Running Java 9(build 1.9.0-ea-b48) on Linux-x64 with following options cause Java to print crash report:
java -XX:+UnlockDiagnosticVMOptions -XX:-UnrollLimitCheck

Got following output:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f8d7f0525be, pid=23628, tid=140245277476608
#
# JRE version: Java(TM) SE Runtime Environment (9.0-b48) (build 1.9.0-ea-b48)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.9.0-ea-b48 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# V [libjvm.so+0x78b5be] PhaseIdealLoop::build_loop_late_post(Node*)+0x13e
#
# Core dump written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c" (or dumping to /home/dmitry/bundles/jdk9/b48/bin/core.23628)
#
# An error report file with more information is saved as:
# /home/dmitry/bundles/jdk9/b48/bin/hs_err_pid23628.log
......


java -version:
java version "1.9.0-ea"
Java(TM) SE Runtime Environment (build 1.9.0-ea-b48)
Java HotSpot(TM) 64-Bit Server VM (build 1.9.0-ea-b48, mixed mode)