The hs_err head is:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/HUDSON/sca00cmk/workspace/7u-2-build-solaris-amd64/jdk7u-cpu/2588/hotspot/src/share/vm/opto/coalesce.cpp:147), pid=3290, tid=15
# assert(_cfg._bbs[proj->_idx] == borig) failed: incorrect block for kill projections
#
# JRE version: Java(TM) SE Runtime Environment (7.0_91-b08) (build 1.7.0_91-fastdebug-langtools-nightly-h2588-20150728-b08-b08)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.95-b01-fastdebug mixed mode solaris-amd64 compressed oops)
# Core dump written. Default location: /export/local/aurora/sandbox/results/ResultDir/jck60025/core or core.3290
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#

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

Current thread (0x000000000889d800): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=15, stack(0xffff80ffbc0fd000,0xffff80ffbc1fd000)]

Stack: [0xffff80ffbc0fd000,0xffff80ffbc1fd000], sp=0xffff80ffbc1f5780, free space=993k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x2df5e38] void VMError::report(outputStream*)+0x8f4
V [libjvm.so+0x2df718f] void VMError::report_and_die()+0x57f
V [libjvm.so+0x1172ef3] void report_vm_error(const char*,int,const char*,const char*)+0x55f
V [libjvm.so+0xed1a44] int PhaseChaitin::clone_projs(Block*,unsigned,Node*,Node*,unsigned&)+0x7a8
V [libjvm.so+0x29ac64c] Node*PhaseChaitin::split_Rematerialize(Node*,Block*,unsigned,unsigned&,GrowableArray<unsigned>,int,unsigned*,Node**,bool)+0x14b8
V [libjvm.so+0x29b3869] unsigned PhaseChaitin::Split(unsigned,ResourceArea*)+0x63a1
V [libjvm.so+0xd5072f] void PhaseChaitin::Register_Allocate()+0x843
V [libjvm.so+0xf93aa4] void Compile::Code_Gen()+0x64c
V [libjvm.so+0xf85ab5] Compile::Compile(ciEnv*,C2Compiler*,ciMethod*,int,bool,bool)+0x1779
V [libjvm.so+0xce1616] void C2Compiler::compile_method(ciEnv*,ciMethod*,int)+0x17e
V [libjvm.so+0xfbbd0c] void CompileBroker::invoke_compiler_on_method(CompileTask*)+0x17d8
V [libjvm.so+0xfb963b] void CompileBroker::compiler_thread_loop()+0xea3
V [libjvm.so+0x2c4d1a3] void JavaThread::thread_main_inner()+0x507
V [libjvm.so+0x2c4c8e5] void JavaThread::run()+0x83d
V [libjvm.so+0x27586c6] java_start+0x1ce
C [libc.so.1+0x1251f1] _thrp_setup+0xa5
C [libc.so.1+0x125490] _lwp_start+0x0


Current CompileTask:
C2: 280691 1526 ! java.io.FilePermission$1::run (116 bytes)