loader failure with old OI pool

gistfile1.txt

see image

jlevon@sent:~$ cat rpool.props 
NAME   PROPERTY                       VALUE                              SOURCE
rpool  size                           119G                               -
rpool  capacity                       83%                                -
rpool  altroot                        -                                  default
rpool  health                         ONLINE                             -
rpool  guid                           17603400736575128424               default
rpool  version                        -                                  default
rpool  bootfs                         rpool/ROOT/openindiana-2019:10:18  local
rpool  delegation                     on                                 default
rpool  autoreplace                    off                                default
rpool  cachefile                      -                                  default
rpool  failmode                       wait                               default
rpool  listsnapshots                  off                                default
rpool  autoexpand                     off                                default
rpool  dedupditto                     0                                  default
rpool  dedupratio                     1.00x                              -
rpool  free                           19.3G                              -
rpool  allocated                      99.7G                              -
rpool  readonly                       off                                -
rpool  comment                        -                                  default
rpool  expandsize                     -                                  -
rpool  freeing                        0                                  default
rpool  fragmentation                  59%                                -
rpool  leaked                         0                                  default
rpool  bootsize                       256M                               local
rpool  checkpoint                     -                                  -
rpool  feature@async_destroy          enabled                            local
rpool  feature@empty_bpobj            active                             local
rpool  feature@lz4_compress           active                             local
rpool  feature@multi_vdev_crash_dump  enabled                            local
rpool  feature@spacemap_histogram     active                             local
rpool  feature@enabled_txg            active                             local
rpool  feature@hole_birth             active                             local
rpool  feature@extensible_dataset     enabled                            local
rpool  feature@embedded_data          active                             local
rpool  feature@bookmarks              enabled                            local
rpool  feature@filesystem_limits      enabled                            local
rpool  feature@large_blocks           enabled                            local
rpool  feature@sha512                 enabled                            local
rpool  feature@skein                  enabled                            local
rpool  feature@edonr                  enabled                            local
rpool  feature@device_removal         enabled                            local
rpool  feature@obsolete_counts        enabled                            local
rpool  feature@zpool_checkpoint       enabled                            local
rpool  feature@spacemap_v2            active                             local

 - never been upgraded

loader-fail.png