Invalid regexp patterns should not throw syntax error during parsing (#4038)

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

tests/jerry/es.next/regression-test-issue-2058.js

@@ -12,4 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-/?:/
+try {
+  /?:/
+  assert(false);
+} catch (e) {
+  assert(e instanceof SyntaxError);
+}

tests/jerry/es5.1/regression-test-issue-2058.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("/?:/");
+  assert(false);
+} catch (e) {
+  assert(e instanceof SyntaxError);
+}