#0  0x0807fe68 in ast_channel_free (chan=0xa1b5b30) at channel.c:1234
1234            while ((f = AST_LIST_REMOVE_HEAD(&chan->readq, frame_list)))
(gdb) bt
#0  0x0807fe68 in ast_channel_free (chan=0xa1b5b30) at channel.c:1234
#1  0x08080933 in ast_hangup (chan=0xa1b5b30) at channel.c:1496
#2  0x080c0d06 in __ast_pbx_run (c=0xa1b5b30) at pbx.c:2563
#3  0x080c0ed6 in pbx_thread (data=0xa1b5b30) at pbx.c:2623
#4  0x080fd1e8 in dummy_start (data=0xa1b6610) at utils.c:852
#5  0x0078f2db in start_thread () from /lib/libpthread.so.0
#6  0x006e912e in clone () from /lib/libc.so.6
(gdb)

(gdb) bt full
#0  0x0807fe68 in ast_channel_free (chan=0xa1b5b30) at channel.c:1234
        cur = (struct ast_frame *) 0x680fec0
        fd = 187
        vardata = (struct ast_var_t *) 0x0
        f = (struct ast_frame *) 0xb5616f68
        headp = (struct varshead *) 0xa1b5e74
        datastore = (struct ast_datastore *) 0x0
        name = "Local/9119891365729@default-4d6b,2\000\000\\±V¶call,all", '\0' <repeats 31 times>
        __PRETTY_FUNCTION__ = "ast_channel_free"
#1  0x08080933 in ast_hangup (chan=0xa1b5b30) at channel.c:1496
        res = 0
        cdr = (struct ast_cdr *) 0xa1b5fb0
        __PRETTY_FUNCTION__ = "ast_hangup"
#2  0x080c0d06 in __ast_pbx_run (c=0xa1b5b30) at pbx.c:2563
        found = 1
        res = 0
        autoloopflag = 0
        error = 1
        __PRETTY_FUNCTION__ = "__ast_pbx_run"
#3  0x080c0ed6 in pbx_thread (data=0xa1b5b30) at pbx.c:2623
        c = (struct ast_channel *) 0xa1b5b30
#4  0x080fd1e8 in dummy_start (data=0xa1b6610) at utils.c:852
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {7987188, 0, -1235829872, -1235831864, -289624152, 1357237616}, __mask_was_saved = 0}},
  __pad = {0xb656b480, 0x0, 0x0, 0x0}}
        __cancel_routine = (void (*)(void *)) 0x806942d <ast_unregister_thread>
        __cancel_arg = (void *) 0xb656bb90
        not_first_call = 0
        ret = (void *) 0x72756e
        a = {start_routine = 0x80c0ebf <pbx_thread>, data = 0xa1b5b30,
  name = 0xa1b6620 "pbx_thread", ' ' <repeats 11 times>, "started at [ 2647] pbx.c ast_pbx_start()"}
#5  0x0078f2db in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#6  0x006e912e in clone () from /lib/libc.so.6
No symbol table info available.