#0  0x0807a4c6 in ast_channel_alloc (needqueue=0, state=1, cid_num=0x0, cid_name=0x0, acctcode=0x8d5efc8 "Zap/pseudo-611842554",
    exten=0x13e3 <Address 0x13e3 out of bounds>, context=0x800000 "", amaflag=140584, name_fmt=0x2d <Address 0x2d out of bounds>)
    at strings.h:35
35              return (!s || (*s == '\0'));
(gdb) bt
#0  0x0807a4c6 in ast_channel_alloc (needqueue=0, state=1, cid_num=0x0, cid_name=0x0, acctcode=0x8d5efc8 "Zap/pseudo-611842554", 
    exten=0x13e3 <Address 0x13e3 out of bounds>, context=0x800000 "", amaflag=140584, name_fmt=0x2d <Address 0x2d out of bounds>)
    at strings.h:35
#1  0xb738f0a7 in zt_new (i=0x8e5ebc0, state=1, startpbx=0, index=0, law=0, transfercapability=0) at chan_zap.c:5173
#2  0xb73a1fce in zt_request (type=0xb71a3848 "zap", format=64, data=0xb71a3858, cause=0xb65d6c38) at chan_zap.c:7815
#3  0x0807d3dc in ast_request (type=0xb71a3848 "zap", format=64, data=0x8dd3980, cause=0x0) at channel.c:3092
#4  0xb7196034 in build_conf (confno=0xb65d6d10 "1209", pin=0xb71a3af4 "", pinadmin=0xb71a3af4 "", make=1, dynamic=0, refcount=1)
    at app_meetme.c:755
#5  0xb719af5f in find_conf (chan=0x8d9e668, confno=0xb65d7120 "1209", make=1, dynamic=0, dynamic_pin=0xb65d70d0 "", 
    pin_buf_len=80, refcount=1, confflags=0xb65d7068) at strings.h:34
#6  0xb719b7be in conf_exec (chan=0x8d9e668, data=0xb65d74fc) at app_meetme.c:2621
#7  0x080bd69c in pbx_exec (c=0x8d9e668, app=0xb7b0e9b8, data=0xb65d74fc) at pbx.c:532
#8  0xb71e63f1 in handle_exec (chan=0x8dd3980, agi=0x8dd3980, argc=3, argv=0xb65d72f0) at res_agi.c:1116
#9  0xb71e8798 in agi_exec_full (chan=0x8d9e668, data=Variable "data" is not available.
) at res_agi.c:1812
#10 0x080c8361 in pbx_extension_helper (c=0x8d9e668, con=Variable "con" is not available.
) at pbx.c:532
#11 0x080c969f in __ast_pbx_run (c=0x8d9e668) at pbx.c:2288
#12 0x080cb64e in pbx_thread (data=0x8dd3980) at pbx.c:2601
#13 0x080f8335 in dummy_start (data=0xe) at utils.c:545
#14 0xb7ec7ce1 in pthread_start_thread () from /lib/i686/libpthread.so.0
#15 0xb7e3ad3a in clone () from /lib/i686/libc.so.6
(gdb) bt full
#0  0x0807a4c6 in ast_channel_alloc (needqueue=0, state=1, cid_num=0x0, cid_name=0x0, acctcode=0x8d5efc8 "Zap/pseudo-611842554", 
    exten=0x13e3 <Address 0x13e3 out of bounds>, context=0x800000 "", amaflag=140584, name_fmt=0x2d <Address 0x2d out of bounds>)
    at strings.h:35
        __zz__ = Variable "__zz__" is not available.
(gdb) q