The attached java program, when compiled and run with debug -server VM, aborts with a "Meet Not Symmetric" failure.

% bin/java -Xbatch -server Test
=== Meet Not Symmetric ===
t = Interface:TopPTR *,iid=top[int:max..0]
this= Parent:TopPTR *,iid=top[int:1]
mt=(t meet this)= Interface:TopPTR *[int:1]
t_dual= Interface *[int:>=0]
this_dual= Parent *[int:1]
mt_dual= Interface *,iid=top[int:1]
mt_dual meet t_dual= Interface *[int:>=0]
mt_dual meet this_dual= java/lang/Object *[int:1]
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/type.cpp:532
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/BUILD_AREA/jdk7/hotspot/src/share/vm/opto/type.cpp:532), pid=2342, tid=10
# Error: meet not symmetric
#
# JRE version: 7.0-b57
# Java VM: Java HotSpot(TM) Server VM (16.0-b02-fastdebug mixed mode solaris-x86 )