VM crashes when MaxVectorSize is set to 0, 1 or 2

[rehn@rehn-ws specjvm2008]$ /home/rehn/source/jdk/vanilla-jdk/build/linux-x86_64-normal-server-fastdebug/jdk/bin/java -XX:MaxVectorSize=2 -version
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fefa61b1be0, pid=24200, tid=24336
#
# JRE version: Java(TM) SE Runtime Environment (12.0) (fastdebug build 12-internal+0-adhoc.rehn.open)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 12-internal+0-adhoc.rehn.open, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x425be0] MachNode::ideal_reg() const+0x20
#
# Core dump will be written. Default location: /home/rehn/tmp/specjvm2008/core.24200.%i.%s.%t
#
# An error report file with more information is saved as:
# /home/rehn/tmp/specjvm2008/hs_err_pid24200.log
#
# Compiler replay data is saved as:
# /home/rehn/tmp/specjvm2008/replay_pid24200.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#
Current thread is 24336
Dumping core ...
Aborted (core dumped)

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm epb ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid xsaveopt dtherm arat pln pts flush_l1d