Preserve exception message in iterator finalization.

test/message/for-of-throw-in-body.js

Index: test/message/for-of-throw-in-body.js
diff --git a/test/message/regress/regress-4829-1.js b/test/message/for-of-throw-in-body.js
similarity index 81%
copy from test/message/regress/regress-4829-1.js
copy to test/message/for-of-throw-in-body.js
index 1ad5feda8cb96cd24e4c47f7407c9699d150c327..38b27f38632520e292f66b7ab451df00c2c03b68 100644
--- a/test/message/regress/regress-4829-1.js
+++ b/test/message/for-of-throw-in-body.js
@@ -2,6 +2,4 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-function tag() {}
-
-tag(tag`\xyy`);
+for (var x of [1, 2, 3]) { throw 42 }