Description of problem:
Most likely, this occurred while logging in via SSH. I am using the beta of fish 2.0 as my shell.

Version-Release number of selected component:
tmux-1.7-1.fc18

Additional info:
backtrace_rating: 3
cmdline:        /usr/bin/tmux new-session -s brian-remote
executable:     /usr/bin/tmux
kernel:         3.7.9-201.fc18.x86_64
remote_result:  NOTFOUND
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 ??
 #1 bufferevent_disable at bufferevent.c:505
 #2 tty_stop_tty at tty.c:259
 #3 tty_close at tty.c:307
 #4 tty_free at tty.c:327
 #5 server_client_lost at server-client.c:144
 #6 event_process_active_single_queue at event.c:1340
 #7 event_process_active at event.c:1407
 #8 event_base_loop at event.c:1604
 #9 event_loop at event.c:1518