--- RuntimeError from thread: load threads for thread-index-mode

/home/magus/src/sup/lib/sup/index.rb:555:in `find_docid'
/home/magus/src/sup/lib/sup/index.rb:560:in `find_doc'
/home/magus/src/sup/lib/sup/index.rb:570:in `get_entry'
/home/magus/src/sup/lib/sup/index.rb:200:in `build_message'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/home/magus/src/sup/lib/sup/index.rb:579:in `synchronize'
/home/magus/src/sup/lib/sup/index.rb:200:in `build_message'
/home/magus/src/sup/lib/sup/index.rb:194:in `each_message_in_thread_for'
/home/magus/src/sup/lib/sup/thread.rb:349:in `call'
/home/magus/src/sup/lib/sup/thread.rb:349:in `load_thread_for_message'
/home/magus/src/sup/lib/sup/index.rb:194:in `each_message_in_thread_for'
/home/magus/src/sup/lib/sup/index.rb:194:in `each'
/home/magus/src/sup/lib/sup/index.rb:194:in `each_message_in_thread_for'
/home/magus/src/sup/lib/sup/thread.rb:347:in `load_thread_for_message'
/home/magus/src/sup/lib/sup/thread.rb:339:in `load_n_threads'
/home/magus/src/sup/lib/sup/index.rb:155:in `each_id_by_date'
/home/magus/src/sup/lib/sup/index.rb:250:in `each_id'
/home/magus/src/sup/lib/sup/index.rb:250:in `each'
/home/magus/src/sup/lib/sup/index.rb:250:in `each_id'
/home/magus/src/sup/lib/sup/index.rb:155:in `each_id_by_date'
/home/magus/src/sup/lib/sup/thread.rb:334:in `load_n_threads'
/home/magus/src/sup/lib/sup/modes/thread-index-mode.rb:640:in `__unprotected_load_n_threads'
(eval):12:in `load_n_threads'
/home/magus/src/sup/lib/sup/modes/thread-index-mode.rb:624:in `load_n_threads_background'
/home/magus/src/sup/lib/sup.rb:78:in `reporting_thread'
/home/magus/src/sup/lib/sup.rb:76:in `initialize'
/home/magus/src/sup/lib/sup.rb:76:in `new'
/home/magus/src/sup/lib/sup.rb:76:in `reporting_thread'
/home/magus/src/sup/lib/sup/modes/thread-index-mode.rb:623:in `load_n_threads_background'
/home/magus/src/sup/lib/sup/modes/thread-index-mode.rb:694:in `__unprotected_load_threads'
(eval):12:in `load_threads'
/home/magus/src/sup/bin/sup:223