✝ multi-vlad ✝ /var/www/site/vlad_aux/d6d8-dev $ drush8 mi upgrade_d6_field_instance --limit=1
Drupal\migrate\Row Object
(
    [source:protected] => Array
        (
            [field_name] => field_article_types
            [type_name] => article
            [weight] => 31
            [label] => Types
            [widget_type] => optionwidgets_select
            [widget_settings] => Array
                (
                    [default_value] => Array
                        (
                            [0] => Array
                                (
                                    [value] =>
                                )

                        )

                    [default_value_php] =>
                )

            [display_settings] => Array
                (
                    [label] => Array
                        (
                            [format] => above
                            [exclude] => 0
                        )

                    [teaser] => Array
                        (
                            [format] => default
                            [exclude] => 0
                        )

                    [full] => Array
                        (
                            [format] => default
                            [exclude] => 0
                        )

                    [4] => Array
                        (
                            [format] => default
                            [exclude] => 0
                        )

                )

            [description] =>
            [widget_module] => optionwidgets
            [widget_active] => 1
            [type] => text
            [global_settings] => Array
                (
                    [text_processing] => 0
                    [max_length] =>
                    [allowed_values] => category_a|Category A
category_b|Category B
category_c|Category C
                    [allowed_values_php] =>
                )

            [required] => 0
            [multiple] => 0
            [db_storage] => 1
            [module] => text
            [db_columns] => a:1:{s:5:"value";a:5:{s:4:"type";s:4:"text";s:4:"size";s:3:"big";s:8:"not null";b:0;s:8:"sortable";b:1;s:5:"views";b:1;}}
            [active] => 1
            [locked] => 0
            [migrate_map_sourceid1] =>
            [migrate_map_sourceid2] =>
            [migrate_map_source_row_status] =>
            [key] => drupal_6
            [database] => Array
                (
                    [driver] => mysql
                    [username] => vlad
                    [password] => wibble
                    [host] => localhost
                    [port] =>
                    [database] => d6db
                    [prefix] =>
                )

            [plugin] => d6_field_instance
            [constants] => Array
                (
                    [entity_type] => node
                )

        )

    [sourceIds:protected] => Array
        (
            [field_name] => Array
                (
                    [type] => string
                    [alias] => cnfi
                )

            [type_name] => Array
                (
                    [type] => string
                )

        )

    [destination:protected] => Array
        (
        )

    [idMap:protected] => Array
        (
            [original_hash] =>
            [hash] =>
            [source_row_status] => 1
        )

    [frozen:protected] =>
    [rawDestination:protected] => Array
        (
        )

    [isStub:protected] =>
)

Processed 1 item (0 created, 0 updated, 1 failed, 0 ignored) - done with 'upgrade_d6_field_instance'                                [status]
✝ multi-vlad ✝ /var/www/site/vlad_aux/d6d8-dev $ drush8 mmsg upgrade_d6_field_instance
 source_ids_hash                                                   level   message
 32579df3f118e54f51a88b991e5df96bca25b4804320c5e015ee3f771383e9e9  1       Input should be an array.
✝ multi-vlad ✝ /var/www/site/vlad_aux/d6d8-dev $