rake gettext:compile fails with no implicit conversion of nil into String

Package build on latest master 25d241ae is failing with:

The following shell command exited with status 1:

    $ NODE_ENV=production PATH=/opt/gitlab/embedded/bin:/builds/gitlab/omnibus-gitlab/gems/ruby/2.3.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin RAILS_ENV=production SKIP_STORAGE_VALIDATION=true USE_DB=false /opt/gitlab/embedded/bin/bundle exec rake gettext:compile

Output:

    (nothing)

Error:

    rake aborted!
TypeError: no implicit conversion of nil into String
/var/cache/omnibus/src/gitlab-rails/lib/gitlab/redis/wrapper.rb:37:in `read'
/var/cache/omnibus/src/gitlab-rails/lib/gitlab/redis/wrapper.rb:37:in `_raw_config'
/var/cache/omnibus/src/gitlab-rails/lib/gitlab/redis/wrapper.rb:119:in `fetch_config'
/var/cache/omnibus/src/gitlab-rails/lib/gitlab/redis/wrapper.rb:109:in `raw_config_hash'
/var/cache/omnibus/src/gitlab-rails/lib/gitlab/redis/wrapper.rb:86:in `redis_store_options'
/var/cache/omnibus/src/gitlab-rails/lib/gitlab/redis/wrapper.rb:68:in `params'
/var/cache/omnibus/src/gitlab-rails/lib/gitlab/redis/wrapper.rb:16:in `params'
/var/cache/omnibus/src/gitlab-rails/config/application.rb:148:in `<class:Application>'
/var/cache/omnibus/src/gitlab-rails/config/application.rb:8:in `<module:Gitlab>'
/var/cache/omnibus/src/gitlab-rails/config/application.rb:7:in `<top (required)>'
/var/cache/omnibus/src/gitlab-rails/Rakefile:5:in `require'
/var/cache/omnibus/src/gitlab-rails/Rakefile:5:in `<top (required)>'
/opt/gitlab/embedded/bin/bundle:22:in `load'
/opt/gitlab/embedded/bin/bundle:22:in `<main>'
(See full trace by running task with --trace)

/cc @rdavila @smcgivern