panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff82fd7b5d) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000371e6a70) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(fffffd807a0fff00,fffffd807a0fff00,0,fffffd807a0fff00,2f7,0) at 0
softclock_process_kclock_timeout(fffffd807a0fff00,0) at softclock_process_kclock_timeout+0x2a2 sys/kern/kern_timeout.c:693
softclock(0) at softclock+0x199 sys/kern/kern_timeout.c:746
softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
enqueue_randomness(50500) at enqueue_randomness+0xc5 sys/dev/rnd.c:198
ttyinput(0,ffff80000116ba00) at ttyinput+0x4a sys/kern/tty.c:245
ptcwrite(605,ffff8000371e71f0,1) at ptcwrite+0x308 sys/kern/tty_pty.c:566
spec_write(ffff8000371e6fd0) at spec_write+0x120 sys/kern/spec_vnops.c:302
VOP_WRITE(fffffd806de04948,ffff8000371e71f0,1,fffffd807f7d3340) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245
vn_write(fffffd8077154148,ffff8000371e71f0,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408
dofilewritev(ffff800031383488,6,ffff8000371e71f0,0,ffff8000371e72b0) at dofilewritev+0x23c sys/kern/sys_generic.c:380
sys_writev(ffff800031383488,ffff8000371e7360,ffff8000371e72b0) at sys_writev+0xd8 sys/kern/sys_generic.c:327
syscall(ffff8000371e7360) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371e7360) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfb72dc63830, count: 239
End of stack trace.

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 8f385a59-d101-44dd-592e-0bd3fdfaf750
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 0x000f27c0: 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 3.67
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