Fix the order of value finalizing in ecma_builtin_typedarray_prototype_join (#2726)

This patch fixes #2724.

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

tests/jerry/es2015/regression-test-issue-2724.js

@@ -0,0 +1,22 @@
+// 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 {
+  var obj = { reverse : Int32Array.prototype.join } ;
+  Object.defineProperty( obj, 'length', { 'get' : function(toPrecision) { return Object.create(/x/); }});
+  obj.reverse("$01$02$11$20");
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}