wordcamp.dev: PHP Warning in_array() expects parameter 2 to be array, null given

[ocean90]

On vagrant provision I get some PHP warnings:

default: Warning: in_array() expects parameter 2 to be array, null given in /srv/www/wordpress-meta-environment/wordcamp.dev/public_html/wp-content/mu-plugins/trusted-deputy-capabilities.php on line 33

Seems to be introduced by https://meta.trac.wordpress.org/changeset/1673/.

[iandunn]

Yup, it just needs something like $trusted_deputies = array() in wp-config.php