(gdb) 
...
Core was generated by `asterisk -cg'.
Program terminated with signal 11, Segmentation fault.
[New process 31349]
...
[New process 31320]
#0  0x00007f0496fafcdf in fread () from /lib/libc.so.6

(gdb) bt full
#0  0x00007f0496fafcdf in fread () from /lib/libc.so.6
No symbol table info available.
#1  0x00007f0482337736 in pcm_read (s=0x23bda28, whennext=0x406f2c3c) at /usr/include/bits/stdio2.h:287
        res = <value optimized out>
        __PRETTY_FUNCTION__ = "pcm_read"
#2  0x0000000000484e8c in ast_readaudio_callback (s=0x23bda28) at file.c:716
        fr = (struct ast_frame *) 0x7770e0
        whennext = 0
        __PRETTY_FUNCTION__ = "ast_readaudio_callback"
#3  0x0000000000485059 in ast_fsread_audio (data=0x23bdb48) at file.c:760
        res = 4
#4  0x00000000004523e4 in __ast_read (chan=0x2388d80, dropaudio=0) at channel.c:2517
        data = <value optimized out>
        res = <value optimized out>
        f = (struct ast_frame *) 0x7770e0
        blah = 32516
        cause = <value optimized out>
        __PRETTY_FUNCTION__ = "__ast_read"
#5  0x00007f04957f4c96 in agi_exec_full (chan=0x2388d80, data=<value optimized out>, enhanced=<value optimized out>, dead=0) at res_agi.c:2856
        status = 0
        res = AGI_RESULT_SUCCESS
        buf = "agi://10.9.2.1:4573/GetAvailableAgent", '\0' <repeats 2010 times>
        fds = {33, 33}
        efd = -1
        pid = -1
        args = {argc = 1, argv = 0x406f2e58, arg = {0x406f3b90 "agi://10.9.2.1:4573/GetAvailableAgent", 0x0 <repeats 127 times>}}
        agi = {fd = 33, audio = -1, ctrl = 33, fast = 1, speech = 0x0}
        __PRETTY_FUNCTION__ = "agi_exec_full"
#6  0x00000000004bffa7 in pbx_extension_helper (c=0x2388d80, con=<value optimized out>, context=0x2389132 "pjtypePB", exten=0x2389182 "1", priority=1, label=0x0, 
    callerid=0x2475720 "5554443333", action=E_SPAWN, found=0x406f8f1c, combined_find_spawn=1) at pbx.c:1342
        e = <value optimized out>
        app = (struct ast_app *) 0x7f0490012800
        res = <value optimized out>
        q = {incstack = {0x0 <repeats 128 times>}, stacklen = 0, status = 5, swo = 0x0, data = 0x0, foundcontext = 0x2389132 "pjtypePB"}
        passdata = "agi://10.9.2.1:4573/GetAvailableAgent", '\0' <repeats 179 times>, "���\226\004\177\000\000\002\000\000\000\000\000\000\000\020vo@\000\000\000\000 vo@\000\000\000\000f\025\233\202\004\177\000\000h\025\233\202\004\177\000\000���\226\004\177", '\0' <repeats 26 times>, "Pvo@\000\000\000\000`vo@\000\000\000\000�=\233\202�\n\000\000\210uo@\000\000\000\000�uo@\000\000\000\000Puo@\000\000\000\000�uo@", '\0' <repeats 32 times>, "�\n\000\000\000\004\000\000\000\000\000\000q\000\000\000\000\000\000\000\002\000\000\000\000\000\000"...
        matching_action = <value optimized out>
        __PRETTY_FUNCTION__ = "pbx_extension_helper"
#7  0x00000000004c1cc1 in __ast_pbx_run (c=0x2388d80, args=0x0) at pbx.c:4119
        dst_exten = "1\000\000\000\000\000\000\000\000*+\227\004\177\000\000p�I\002\000\000\000\000\210�I\002\000\000\000\000��I\002\000\000\000\0008�I\002\000\000\000\000��I\002\000\000\000\000�\020�\226\004\177\000\000 �I\002\000\000\000\000k�I\000\000\000\000\000\030\000\000\000\000\000\000\000��S\000\000\000\000\000�B\002\000\000\000\000\210�I\002\000\000\000\000��I\002\000\000\000\000\004\000\000\000\000\000\000\000�B\002\000\000\000\0008�I\002\000\000\000\000 \234R", '\0' <repeats 29 times>, "�\034P\002\000\000\000\000\000*+\227\004\177\000\000\000\000\000\000\000\000\000\000\030\000\000\000\000\000\000\000p�\000\000\000\000\000\000\220cR"...
        pos = 1
        digit = 5000
        invalid = <value optimized out>
        found = 1
        res = 49
        error = 0
        __PRETTY_FUNCTION__ = "__ast_pbx_run"
#8  0x00000000004c314b in pbx_thread (data=0x23bdb48) at pbx.c:4496
No locals.
#9  0x00000000004fdf7c in dummy_start (data=<value optimized out>) at utils.c:968
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {38391904, 1890725320224528624, 0, 139657701154880, 1081055568, 1075506592, 1890865839189645552, 
        1890724829277313264}, __mask_was_saved = 0}}, __pad = {0x406f91c0, 0x0, 0x7f04972ad888, 0x7f04972ad890}}
        not_first_call = <value optimized out>
        ret = <value optimized out>
#10 0x00007f0496b2c3ea in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#11 0x00007f049702bcbd in clone () from /lib/libc.so.6
No symbol table info available.
#12 0x0000000000000000 in ?? ()
No symbol table info available.