VM fails with crash. The failure is in C1.

# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x74736163, pid=3409, tid=2366823312
#
# JRE version: 7.0_04-b08
# Java VM: Java HotSpot(TM) Server VM (23.0-b12-internal-201201260130.bvandett.hotspot-fastdebug compiled mode linux-x86 )
# Problematic frame:
# C 0x74736163

Stack: [0x8d0ad000,0x8d12e000], sp=0x8d12c7dc, free space=509k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C 0x74736163
V [libjvm.so+0x346d3d] assert_equal(IRScopeDebugInfo*, IRScopeDebugInfo*)+0x18d
V [libjvm.so+0x363fa0] LinearScan::assign_reg_num(LIR_OpList*, IntervalWalker*)+0x3a0
V [libjvm.so+0x364327] LinearScan::assign_reg_num()+0xe7
V [libjvm.so+0x3645b0] LinearScan::do_linear_scan()+0x230
V [libjvm.so+0x2ce3d1] Compilation::emit_lir()+0x271
V [libjvm.so+0x2cf981] Compilation::compile_java_method()+0x181
V [libjvm.so+0x2cfb23] Compilation::compile_method()+0x63
V [libjvm.so+0x2cfed4] Compilation::Compilation(AbstractCompiler*, ciEnv*, ciMethod*, int, BufferBlob*)+0x214
V [libjvm.so+0x2d1058] Compiler::compile_method(ciEnv*, ciMethod*, int)+0x108
V [libjvm.so+0x485d6e] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x55e
V [libjvm.so+0x486c4b] CompileBroker::compiler_thread_loop()+0x5bb
V [libjvm.so+0xa9b07f] compiler_thread_entry(JavaThread*, Thread*)+0x4f
V [libjvm.so+0xaa9139] JavaThread::thread_main_inner()+0x1b9
V [libjvm.so+0xaa944e] JavaThread::run()+0x26e
V [libjvm.so+0x929791] java_start(Thread*)+0x111
C [libpthread.so.0+0x5869] abort@@GLIBC_2.0+0x5869


Current CompileTask:
C1: 21927 1762 !b 3 java.lang.ThreadGroup::remove (94 bytes)