[modules] Initialize requested_modules before recursing in Module::Instantiate

test/mjsunit/modules-skip-circular-valid.js

Index: test/mjsunit/modules-skip-circular-valid.js
diff --git a/test/message/for-of-throw-in-body.js b/test/mjsunit/modules-skip-circular-valid.js
similarity index 57%
copy from test/message/for-of-throw-in-body.js
copy to test/mjsunit/modules-skip-circular-valid.js
index 38b27f38632520e292f66b7ab451df00c2c03b68..c22544aed0c9a1c182758aff487a95754b8bc4a2 100644
--- a/test/message/for-of-throw-in-body.js
+++ b/test/mjsunit/modules-skip-circular-valid.js
@@ -2,4 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-for (var x of [1, 2, 3]) { throw 42 }
+export let a = {key: 'value'};
+import {b} from "modules-circular-valid.js";
+assertSame(a, b);
+assertEquals('value', a.key);