C2 compiler crashes in PhaseIdealLoop::build_loop_late_post
This is reproducible easily and quickly after customer application launches.

V [libjvm.so+0x6ea4d8] [0x6e988c]'void PhaseIdealLoop::build_loop_late_post(Node*)'+0xc4c
V [libjvm.so+0x6e9838] [0x6e95c4]'void PhaseIdealLoop::build_loop_late(VectorSet&,Node_List&,Node_Stack&)'+0x274
V [libjvm.so+0x6e785c] [0x6e7098]'void PhaseIdealLoop::build_and_optimize(bool,bool)'+0x7c4
V [libjvm.so+0x1d93f4] [0x1d907c]'void Compile::Optimize()'+0x378
V [libjvm.so+0x428b5c] [0x427db8]'Compile::Compile(ciEnv*,C2Compiler*,ciMethod*,int,bool,bool)'+0xda4
V [libjvm.so+0x1d3cf4] [0x1d3c4c]'void C2Compiler::compile_method(ciEnv*,ciMethod*,int)'+0xa8
V [libjvm.so+0x1d4bd8] [0x1d417c]'void CompileBroker::invoke_compiler_on_method(CompileTask*)'+0xa5c
V [libjvm.so+0x247e34] [0x2475d4]'void CompileBroker::compiler_thread_loop()'+0x860
V [libjvm.so+0x858590] [0x858540]'void JavaThread::thread_main_inner()'+0x50
V [libjvm.so+0x77d890] [0x77d738]'java_start'+0x158

for details see the attached error log and corefile