panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff82fda7dd) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80003c155740) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(b,ffff80003c155908,83,ffff80003c1559a8,0,b) at 0
rt_clone(ffff80003c155a18,ffff80003c155a80,0) at rt_clone+0x98 sys/net/route.c:383
rtalloc(ffff80003c155a80,1,0) at rtalloc+0xb6 rt_match sys/net/route.c:360 [inline]
rtalloc(ffff80003c155a80,1,0) at rtalloc+0xb6 sys/net/route.c:489
ip_multicast_if(ffff80003c155b30,0,ffff80003c155b18) at ip_multicast_if+0x14c sys/netinet/ip_output.c:1364
ip_setmoptions(c,fffffd8055be6a38,fffffd80792f2e00,0) at ip_setmoptions+0x4a1 sys/netinet/ip_output.c:1533
sosetopt(ffff80000170cfc8,0,c,fffffd80792f2e00) at sosetopt+0x117
sys_setsockopt(ffff800032b98f68,ffff80003c155d40,ffff80003c155c90) at sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1231
syscall(ffff80003c155d40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80003c155d40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd15c95e1160, count: 245
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 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 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