(gdb) bt
#0  0x0058d777 in pthread_mutex_lock () from /lib/tls/libpthread.so.0
#1  0x002fb990 in local_fixup (oldchan=0x9264d60, newchan=0xb4a01ef8)
    at chan_local.c:193
#2  0x0805f461 in ast_do_masquerade (original=0x9264d60) at channel.c:2300
#3  0x0805ae58 in ast_hangup (chan=0x9264d60) at channel.c:696
#4  0x008a1a62 in dial_exec (chan=0x9263550, data=0x0) at app_dial.c:1041
#5  0x08074206 in pbx_exec (c=0x9263550, app=0x91e6f48, data=0xb4fc5440,
    newstack=1) at pbx.c:471
#6  0x0807c0ff in pbx_extension_helper (c=0x9263550,
    context=0x92636a8 "macro-dial",
    exten=0x9263550 "Local/1800@from-internal-0642,2", priority=10,
    callerid=0x91d90xx "\"425308\" <425308>", action=153499548)
    at pbx.c:1290
#7  0x0807af25 in ast_spawn_extension (c=0xb4a01ef8,
    context=0xb4a01ef8 "IAX2/pbx/1<MASQ>",
    exten=0xb4a01exx "IAX2/pbx/1<MASQ>", priority=-1264574728,
    callerid=0xb4a01exx "IAX2/pbx/1<MASQ>") at pbx.c:1772
#8  0x003da464 in macro_exec (chan=0x9263550, data=0x9263550)
    at app_macro.c:141
#9  0x08074206 in pbx_exec (c=0x9263550, app=0x91d8f38, data=0xb4fc9da0,
    newstack=1) at pbx.c:471
#10 0x0807c0ff in pbx_extension_helper (c=0x9263550,
    context=0x92636a8 "macro-dial",
    exten=0x9263550 "Local/1800@from-internal-0642,2", priority=7,
    callerid=0x91d90xx "\"425308xxxx\" <425308xxxx>", action=153499548)
    at pbx.c:1290
#11 0x0807af25 in ast_spawn_extension (c=0xb4a01ef8,
    context=0xb4a01ef8 "IAX2/pbx/1<MASQ>",
    exten=0xb4a01ef8 "IAX2/pbx/1<MASQ>", priority=-1264574728,
    callerid=0xb4a01exx "IAX2/pbx/1<MASQ>") at pbx.c:1772
#12 0x003da464 in macro_exec (chan=0x9263550, data=0x9263550)
    at app_macro.c:141
#13 0x08074206 in pbx_exec (c=0x9263550, app=0x91d8f38, data=0xb4fce700,
    newstack=1) at pbx.c:471
#14 0x0807c0ff in pbx_extension_helper (c=0x9263550,
    context=0x92636a8 "macro-dial",
    exten=0x9263550 "Local/1800@from-internal-0642,2", priority=1,
    callerid=0x91a63xx "    -- Goto (macro-dial,s,4)\n", action=153499548)
    at pbx.c:1290
#15 0x0807622a in ast_pbx_run (c=0x9263550) at pbx.c:1772
#16 0x0807c7c1 in pbx_thread (data=0xb4a01ef8) at pbx.c:1995
#17 0x0058bde8 in start_thread () from /lib/tls/libpthread.so.0
#18 0x0071293a in clone () from /lib/tls/libc.so.6