Fix the private field crash for the Array object. (#5139)

Fixes 5097, 5100, 5138

Additional regression test cases added by: Robert Sipka <robert.sipka@h-lab.eu>

JerryScript-DCO-1.0-Signed-off-by: Baihe Jiang <baihe.jiang@outlook.com>
JerryScript-DCO-1.0-Signed-off-by: Lily Jiang bhjiang.whu@hotmail.com

tests/jerry/private_fields.js

@@ -327,3 +327,26 @@ class O {
 var var16 = new O();
 var16.b();
 assert(var16.c() == 12);
+
+// Private fields are accessible in Array object
+class P extends Array {
+  #a = 1;
+  b() {
+    return this.#a;
+  }
+}
+
+var var17 = new P();
+assert(var17.b() == 1);
+
+class Q extends Array {
+  #a() {
+    return 1;
+  }
+  b() {
+    return this.#a();
+  }
+}
+
+var var18 = new Q();
+assert(var18.b() == 1);

tests/jerry/regression-test-issue-5097.js

@@ -0,0 +1,19 @@
+// 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.
+
+class Foo extends ([]).constructor {
+    #g;
+}
+
+new Foo();

tests/jerry/regression-test-issue-5100.js

@@ -0,0 +1,21 @@
+// 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.
+
+class Foo extends Array {
+    #x() {
+    }
+}
+
+var bar = new Foo();
+bar[0] = 1;

tests/jerry/regression-test-issue-5138.js

@@ -0,0 +1,19 @@
+// 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.
+
+class C1 extends Array{
+    #test() {
+    }
+}
+new C1()