panic: trap type 4, code=0, pc=ffffffff828035df
Starting stack trace...
panic(ffffffff82828299) at panic+0x159 sys/kern/subr_prf.c:229
kerntrap(ffff80002db42e80) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ktrops(ffff80002a6759c0,deafbeaddeafbead,0,80000d30,fffffd80696757b8,fffffd807f7d7820) at ktrops+0x4f ktrcanset sys/kern/kern_ktrace.c:718 [inline]
ktrops(ffff80002a6759c0,deafbeaddeafbead,0,80000d30,fffffd80696757b8,fffffd807f7d7820) at ktrops+0x4f sys/kern/kern_ktrace.c:561
doktrace(fffffd80696757b8,4,d30,0,ffff80002a6759c0) at doktrace+0x514 ktrsetchildren sys/kern/kern_ktrace.c:586 [inline]
doktrace(fffffd80696757b8,4,d30,0,ffff80002a6759c0) at doktrace+0x514 sys/kern/kern_ktrace.c:508
sys_ktrace(ffff80002a6759c0,ffff80002db43290,ffff80002db431e0) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:549
syscall(ffff80002db43290) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x847132c2ab0, count: 249
End of stack trace.
syncing disks...16 9  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 e4c28bce-9379-8bb2-f2c8-a7cf484f58e0
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 $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