strange error from bhyve

[Aryeh Friedman]

When I run the following script bhyveload exits normally but when bhyve
runs I get:

Error return from kevent change: Operation not supported by device

The script:

#!/bin/sh

ifconfig tap6000 destroy
ifconfig tap6000 create
ifconfig tap6000 up
sleep 5
ifconfig bridge0 addm tap6000 up
/usr/sbin/bhyvectl --vm=7598731650023639040instanceID0 --destroy
/usr/sbin/bhyveload -m 1024 -d /vms/dfsdfsf 7598731650023639040instanceID0
/usr/sbin/bhyve -c 0 -m 1024 -AI -H -P -g 0 -s 0:0,hostbridge -s
1:0,virtio-net,tap6000 -s 2:0,virtio-blk,/vms/dfsdfsf -S 31,uart,stdio
7598731650023639040instanceID0&