From 83c44d20b31f11e8587a6f41f024c8385607da43 Mon Sep 17 00:00:00 2001
From: Robert Fancsik <frobert@inf.u-szeged.hu>
Date: Mon, 16 Sep 2019 02:26:08 -0700
Subject: [PATCH] Fix skipping empty statements during class literal scanning
 (#3124)

This patch fixes #3123

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
---
 jerry-core/parser/js/js-scanner.c             |  6 +-----
 .../es2015/regression-test-issue-3123.js      | 20 +++++++++++++++++++
 2 files changed, 21 insertions(+), 5 deletions(-)
 create mode 100644 tests/jerry/es2015/regression-test-issue-3123.js

diff --git a/jerry-core/parser/js/js-scanner.c b/jerry-core/parser/js/js-scanner.c
index 3937a24ac..be91a0343 100644
--- a/jerry-core/parser/js/js-scanner.c
+++ b/jerry-core/parser/js/js-scanner.c
@@ -1414,13 +1414,9 @@ scanner_scan_all (parser_context_t *context_p) /**< context */
         {
           JERRY_ASSERT (stack_top == SCAN_STACK_CLASS_STATEMENT || stack_top == SCAN_STACK_CLASS_EXPRESSION);
 
+          lexer_skip_empty_statements (context_p);
           lexer_scan_identifier (context_p, LEXER_SCAN_CLASS_PROPERTY);
 
-          if (context_p->token.type == LEXER_SEMICOLON)
-          {
-            break;
-          }
-
           if (context_p->token.type == LEXER_RIGHT_BRACE)
           {
             scanner_context.mode = (stack_top == SCAN_STACK_CLASS_EXPRESSION ? SCAN_MODE_PRIMARY_EXPRESSION_END
diff --git a/tests/jerry/es2015/regression-test-issue-3123.js b/tests/jerry/es2015/regression-test-issue-3123.js
new file mode 100644
index 000000000..d26b73815
--- /dev/null
+++ b/tests/jerry/es2015/regression-test-issue-3123.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.
+
+switch ($) {
+  case $: class $ {;}
+  case $$: class $$ {; ; ; ; ;;;; ;}
+  case 6:
+}
+