panic: trap type 6, code=10, pc=3c729
Starting stack trace...
panic(ffffffff82825c84) at panic+0x159 sys/kern/subr_prf.c:229
kerntrap(ffff80002db194e0) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
acpi_pdirpa() at acpi_pdirpa+0x2859a
rt_match(ffff8000006c0988,0,1,0) at rt_match+0xc3 rt_clone sys/net/route.c:383 [inline]
rt_match(ffff8000006c0988,0,1,0) at rt_match+0xc3 sys/net/route.c:358
ifa_ifwithroute(fe101c33,ffff8000006c0960,ffff8000006c0988,0) at ifa_ifwithroute+0x10b sys/net/rtsock.c:1245
rtm_getifa(ffff80002db19908,0) at rtm_getifa+0x1ec
rtm_output(ffff8000006c0900,ffff80002db199b0,ffff80002db19908,0,0) at rtm_output+0x586 sys/net/rtsock.c:955
route_output(fffffd80745f2d00,fffffd8069cb3be0) at route_output+0x6bb sys/net/rtsock.c:864
route_send(fffffd8069cb3be0,fffffd80745f2d00,0,0) at route_send+0x8f sys/net/rtsock.c:340
sosend(fffffd8069cb3be0,0,ffff80002db19b68,0,0,0) at sosend+0x663
sendit(ffff80002a62b750,3,ffff80002db19c60,0,ffff80002db19d10) at sendit+0x54c sys/kern/uipc_syscalls.c:786
sys_sendto(ffff80002a62b750,ffff80002db19dc0,ffff80002db19d10) at sys_sendto+0x84 sys/kern/uipc_syscalls.c:564
syscall(ffff80002db19dc0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa63a7f50e50, count: 242
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 d662f6a5-d763-0b53-7cd8-e4e6b0001699
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