8069265: ClassCastException when compiled with JDK 9b08+, JDK8 compiles OK. Summary: Alternate fix for 8015499 to eliminate extra checkcast (by working around a limitation in Types#asSuper) without the side effect that results in 8069265 Reviewed-by: mcimadamore, jjg Contributed-by: srikanth.adayapalam@oracle.com

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