Recently added test stress/gc/TestStressIHOPMultiThread.java failed with 'assert(length() >= survivor_length()) failed: invariant' in 2016-04-11 hs-rt nightly:
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/youngList.hpp:63
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/opt/jprt/T/P1/161432.mikhailo/s/hotspot/src/share/vm/gc/g1/youngList.hpp:63), pid=31405, tid=31426
# assert(length() >= survivor_length()) failed: invariant
#
# JRE version: Java(TM) SE Runtime Environment (9.0) (fastdebug build 9-internal+0-2016-04-11-161432.mikhailo.hs-rt)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 9-internal+0-2016-04-11-161432.mikhailo.hs-rt, mixed mode, tiered, compressed oops, g1 gc, linux-aarch64)
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %P" (or dumping to /export/local/aurora/sandbox/results/workDir/stress/gc/TestStressIHOPMultiThread/core.31405)
#
# An error report file with more information is saved as:
# /export/local/aurora/sandbox/results/workDir/stress/gc/TestStressIHOPMultiThread/hs_err_pid31405.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#


Options: -server -Xmixed -XX:MaxRAMFraction=8

hs_err_pid31405.log is attached.