Test gc/epsilon/TestByteArrays.java failed once with
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/scratch/mesos/slaves/c4ee7e63-1ded-4e8c-9581-ce26f27e3af4-S221804/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/364a1876-bddd-4bdf-bdbd-90c7336af8b8/runs/70ff7542-45f7-4bab-9f55-5f15520a5b60/workspace/open/src/hotspot/share/opto/machnode.cpp:580), pid=94736, tid=18435
# assert((uint)_ideal_reg < (uint)_last_machine_leaf && Type::mreg2type[_ideal_reg]) failed: in bounds
#
# JRE version: Java(TM) SE Runtime Environment (11.0+20) (fastdebug build 11-ea+20)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 11-ea+20, compiled mode, compressed oops, epsilon gc, bsd-amd64)
# No core dump will be written. 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.java.com/bugreport/crash.jsp
#

--------------- S U M M A R Y ------------

Command Line: -Dtest.class.path.prefix=/scratch/mesos/slaves/c4ee7e63-1ded-4e8c-9581-ce26f27e3af4-S256948/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/6aab9364-8132-4655-b933-627a68f35a10/runs/09f19835-4897-442b-a19d-f40740c43c0c/testoutput/jtreg/JTwork/classes/0/gc/epsilon/TestByteArrays.d:/scratch/mesos/jib-master/install/jdk/11/20/src.full/open/test/hotspot/jtreg/gc/epsilon -Dtest.src=/scratch/mesos/jib-master/install/jdk/11/20/src.full/open/test/hotspot/jtreg/gc/epsilon -Dtest.src.path=/scratch/mesos/jib-master/install/jdk/11/20/src.full/open/test/hotspot/jtreg/gc/epsilon -Dtest.classes=/scratch/mesos/slaves/c4ee7e63-1ded-4e8c-9581-ce26f27e3af4-S256948/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/6aab9364-8132-4655-b933-627a68f35a10/runs/09f19835-4897-442b-a19d-f40740c43c0c/testoutput/jtreg/JTwork/classes/0/gc/epsilon/TestByteArrays.d -Dtest.class.path=/scratch/mesos/slaves/c4ee7e63-1ded-4e8c-9581-ce26f27e3af4-S256948/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/6aab9364-8132-4655-b933-627a68f35a10/runs/09f19835-4897-442b-a19d-f40740c43c0c/testoutput/jtreg/JTwork/classes/0/gc/epsilon/TestByteArrays.d -Dtest.vm.opts=-XX:MaxRAMPercentage=12 -Dtest.tool.vm.opts=-J-XX:MaxRAMPercentage=12 -Dtest.compiler.opts= -Dtest.java.opts= -Dtest.jdk=/scratch/mesos/jib-master/install/jdk/11/20/macosx-x64-debug.jdk/jdk-11/fastdebug -Dcompile.jdk=/scratch/mesos/jib-master/install/jdk/11/20/macosx-x64-debug.jdk/jdk-11/fastdebug -Dtest.timeout.factor=10.0 -Dtest.nativepath=/scratch/mesos/jib-master/install/jdk/11/20/macosx-x64-debug.test/hotspot/jtreg/native -XX:MaxRAMPercentage=12 -Djava.library.path=/scratch/mesos/jib-master/install/jdk/11/20/macosx-x64-debug.test/hotspot/jtreg/native -Xmx1g -Xbatch -Xcomp -XX:-TieredCompilation -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC com.sun.javatest.regtest.agent.MainWrapper /scratch/mesos/slaves/c4ee7e63-1ded-4e8c-9581-ce26f27e3af4-S256948/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/6aab9364-8132-4655-b933-627a68f35a10/runs/09f19835-4897-442b-a19d-f40740c43c0c/testoutput/jtreg/JTwork/gc/epsilon/TestByteArrays.d/main.4.jta

Host: scaaa906.us.oracle.com, Macmini6,1 x86_64 2500 MHz, 4 cores, 16G, Darwin 17.5.0
Time: Sun Jul 1 06:36:28 2018 GMT elapsed time: 12 seconds (0d 0h 0m 12s)

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

Current thread (0x00007fe141812000): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=18435, stack(0x000070000ac62000,0x000070000ad62000)]


Current CompileTask:
C2: 12288 1690 !b java.util.zip.ZipFile$Source::get (152 bytes)

Stack: [0x000070000ac62000,0x000070000ad62000], sp=0x000070000ad5de20, free space=1007k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.dylib+0xc39c81] VMError::report_and_die(int, char const*, char const*, __va_list_tag*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x609
V [libjvm.dylib+0xc3a339] VMError::report_and_die(Thread*, void*, char const*, int, char const*, char const*, __va_list_tag*)+0x47
V [libjvm.dylib+0x459f17] report_vm_error(char const*, int, char const*, char const*, ...)+0xcc
V [libjvm.dylib+0x8fa0cc] MachProjNode::bottom_type() const+0xf0
V [libjvm.dylib+0x3108a5] PhaseChaitin::gather_lrg_masks(bool)+0x181
V [libjvm.dylib+0x3101b9] PhaseChaitin::Register_Allocate()+0x70b
V [libjvm.dylib+0x3cc800] Compile::Code_Gen()+0x1b8
V [libjvm.dylib+0x3c9d9b] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0xc7d
V [libjvm.dylib+0x2eb4ed] C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0xed
V [libjvm.dylib+0x3dd6a0] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x5b8
V [libjvm.dylib+0x3dcf9c] CompileBroker::compiler_thread_loop()+0x20c
V [libjvm.dylib+0xbb0ec4] JavaThread::thread_main_inner()+0x1fe
V [libjvm.dylib+0xbb099f] JavaThread::run()+0x313
V [libjvm.dylib+0xa23560] thread_native_entry(Thread*)+0x145
C [libsystem_pthread.dylib+0x3661] _pthread_body+0x154
C [libsystem_pthread.dylib+0x350d] _pthread_body+0x0
C [libsystem_pthread.dylib+0x2bf9] thread_start+0xd