(gdb) bt
#0  0x40027d92 in pthread_mutex_lock () from /lib/libpthread.so.0
#1  0x4018682d in free () from /lib/libc.so.6
#2  0x0807707b in pbx_extension_helper (c=0x0, context=0x8eabbd0 "tack\n",
    exten=0x4067803c "701", priority=1, callerid=0x0, action=1076070728)
    at pbx.c:831
#3  0x0807dd00 in ast_pbx_run (c=0x40677df0) at pbx.c:1879
#4  0x4051b1d8 in ss_thread (data=0x40677df0) at chan_zap.c:4865
#5  0x4002783e in pthread_start_thread () from /lib/libpthread.so.0
#6  0x401dd04a in clone () from /lib/libc.so.6
(gdb) frame 2
#2  0x0807707b in pbx_extension_helper (c=0x0, context=0x8eabbd0 "tack\n",
    exten=0x4067803c "701", priority=1, callerid=0x0, action=1076070728)
    at pbx.c:831
831                             free(*e);
(gdb) print context
$1 = 0x8eabbd0 "tack\n"
(gdb) bt full
#0  0x40027d92 in pthread_mutex_lock () from /lib/libpthread.so.0
No symbol table info available.
#1  0x4018682d in free () from /lib/libc.so.6
No symbol table info available.
#2  0x0807707b in pbx_extension_helper (c=0x0, context=0x8eabbd0 "tack\n",
    exten=0x4067803c "701", priority=1, callerid=0x0, action=1076070728)
    at pbx.c:831
        e = (struct ast_exten *) 0x8eabbd0
        sw = (struct ast_switch *) 0x0
        data = 0x0
        newstack = 1
        res = 1076070728
        status = 4
        incstack = {0x406249f0 "tcdf", 0x40624f80 "corp", 0x40613478 "local",
  0x406124e8 "emergency", 0x40612c88 "information",
  0xfff0 <Address 0xfff0 out of bounds>, 0x0,
  0x8fff8 <Address 0x8fff8 out of bounds>,
  0xfff80000 <Address 0xfff80000 out of bounds>,
  0xfff00008 <Address 0xfff00008 out of bounds>,
  0x80008 <Address 0x80008 out of bounds>,
  0x8fff0 <Address 0x8fff0 out of bounds>,
  0x200020 <Address 0x200020 out of bounds>,
  0xfff80008 <Address 0xfff80008 out of bounds>, 0x0,
  0x100008 <Address 0x100008 out of bounds>, 0x0, 0x0,
  0x80000 <Address 0x80000 out of bounds>,
  0xffe0fff0 <Address 0xffe0fff0 out of bounds>,
  0xfff0fff0 <Address 0xfff0fff0 out of bounds>,
  0xfff0fff0 <Address 0xfff0fff0 out of bounds>,
  0xfff0 <Address 0xfff0 out of bounds>,
  0x180000 <Address 0x180000 out of bounds>,
  0x80018 <Address 0x80018 out of bounds>,
  0xffe8fff8 <Address 0xffe8fff8 out of bounds>, 0xbd9ff2a1 "1000",
  0x8087745 "\205ÀuÞ\210\\=", 0x80d98b0 "( )-.",
  0x30 <Address 0x30 out of bounds>, 0x4023939c "",
  0x8ebc8c8 "1096328544.5577", 0x8ebc8c8 "1096328544.5577",
  0x40677df0 "Zap/1-1", 0x813ee68 "", 0x808c99b "\213\233à\003",
  0x8ebc8c8 "1096328544.5577", 0x406795a4 "1096328544.5577",
  0x1f <Address 0x1f out of bounds>, 0x40239340 "", 0x813ee68 "",
  0x8ecee28 "(", 0xbd9ff29c "on", 0x4002fb84 "\204ê", 0x40239340 "",
  0x8ebc608 "\"Reception\" <1000>", 0xbd9ff295 "Reception", 0xbd9ff2a1 "1000",
  0x63655200 <Address 0x63655200 out of bounds>,
  0x69747065 <Address 0x69747065 out of bounds>,
  0x20006e6f <Address 0x20006e6f out of bounds>,
  0x30303100 <Address 0x30303100 out of bounds>,
  0x30 <Address 0x30 out of bounds>, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x808c202 "\213\233à\003", 0x8ebc888 "e¥XAã\213\n", 0x0, 0x0, 0x0}
---Type <return> to continue, or q <return> to quit---
        passdata = "701", '\0' <repeats 8188 times>
        stacklen = 5
        tmp = "\033[1;36;40mParkedCall\033[0;37;40m", '\0' <repeats 49 times>
        tmp2 = "\033[1;35;40mZap/1-1\033[0;37;40m\000\000\000\000\000Sep 27 16:42:26", '\0' <repeats 32 times>
        tmp3 = "\033[1;35;40m701\033[0;37;40m\000@\223#@hÈ\001\000t±\237½ê\177\002@P\223#@\035\000\000\000Þ³\002@H\211#@H\211#@\000\000\000\000¬±\237½\000\000\000\000@\223#@b¯\002@¸þæ\b\000\000\000\000!±\002@ê\177\002@\001\000\000\000\000\000\000\000àû\237½\204û\002@\024ü\016\b¸þæ\ḇ\237½¸\177\002@$ü\016\b\024\000\000\000\000\000\000\000\001", '\0' <repeats 15 times>, "]\025\v\b\024ü\016\b\000\000\000\000\034²\237½\000\000\000\000\210ø\023\b\204ú\237½\001\000\000\000\237U\a\b\204ú\237½\001\000\000\000\210ø\023\b\000"...
        __PRETTY_FUNCTION__ = "pbx_extension_helper"
#3  0x0807dd00 in ast_pbx_run (c=0x40677df0) at pbx.c:1879
        digit = 0 '\0'
        exten = '\0' <repeats 255 times>
        pos = 0
        waittime = -1113590972
        res = 0
        __PRETTY_FUNCTION__ = "ast_pbx_run"
#4  0x4051b1d8 in ss_thread (data=0x40677df0) at chan_zap.c:4865
        f = (struct ast_frame *) 0x40027d80
        p = (struct zt_pvt *) 0x813ee68
        exten = "701", '\0' <repeats 76 times>
        exten2 = '\0' <repeats 79 times>
        buf = '\0' <repeats 255 times>
        cid = '\0' <repeats 255 times>
        dtmfcid = '\0' <repeats 299 times>
        dtmfbuf = '\0' <repeats 299 times>
        cs = (struct callerid_state *) 0x0
        name = 0x0
        number = 0x0
        curRingData = {0, 0, 0}
        receivedRingT = 1073905024
        counter1 = 1080524272
        counter = 0
        flags = 0
        i = 0
        getforward = 0
        len = 3
        res = 1931507557
        __PRETTY_FUNCTION__ = "ss_thread"
#5  0x4002783e in pthread_start_thread () from /lib/libpthread.so.0
No symbol table info available.
#6  0x401dd04a in clone () from /lib/libc.so.6
No symbol table info available.
(gdb)