termtterのエラーログです

to hitode909

[DEBUG] call_hooks: launched #<Termtter::Hook:0xb7415d90 @name=:fetch_my_lists, @points=[:launched], @exec_proc=#<Proc:0xb74202f4@./../lib/plugins/defaults/list.rb:4>>       
[DEBUG] rubytter_proxy: lists("mizchi")
[DEBUG] rubytter_proxy: lists("mizchi"), 0.60sec
[DEBUG] call_hooks: [:point => post_lists, :args => ["mizchi"]]
[DEBUG] call_hooks: [:point => post_lists, :args => ["mizchi"]], done
[DEBUG] call_hooks: [:point => launched, :args => []], done
./termtter:15
undefined method `tr' for nil:NilClass
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:175:in `post'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:173:in `map'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:173:in `post'
./../lib/plugins/irc_gw.rb:206:in `join_members'
./../lib/plugins/irc_gw.rb:200:in `each'
./../lib/plugins/irc_gw.rb:200:in `join_members'
./../lib/plugins/irc_gw.rb:193:in `sync_commands'
./../lib/plugins/irc_gw.rb:137:in `on_user'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:99:in `send'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:99:in `start'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:27:in `start'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:22:in `start'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:21:in `loop'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:21:in `start'
/usr/lib/ruby/gems/1.8/gems/net-irc-0.0.9/lib/net/irc/server.rb:20:in `start'
./../lib/plugins/irc_gw.rb:232
./../lib/plugins/irc_gw.rb:231:in `start'
./../lib/plugins/irc_gw.rb:231
./../lib/termtter/client.rb:38:in `load'
./../lib/termtter/client.rb:38:in `plug'
/home/mizchi/.termtter/config:72
./../lib/termtter/client.rb:302:in `call'
./../lib/termtter/client.rb:302:in `eval_init_block'
./../lib/termtter/client.rb:323:in `run'