(gdb) bt
#0  0x00477808 in strcasecmp () from /lib/tls/libc.so.6
#1  0x00585a86 in changethread (data=0x89fd370) at app_queue.c:544
#2  0x080e5a6f in dummy_start (data=0x8a147f0) at utils.c:538
#3  0x00a7d371 in start_thread () from /lib/tls/libpthread.so.0
#4  0x004d4ffe in clone () from /lib/tls/libc.so.6

(gdb) bt full
#0  0x00477808 in strcasecmp () from /lib/tls/libc.so.6
No symbol table info available.
#1  0x00585a86 in changethread (data=0x89fd370) at app_queue.c:544
        q = (struct call_queue *) 0x8b5bee0
        sc = (struct statechange *) 0x89fd370
        cur = (struct member *) 0x30
        curint = (struct member_interface *) 0x8bae098
        loc = 0xb7990396 "group1@q-groups"
        technology = 0xb7990390 "Local"
        __PRETTY_FUNCTION__ = "changethread"
#2  0x080e5a6f in dummy_start (data=0x8a147f0) at utils.c:538
        _buffer = {__routine = 0x8067a09 <ast_unregister_thread>, __arg = 0xb7990bb0, __canceltype = -1214708648, __prev = 0x0}
        ret = (void *) 0x5326f4
        a = {start_routine = 0x585847 <changethread>, data = 0x89fd370, name = 0x8baa7a8 "changethread         started at [  587] app_queue.c statechange_queue()"}
#3  0x00a7d371 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#4  0x004d4ffe in clone () from /lib/tls/libc.so.6
No symbol table info available.