Fix yield* with undefined return method. (#4126)

Fixes #4097.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai daniel.batyai@h-lab.eu

jerry-core/ecma/operations/ecma-iterator-object.c

@@ -386,7 +386,7 @@ ecma_op_iterator_return (ecma_value_t iterator, /**< iterator value */
 
   if (func_return == ECMA_VALUE_UNDEFINED)
   {
-    return ecma_create_iter_result_object (value, true);
+    return ecma_create_iter_result_object (value, ECMA_VALUE_TRUE);
   }
 
   if (!ecma_is_value_object (func_return) || !ecma_op_is_callable (func_return))

tests/jerry/es.next/regression-test-issue-4097.js

@@ -0,0 +1,26 @@
+// 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.
+
+function* g(a) {
+    yield* a;
+    return -3.14;
+}
+
+try {
+  var iter = g("foo" + "bar");
+  new WeakMap(iter);
+  assert(false);
+} catch (e) {
+  assert(e instanceof TypeError);
+}

tests/test262-esnext-excludelist.xml

@@ -6773,7 +6773,6 @@
   <test id="language/expressions/template-literal/invalid-legacy-octal-escape-sequence.js"><reason></reason></test>
   <test id="language/expressions/typeof/proxy.js"><reason></reason></test>
   <test id="language/expressions/yield/star-return-is-null.js"><reason></reason></test>
-  <test id="language/expressions/yield/star-rhs-iter-rtrn-no-rtrn.js"><reason></reason></test>
   <test id="language/expressions/yield/star-throw-is-null.js"><reason></reason></test>
   <test id="language/global-code/decl-lex-configurable-global.js"><reason></reason></test>
   <test id="language/global-code/export.js"><reason></reason></test>