rake -I . themes
Auth Engine: Simple
$ rake -I . themes

rake aborted!
Mustermann::CompileError: regular expression should not contain ^: "^\\/.search"
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/regular.rb:40:in `check_anchors'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/regular.rb:31:in `compile'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/regexp_based.rb:19:in `initialize'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/regular.rb:25:in `initialize'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/pattern.rb:59:in `new'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/pattern.rb:59:in `block in new'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/equality_map.rb:39:in `fetch'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann/pattern.rb:59:in `new'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/mustermann-1.0.0/lib/mustermann.rb:67:in `new'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/sinatra-2.0.0/lib/sinatra/base.rb:1638:in `compile'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/sinatra-2.0.0/lib/sinatra/base.rb:1626:in `compile!'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/sinatra-2.0.0/lib/sinatra/base.rb:1601:in `route'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/sinatra-2.0.0/lib/sinatra/base.rb:1390:in `post'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/sinatra-2.0.0/lib/sinatra/base.rb:1923:in `block (2 levels) in delegate'
/media/data/software/blorgit/blorgit/blorgit.rb:45:in `<top (required)>'
/media/data/software/blorgit/blorgit/Rakefile:1:in `<top (required)>'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/bin/ruby_executable_hooks:15:in `eval'
/home/thibault/.rvm/gems/ruby-2.3.3@blorgit/bin/ruby_executable_hooks:15:in `<main>'
(See full trace by running task with --trace)