urlhammer hit assert in GC thread

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (t:/workspace/open/src/hotspot/share/oops/method.cpp:238), pid=20364, tid=20708
#  assert(is_native() && bcp == code_base() || contains(bcp) || VMError::is_error_reported()) failed: bcp doesn't belong to this method: bcp: 0x00000007c0000f70, method: java.lang.Object.<init>()V
#
# JRE version: Java(TM) SE Runtime Environment (10.0) (fastdebug build 10-internal+0-2017-11-18-0331034.vm-sqe-notificationswwgrp.integ-jdk-hs)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 10-internal+0-2017-11-18-0331034.vm-sqe-notificationswwgrp.integ-jdk-hs, compiled mode, tiered, compressed oops, g1 gc, windows-amd64)
# Core dump will be written. Default location: T:\testoutput\jtreg\JTwork\scratch\0\results\client\5\hs_err_pid20364.mdmp
#
# 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: -XX:MaxRAMPercentage=6 -Xcomp -XX:+CreateCoredumpOnCrash -ea -esa -XX:CompileThreshold=100 -XX:+UnlockExperimentalVMOptions -XX:+TieredCompilation -XX:+IgnoreUnrecognizedVMOptions -XX:+DeoptimizeALot -Djava.net.preferIPv6Addresses=false -XX:-PrintVMOptions -XX:+DisplayVMOutputToStderr -XX:+UsePerfData atg.core.net.URLHammer -script C:\ade\mesos\work_dir\jib-master\install\2017-11-18-0331034.vm-sqe-notifications_ww_grp.integ-jdk-hs\src.full\closed\test\hotspot\jtreg\applications\weblogic\urlhammer.script 10 200 -htmlStats stats.html -cookies -substitute -server 127.0.0.1:7001

Host: sca00ljz, Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz, 8 cores, 60G,  Windows Server 2012 R2 , 64 bit Build 9600 (6.3.9600.17415)
Time: Sat Nov 18 06:18:43 2017 Ame elapsed time: 26 seconds (0d 0h 0m 26s)

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

Current thread (0x0000001ab60c8800):  GCTaskThread "GC Thread#1" [stack: 0x0000001ad0610000,0x0000001ad0710000] [id=20708]

Stack: [0x0000001ad0610000,0x0000001ad0710000]
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)