panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff82fdfb15) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000371d6fa0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(fffffd807cba2ce0,fffffd807cba2ce0,0,fffffd807cba2ce0,3ac,0) at 0

softclock_process_kclock_timeout(fffffd807cba2ce0,0) 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
ttread(ffff800000b4d800,ffff8000371d75e0,0) at ttread+0x861 sys/kern/tty.c:1591
spec_read(ffff8000371d73d0) at spec_read+0x155 sys/kern/spec_vnops.c:215
VOP_READ(fffffd805fd37a20,ffff8000371d75e0,0,fffffd807f7d36e8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227
vn_read(fffffd806f7d38e8,ffff8000371d75e0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369
dofilereadv(ffff8000357a3208,3,ffff8000371d75e0,0,ffff8000371d76a0) at dofilereadv+0x230 sys/kern/sys_generic.c:252
sys_readv(ffff8000357a3208,ffff8000371d7750,ffff8000371d76a0) at sys_readv+0xd8 sys/kern/sys_generic.c:199
syscall(ffff8000371d7750) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371d7750) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xff5cfcf6a00, count: 241
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 50375c3b-e826-8a7e-06ca-b163c863336b
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