undefined method `key' for {}:Hash

[profmaad]

On a formerly working gitauth installation, I just tried adding a new user:

git@foobar:~$ gitauth add-user bar-baz /tmp/bar-baz.pub 
/usr/lib/ruby/gems/1.8/gems/gitauth-1.0.3/lib/gitauth/user.rb:144:in `add_key': undefined method `key' for {}:Hash (NoMethodError)
    from /usr/lib/ruby/gems/1.8/gems/gitauth-1.0.3/lib/gitauth/user.rb:127:in `add_key_or_file'
    from /usr/lib/ruby/gems/1.8/gems/gitauth-1.0.3/lib/gitauth/user.rb:136:in `add_key_or_file!'
    from /usr/lib/ruby/gems/1.8/gems/gitauth-1.0.3/lib/gitauth/user.rb:42:in `create'
    from /usr/lib/ruby/gems/1.8/gems/gitauth-1.0.3/bin/gitauth:114:in `apply'
    from /usr/lib/ruby/gems/1.8/gems/perennial-1.2.5/lib/perennial/application.rb:15:in `execute'
    from /usr/lib/ruby/gems/1.8/gems/perennial-1.2.5/lib/perennial/application.rb:170:in `execute_command'
    from /usr/lib/ruby/gems/1.8/gems/perennial-1.2.5/lib/perennial/application.rb:115:in `execute'
    from /usr/lib/ruby/gems/1.8/gems/perennial-1.2.5/lib/perennial/application.rb:153:in `processing'
    from /usr/lib/ruby/gems/1.8/gems/gitauth-1.0.3/bin/gitauth:4
    from /usr/bin/gitauth:19:in `load'
    from /usr/bin/gitauth:19

Some information on my system:
ruby --version: ruby 1.8.7 (2010-08-16 patchlevel 302) [x86_64-linux]

git@foobar:~$ gem list

*** LOCAL GEMS ***

bundler (1.2.1)
daemons (1.1.9, 1.1.4)
eventmachine (1.0.0, 0.12.10)
fcgi (0.8.8)
gitauth (1.0.3)
haml (3.1.7, 3.1.2)
i18n (0.6.1, 0.4.2)
jammit (0.6.5)
open4 (1.3.0)
perennial (1.2.5)
Platform (0.4.0)
POpen4 (0.1.4)
rack (1.4.1, 1.3.2, 1.1.1, 1.0.1)
rack-protection (1.2.0)
rack-test (0.6.2)
rake (10.0.0, 0.8.7)
redgreen (1.2.2)
rr (1.0.4)
sinatra (1.3.3, 1.2.6)
thin (1.5.0, 1.2.11)
thoughtbot-shoulda (2.11.1)
tilt (1.3.3, 1.3.2)
yui-compressor (0.9.6)

This is a Debian 6 system using system ruby.