A DESCRIPTION OF THE PROBLEM :
# Internal Error (loopnode.hpp:622), pid=25278, tid=0x00007fe9d5e1d700
# guarantee(n != NULL) failed: No Node.
#
# JRE version: Java(TM) SE Runtime Environment (8.0_191-b12) (build 1.8.0_191-b12)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.191-b12 mixed mode linux-amd64 compressed oops)
# Core dump written. Default location: /home/appops/pop-shoperp-system/pop-shoperp-system-onlinejd/default/tomcat/core or core.25278
#
# 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 (0x00007fe9d0001000): JavaThread "C2 CompilerThread1" daemon [_thread_in_native, id=25293, stack(0x00007fe9d5d1d000,0x00007fe9d5e1e000)]

Stack: [0x00007fe9d5d1d000,0x00007fe9d5e1e000], sp=0x00007fe9d5e18ad0, free space=1006k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xace425] VMError::report_and_die()+0x2c5
V [libjvm.so+0x4dea88] report_vm_error(char const*, int, char const*, char const*)+0x58
V [libjvm.so+0x7f5497] IdealLoopTree::beautify_loops(PhaseIdealLoop*)+0x357
V [libjvm.so+0x7f55bd] IdealLoopTree::beautify_loops(PhaseIdealLoop*)+0x47d
V [libjvm.so+0x7f55bd] IdealLoopTree::beautify_loops(PhaseIdealLoop*)+0x47d
V [libjvm.so+0x7f55bd] IdealLoopTree::beautify_loops(PhaseIdealLoop*)+0x47d
V [libjvm.so+0x7f55bd] IdealLoopTree::beautify_loops(PhaseIdealLoop*)+0x47d
V [libjvm.so+0x7f55d5] IdealLoopTree::beautify_loops(PhaseIdealLoop*)+0x495
V [libjvm.so+0x7f55bd] IdealLoopTree::beautify_loops(PhaseIdealLoop*)+0x47d
V [libjvm.so+0x7fc501] PhaseIdealLoop::build_and_optimize(bool, bool)+0x521
V [libjvm.so+0x47d9bf] Compile::Optimize()+0x45f
V [libjvm.so+0x47f73a] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool)+0xcda
V [libjvm.so+0x3c461a] C2Compiler::compile_method(ciEnv*, ciMethod*, int)+0xaa
V [libjvm.so+0x48ad7c] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x73c
V [libjvm.so+0x48c998] CompileBroker::compiler_thread_loop()+0x6d8
V [libjvm.so+0xa76f9b] JavaThread::thread_main_inner()+0xdb
V [libjvm.so+0xa7722f] JavaThread::run()+0x25f
V [libjvm.so+0x909c92] java_start(Thread*)+0x102
C [libpthread.so.0+0x6b50] start_thread+0xd0


Current CompileTask:
C2:434021418 50872 % ! 4

FREQUENCY : rarely