panic: trap type 6, code=10, pc=3c729
Starting stack trace...
panic(ffffffff828277e4) at panic+0x159 sys/kern/subr_prf.c:229
kerntrap(ffff800035c85040) 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(fffffd807b472d30,0,1,0) at rt_match+0xc3 rt_clone sys/net/route.c:383 [inline]
rt_match(fffffd807b472d30,0,1,0) at rt_match+0xc3 sys/net/route.c:358
route_mpath(fffffd807b472d18,fffffd807bde8c24,0,0) at route_mpath+0x8b sys/net/route.c:255
in_pcbselsrc(ffff800035c85428,fffffd807bde8c20,fffffd807b472ca0) at in_pcbselsrc+0x1b7 sys/netinet/in_pcb.c:975
udp_output(fffffd807b472ca0,fffffd807bde8b00,fffffd807bde8c00,0) at udp_output+0x590 sys/netinet/udp_usrreq.c:1018
sosend(fffffd805616a200,fffffd807bde8c00,ffff800035c85588,0,0,0) at sosend+0x663
sendit(ffff80002a678540,4,ffff800035c85710,0,ffff800035c85700) at sendit+0x54c sys/kern/uipc_syscalls.c:786
sys_sendmmsg(ffff80002a678540,ffff800035c858b0,ffff800035c85800) at sys_sendmmsg+0x2ff sys/kern/uipc_syscalls.c:677
syscall(ffff800035c858b0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x104bb1d6ef0, count: 244
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 1498d526-897b-4d0e-28be-a262cd523d51
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