Steps to reproduce:
Actually I do not know how to reproduce the crash. I suppose I have something wrong in my environment, as yelp worked fine some time ago. Currently yelp started to crash with the following bt:

Stack trace:
gdb yelp
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) r
Starting program: /usr/bin/yelp
[Thread debugging using libthread_db enabled]
[New Thread -1227691376 (LWP 18954)]
[New Thread -1231631472 (LWP 18957)]

(yelp:18954): GLib-CRITICAL **: g_hash_table_insert: assertion `hash_table != NULL' failed
[New Thread -1261778032 (LWP 18958)]
yelp-window.c:919: yelp_window_load: entering
yelp-window.c:920:   uri = "x-yelp-toc:"
yelp-window.c:1008: window_do_load: entering
yelp-window.c:919: yelp_window_load: entering
yelp-window.c:920:   uri = "x-yelp-toc:"
yelp-window.c:1008: window_do_load: entering
yelp-window.c:919: yelp_window_load: entering
[snip (really a lot of similar lines)]
yelp-window.c:919: yelp_window_load: entering
yelp-window.c:920:   uri = "x-yelp-toc:"
yelp-window.c:1008: window_do_load: entering
yelp-window.c:919: yelp_window_load: entering
yelp-window.c:920:   uri = "x-yelp-toc:"
yelp-window.c:1008: window_do_load: entering
yelp-window.c:919: yelp_window_load: entering
yelp-window.c:920:   uri = "x-yelp-toc:"

Program received signal SIGSEGV, Segmentation fault.

+ Trace 118086

Other information: