Comment 7 for bug 375896

After a debug build of rarian, I see:
(gdb) bt
#0 0x00007fd3763337b0 in strcmp () from /lib/libc.so.6
#1 0x00007fd3774d23fe in ?? () from /usr/lib/librarian.so.0
#2 0x00007fd3774d24a7 in ?? () from /usr/lib/librarian.so.0
#3 0x00007fd3774d21ff in ?? () from /usr/lib/librarian.so.0
#4 0x00007fd3774d1e0a in ?? () from /usr/lib/librarian.so.0
#5 0x00007fd3774d1e97 in rrn_for_each_in_category (
    funct=0x4212e0 <rrn_add_document>, category=0x237fb00 "Core",
    user_data=0x1de9160) at rarian-main.c:126
#6 0x00000000004209e5 in toc_process (toc=<value optimized out>)
    at yelp-toc.c:572
#7 0x00007fd3777515c4 in ?? () from /usr/lib/libglib-2.0.so.0
#8 0x00007fd37662c3ba in start_thread () from /lib/libpthread.so.0
#9 0x00007fd3763991bd in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()