294
--- /dev/null
+++ b/tests/jerry/regression-test-issue-3313.js
@@ -0,0 +1,20 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+try {
+  eval("var" + "\u2029" + 'g\\u0065t: break get' );
+  assert (false);
+} catch (e) {
+  assert (e instanceof SyntaxError);
+}