--- Ferret::StateError from thread: load threads for thread-index-mode
State Error occured at <except.c>:93 in xraise
Error occured in index.c:4150 - sr_get_lazy_doc
	Document 6 has already been deleted

/var/lib/gems/1.8/gems/ferret-0.11.6/lib/ferret/index.rb:421:in `[]'
/var/lib/gems/1.8/gems/ferret-0.11.6/lib/ferret/index.rb:421:in `[]'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/var/lib/gems/1.8/gems/ferret-0.11.6/lib/ferret/index.rb:413:in `[]'
./lib/sup/index.rb:359:in `build_message'
./lib/sup/index.rb:340:in `each_message_in_thread_for'
./lib/sup/thread.rb:341:in `call'
./lib/sup/thread.rb:341:in `load_thread_for_message'
./lib/sup/index.rb:352:in `each_message_in_thread_for'
./lib/sup/index.rb:352:in `each'
./lib/sup/index.rb:352:in `each_message_in_thread_for'
./lib/sup/thread.rb:339:in `load_thread_for_message'
./lib/sup/thread.rb:331:in `load_n_threads'
./lib/sup/index.rb:261:in `each_id_by_date'
./lib/sup/index.rb:261:in `each'
./lib/sup/index.rb:261:in `each_id_by_date'
./lib/sup/thread.rb:326:in `load_n_threads'
./lib/sup/modes/thread-index-mode.rb:499:in `__unprotected_load_n_threads'
(eval):12:in `load_n_threads'
./lib/sup/modes/thread-index-mode.rb:483:in `load_n_threads_background'
./lib/sup.rb:73:in `reporting_thread'
./lib/sup.rb:71:in `initialize'
./lib/sup.rb:71:in `new'
./lib/sup.rb:71:in `reporting_thread'
./lib/sup/modes/thread-index-mode.rb:482:in `load_n_threads_background'
./lib/sup/modes/thread-index-mode.rb:552:in `__unprotected_load_threads'
(eval):12:in `load_threads'
./lib/sup/modes/search-results-mode.rb:34:in `spawn_from_query'
bin/sup:262
--- SystemExit from thread: main
State Error occured at <except.c>:93 in xraise
Error occured in index.c:4150 - sr_get_lazy_doc
	Document 6 has already been deleted

./lib/sup.rb:77:in `select'
./lib/sup/buffer.rb:31:in `nonblocking_getch'
bin/sup:227