The attached test crashes JVM on x86 platforms (amd64 and SPARC are unaffected) from version
1.5 to the latest builds of 1.6.
How to reproduce:
java -server -Xcomp Tester_143

#
# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (/BUILD_AREA/jdk6.0/hotspot/src/cpu/i486/vm/assembler_i486.cpp, 404), pid=6860, tid=2825382832
#
# Java VM: Java HotSpot(TM) Server VM (1.6.0-rc-fastdebug-b60-debug compiled mode)
#
# Error: ShouldNotReachHere()
# 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 (0xa8702000): JavaThread "CompilerThread1" daemon [_thread_in_vm, id=6868]

Stack: [0xa85fe000,0xa867f000), sp=0xa867d630, free space=509k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x8c5e38]
V [libjvm.so+0x3f0476]
V [libjvm.so+0x2bfdd1]
V [libjvm.so+0x7e8ff5]
V [libjvm.so+0x381415]
V [libjvm.so+0x380f7b]
V [libjvm.so+0x7451a5]
V [libjvm.so+0x727080]
V [libjvm.so+0x725fc8]
V [libjvm.so+0x3256d0]
V [libjvm.so+0x39f3ea]
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:302 b Tester_143_Class_4.func_4(C)B (97 bytes)
/* bogus description removed */