/home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/git-1.2.5/lib/git/lib.rb:153:in `process_commit_data': undefined method `[]=' for nil:NilClass (NoMethodError)
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/git-1.2.5/lib/git/lib.rb:135:in `each'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/git-1.2.5/lib/git/lib.rb:135:in `process_commit_data'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/git-1.2.5/lib/git/lib.rb:93:in `full_log_commits'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/git-1.2.5/lib/git/log.rb:108:in `run_log'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/git-1.2.5/lib/git/log.rb:101:in `check_log'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/git-1.2.5/lib/git/log.rb:89:in `first'
        from /home/yeban/src/mostfit/slices/maintainer/app/models/deployment_item.rb:15:in `create_from_last_commit'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/dm-core-1.1.0/lib/dm-core/repository.rb:114:in `scope'
        from /home/yeban/src/mostfit/slices/maintainer/app/models/deployment_item.rb:13:in `create_from_last_commit'
        from /home/yeban/src/mostfit/slices/maintainer/lib/maintainer.rb:55:in `activate'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/dm-core-1.1.0/lib/dm-core/repository.rb:114:in `scope'
        from /home/yeban/src/mostfit/slices/maintainer/lib/maintainer.rb:55:in `activate'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-slices-1.1.3/lib/merb-slices.rb:121:in `run'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-slices-1.1.3/lib/merb-slices/module.rb:258:in `call'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-slices-1.1.3/lib/merb-slices/module.rb:258:in `each_slice'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-slices-1.1.3/lib/merb-slices/module.rb:256:in `each'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-slices-1.1.3/lib/merb-slices/module.rb:256:in `each_slice'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-slices-1.1.3/lib/merb-slices.rb:119:in `run'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-core-1.1.3/lib/merb-core/bootloader.rb:97:in `run'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-core-1.1.3/lib/merb-core/server.rb:172:in `bootup'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-core-1.1.3/lib/merb-core/server.rb:42:in `start'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-core-1.1.3/lib/merb-core.rb:165:in `start'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/gems/merb-core-1.1.3/bin/merb:20
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/bin/merb:19:in `load'
        from /home/yeban/.rvm/gems/ree-1.8.7-2011.03@mn2/bin/merb:19