undefined method `to_ber' for nil:NilClass

[cforce]

We get following error message when running rake task:
rake redmine:plugins:redmine_ldap_sync:sync_users RAILS_ENV=p roduction --trace
(in /usr/local/lib/redmine-1.2.1)
** Invoke redmine:plugins:redmine_ldap_sync:sync_users (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute redmine:plugins:redmine_ldap_sync:sync_users
rake aborted!
undefined method to_ber' for nil:NilClass /usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap/fil ter.rb:206:into_ber'
/usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap/fil ter.rb:214:in to_ber' /usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap/fil ter.rb:214:inmap'
/usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap/fil ter.rb:214:in to_ber' /usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap.rb: 1154:insearch'
/usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap.rb: 1144:in loop' /usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap.rb: 1144:insearch'
/usr/local/lib/redmine-1.2.1/vendor/plugins/ruby-net-ldap-0.0.4/lib/net/ldap.rb: 640:in search' /usr/local/lib/redmine-1.2.1/app/models/auth_source_ldap.rb:109:inget_user_dn'
/usr/local/lib/redmine-1.2.1/vendor/plugins/redmine_ldap_sync/lib/redmine_ldap_s ync/redmine_ext/auth_source_ldap_patch.rb:50:in sync_users' /usr/local/lib/redmine-1.2.1/vendor/rails/activerecord/lib/active_record/base.rb :1971:infind_or_create_by_login'
/usr/local/lib/redmine-1.2.1/vendor/plugins/redmine_ldap_sync/lib/redmine_ldap_s ync/redmine_ext/auth_source_ldap_patch.rb:49:in sync_users' /usr/local/lib/redmine-1.2.1/vendor/plugins/redmine_ldap_sync/lib/redmine_ldap_s ync/redmine_ext/auth_source_ldap_patch.rb:46:ineach'
/usr/local/lib/redmine-1.2.1/vendor/plugins/redmine_ldap_sync/lib/redmine_ldap_s ync/redmine_ext/auth_source_ldap_patch.rb:46:in sync_users' /usr/local/lib/redmine-1.2.1/vendor/plugins/redmine_ldap_sync/lib/tasks/sync_use rs.rake:6 /usr/local/lib/redmine-1.2.1/vendor/plugins/redmine_ldap_sync/lib/tasks/sync_use rs.rake:6:ineach'

[thorin]

After a better look, it seems to be that the login names of one of the users
is not very friendly and makes the plugin crash when parsing it to create
the user search filter.

Because of the nil:NilClass my first guess would be an empty username, if
that makes any sense.

-- EDITED --
It has to be a user without an username.
There must be an entry with the user's objectClass that has no username. Ie, with the username attribute missing.

I'll add a check on the code to prevent that case.

[cforce]

The cause was this string in DN =DDV, ou=GR..i changed it to DN =DDV and the error was gone