On fresh current zvol with org.freebsd:swap=on crashes zfs list (PR:145234)

On fresh freebsd-current automatic swap configuration on zvol with
org.freebsd:swap=on by /etc/rc.d/zvol doesn't work because
zfs list -H -o org.freebsd:swap,name -t volume
fails with bus error.

To repeat a problem try:
# zfs create -V 128m rpool/test
# zfs list rpool/test
NAME USED AVAIL REFER MOUNTPOINT
rpool/test 128M 55.9G 16K -
# zfs set org.freebsd:swap=on rpool/test
# zfs list rpool/test
Segmentation fault (core dumped)
# zfs list
Segmentation fault (core dumped)
# zfs inherit org.freebsd:swap rpool/test
# zfs list rpool/test
NAME USED AVAIL REFER MOUNTPOINT
rpool/test 128M 55.9G 16K -

PR:bin/145234 registered for this problem.

-- 
MATPOCKuH