The attached program crashes JVMs from version 1.5 to the latest builds of 1.6.
How to reproduce: java -server -Xcomp Tester_816

# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (/BUILD_AREA/jdk6.0/hotspot/src/share/vm/opto/phaseX.cpp, 1343), pid=6932, tid=2825382832
#
# Java VM: Java HotSpot(TM) Server VM (1.6.0-rc-fastdebug-b60-debug compiled mode)
#
# Error: assert(new_input == clone->in(i),"insanity check")
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x0811ae00): JavaThread "CompilerThread1" daemon [_thread_in_native, id=6940]

Stack: [0xa85fe000,0xa867f000), sp=0xa867d090, free space=508k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x8c5e38]
V [libjvm.so+0x3f01d5]
V [libjvm.so+0x7a27a1]
V [libjvm.so+0x7a254c]
V [libjvm.so+0x3a2f88]
V [libjvm.so+0x39f22e]
V [libjvm.so+0x2fb1f6]
V [libjvm.so+0x3abc1c]
V [libjvm.so+0x3ab207]
V [libjvm.so+0x86e9ac]
V [libjvm.so+0x74dd72]
C [libpthread.so.0+0x528c]


Current CompileTask:
opto:293 b Tester_816_Class_2.<init>()V (187 bytes)