JDK-8154122 introduce new flag "UseFMA". Running following sequence of commands cause fastdebug Java 9(b140 and later) to crash on my Linux amd64 system:
java -Xshare:dump
java -XX:-UseFMA -XX:+UseSharedSpaces -version
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/method.cpp:982
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/scratch/opt/jprt/T/P1/002850.jianzhou/s/hotspot/src/share/vm/oops/method.cpp:982), pid=16543, tid=16545
# assert(entry == _i2i_entry && entry == _from_interpreted_entry) failed: should be correctly set during dump time
#
# JRE version: (9.0) (fastdebug build )
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 9-internal+0-2016-11-15-002850.jianzhou.jdk9, mixed mode, sharing, tiered, compressed oops, g1 gc, linux-amd64)
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %P" (or dumping to /home/ddmitriev/work/nightly_bundles/nightly.2016-11.15/bin/core.16543)
#
# An error report file with more information is saved as:
# /home/ddmitriev/work/nightly_bundles/nightly.2016-11.15/bin/hs_err_pid16543.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#

hs_err_pid16543.log is attached.