The hs_err head is:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/opt/jprt/T/P1/145625.kwalls/s/src/share/vm/opto/memnode.hpp:1111), pid=31737, tid=140308316575488
# assert((n == empty_memory()) == n->is_top()) failed: sanity
#
# JRE version: Java(TM) SE Runtime Environment (7.0_40-b43) (build 1.7.0_40-fastdebug-b43)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.80-b06-internal-201404031456.kwalls.hotspot-fastdebug mixed mode linux-amd64 compressed oops)
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#

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

Current thread (0x00007f9c682b3000): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=31765, stack(0x00007f9c134e5000,0x00007f9c135e6000)]

Stack: [0x00007f9c134e5000,0x00007f9c135e6000], sp=0x00007f9c135df5c0, free space=1001k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xdd2c82] VMError::report_and_die()+0x302
V [libjvm.so+0x69e2b4] report_vm_error(char const*, int, char const*, char const*)+0x84
V [libjvm.so+0xaf8ba3] MergeMemNode::memory_at(unsigned int) const+0x143
V [libjvm.so+0xb02287] MergeMemNode::Ideal(PhaseGVN*, bool)+0x1b7
V [libjvm.so+0xc10bb5] PhaseIterGVN::transform_old(Node*)+0xa5
V [libjvm.so+0xc0e890] PhaseIterGVN::optimize()+0x2b0
V [libjvm.so+0xaa36eb] PhaseIdealLoop::build_and_optimize(bool, bool)+0x116b
V [libjvm.so+0x61d40a] Compile::Optimize()+0x92a
V [libjvm.so+0x621a7b] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool)+0x172b
V [libjvm.so+0x527170] C2Compiler::compile_method(ciEnv*, ciMethod*, int)+0x250
V [libjvm.so+0x62c6a8] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x548
V [libjvm.so+0x62d974] CompileBroker::compiler_thread_loop()+0x564
V [libjvm.so+0xd6be14] JavaThread::thread_main_inner()+0x194
V [libjvm.so+0xd6c0b9] JavaThread::run()+0x259
V [libjvm.so+0xba7198] java_start(Thread*)+0x108


Current CompileTask:
C2: 704 33 b TestDoubleVect::test_2vi_unaln (32 bytes)