panic: trap type 4, code=0, pc=ffffffff810e7f11
Starting stack trace...
panic(ffffffff8284b032) at panic+0x16f sys/kern/subr_prf.c:229
kerntrap(ffff8000314a3390) at kerntrap+0x1d7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
icmp_mtudisc_timeout(fffffd8064f5d2a8,0) at icmp_mtudisc_timeout+0xc1 sys/netinet/ip_icmp.c:1072
rt_timer_queue_flush(ffffffff82d5f688) at rt_timer_queue_flush+0x1f8 sys/net/route.c:1541
ip_sysctl(ffff8000314a35ac,1,0,ffff8000314a35d8,20000180,4) at ip_sysctl+0x55b sys/netinet/ip_input.c:1659
sys_sysctl(ffff80002a188008,ffff8000314a3710,ffff8000314a3670) at sys_sysctl+0x217 sys/kern/kern_sysctl.c:254
syscall(ffff8000314a3710) at syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline]
syscall(ffff8000314a3710) at syscall+0x53b sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xaca4e0ee2b0, count: 248
End of stack trace.
syncing disks...24 20  done

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 69eb9058-0362-23fd-9d6a-f99e4488aea0
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27f0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.65
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace