The VM crashes if started with an AliasLevel < 3. The description of a crash with -XX:AliasLevel=0 is below. -XX:AliasLevel=1 is described in JDK-8078667).


 Java crash when executed with following options on Linux-x64 platform:
java -Xcomp -XX:AliasLevel=0

Here are output for Java 9 b55 product build(hs_err_pid15205.log and replay_pid15205.log files are attached):
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (type.cpp:910), pid=15205, tid=140415838250752
# Error: ShouldNotReachHere()
#
# JRE version: Java(TM) SE Runtime Environment (9.0-b55) (build 1.9.0-ea-b55)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.9.0-ea-b55 compiled mode linux-amd64 compressed oops)
...

Java 8u40 are also affected, but error output seems different(hs_err_pid15219.log and replay_pid15219.log files are attached):
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f1cc3b89a28, pid=15219, tid=139761093342976
#
# JRE version: Java(TM) SE Runtime Environment (8.0_40-b26) (build 1.8.0_40-b26)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.40-b25 compiled mode linux-amd64 compressed oops)
# Problematic frame:
# V [libjvm.so+0x959a28] PhaseIterGVN::add_users_to_worklist(Node*)+0x18
#
...