D8 Site install fails on undefined indexes

Does this have do with Drupal 8 settings.php settings not allowing for a $db_url ?

db/Provision/Service/db/pdo.php

- has no $creds['pass'] available Undefined index: pass

This seems not to be fatal while it should IMHO

Checking for setters show we use urldecode.

~/.drush/provision$ grep -ri '\->creds =' .
./db/Provision/Service/db.php:    $this->creds = array_map('urldecode', parse_url($this->server->master_db));

platform/drupal/install_8.inc

- has no $db_spec['db_prefix'] = $GLOBALS['db_prefix']; <Undefined index: db_prefix install_8.inc:12x
- now and then error: if ($db_spec['driver'] == 'mysqli') { <Undefined index: driver install_8.inc:12x

Array
(
    [driver] => mysql
    [database] => drupal8dummyclem
    [username] => drupal8dummyclem
    [password] => MD8D54LHGs
    [host] => localhost
    [port] => 3306
    [prefix] => Array
        (
            [default] =>
        )

)

provision_drushrc_site.tpl.php

This file may need changes for Drupal 8

./Provision/Config/Drushrc/provision_drushrc_site.tpl.php

provision_drupal_settings.tpl.php

This file needs changing and/or splitting out into version specific templates.

Run failing task manually

Fill in the correct number for failing task (230 below)

drush @hostmaster hosting-task --force --debug --verbose 230