Hotspot PIT testing, happened once on Solaris x64

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xffff80f76dd3d2c0, pid=5615, tid=14
#
# JRE version: Java(TM) SE Runtime Environment (9.0) (fastdebug build 9-internal+0-2016-08-12-205858.amurillo.jdk9-hs-2016-08-12-snapshot)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 9-internal+0-2016-08-12-205858.amurillo.jdk9-hs-2016-08-12-snapshot, mixed mode, tiered, g1 gc, solaris-amd64)
# Problematic frame:
# V [libjvm.so+0x1d3d2c0] bool MarkSweep::IsAliveClosure::do_object_b(oop)+0x10
#
# Core dump will be written. Default location: /export/local/aurora/sandbox/results/workDir/gc/survivorAlignment/TestPromotionFromEdenToTenured/core or core.5615
#
# 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.src=/export/local/aurora/CommonData/j2se_jdk/hotspot/test/gc/survivorAlignment -Dtest.src.path=/export/local/aurora/CommonData/j2se_jdk/hotspot/test/gc/survivorAlignment:/export/local/aurora/CommonData/j2se_jdk/hotspot/test/testlibrary:/export/local/aurora/CommonData/j2se_jdk/test/lib -Dtest.classes=/export/local/aurora/sandbox/results/workDir/classes/0/gc/survivorAlignment -Dtest.class.path=/export/local/aurora/sandbox/results/workDir/classes/0/gc/survivorAlignment:/export/local/aurora/sandbox/results/workDir/classes/0/testlibrary:/export/local/aurora/sandbox/results/workDir/classes/0/test/lib -Dtest.vm.opts= -Dtest.tool.vm.opts= -Dtest.compiler.opts= -Dtest.java.opts=-Xmixed -server -XX:MaxRAMFraction=8 -XX:-UseCompressedOops -Dtest.jdk=/export/local/aurora/CommonData/TEST_JAVA_HOME -Dcompile.jdk=/export/local/aurora/CommonData/TEST_JAVA_HOME -Dtest.timeout.factor=16.0 -Dtest.modules=java.base/jdk.internal.misc java.management -Dtest.nativepath=/export/local/aurora/sandbox/JTREG_NATIVEPATH_LIBRARY_PREPARED --add-exports=java.base/jdk.internal.misc=ALL-UNNAMED -Xmixed -XX:MaxRAMFraction=8 -XX:-UseCompressedOops -Djava.library.path=/export/local/aurora/sandbox/JTREG_NATIVEPATH_LIBRARY_PREPARED -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NewSize=64m -XX:MaxNewSize=64m -XX:OldSize=32m -XX:MaxHeapSize=96m -XX:SurvivorRatio=1 -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB -XX:+UnlockExperimentalVMOptions -XX:SurvivorAlignmentInBytes=32 com.sun.javatest.regtest.agent.MainWrapper /export/local/aurora/sandbox/results/workDir/gc/survivorAlignment/TestPromotionFromEdenToTenured.d/main.1.jta 10m 9 TENURED

Host: sca00csn, x86 64 bit 2693 MHz, 4 cores, 15G, Oracle Solaris 11.2 X86
Time: Sun Aug 14 04:35:31 2016 UTC elapsed time: 2 seconds (0d 0h 0m 2s)

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

Current thread (0x0000000000804800): VMThread "VM Thread" [stack: 0xffff80ffbd28f000,0xffff80ffbd38f000] [id=14]

Stack: [0xffff80ffbd28f000,0xffff80ffbd38f000], sp=0xffff80ffbd38def0, free space=1019k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1d3d2c0] bool MarkSweep::IsAliveClosure::do_object_b(oop)+0x10
V [libjvm.so+0x138ca44] bool ClassLoaderDataGraph::do_unloading(BoolObjectClosure*,bool)+0xb4
V [libjvm.so+0x20e320c] bool SystemDictionary::do_unloading(BoolObjectClosure*,bool)+0x1c
V [libjvm.so+0x16cc5cb] void G1MarkSweep::mark_sweep_phase1(bool&,bool)+0x22b
V [libjvm.so+0x16cc2d9] void G1MarkSweep::invoke_at_safepoint(ReferenceProcessor*,bool)+0x209
V [libjvm.so+0x167f71a] bool G1CollectedHeap::do_full_collection(bool,bool)+0x6ea
V [libjvm.so+0x2229bfb] void VM_G1CollectFull::doit()+0x3b
V [libjvm.so+0x2226d9c] void VM_Operation::evaluate()+0x19c
V [libjvm.so+0x222461e] void VMThread::evaluate_operation(VM_Operation*)+0x14e
V [libjvm.so+0x2224c65] void VMThread::loop()+0x465
V [libjvm.so+0x22242d2] void VMThread::run()+0xd2
V [libjvm.so+0x1e819d8] thread_native_entry+0x168
C [libc.so.1+0x1251f1] _thrp_setup+0xa5
C [libc.so.1+0x125490] _lwp_start+0x0