Core was generated by `asterisk -gc'.
Program terminated with signal 11, Segmentation fault.
#0  0x009d81d3 in strlen () from /lib/libc.so.6
(gdb) bt
#0  0x009d81d3 in strlen () from /lib/libc.so.6
#1  0x009a7c0e in vfprintf () from /lib/libc.so.6
#2  0x009c83f4 in vsnprintf () from /lib/libc.so.6
#3  0x0817e5b5 in __ast_str_helper (buf=0xb7a18580, max_len=0, append=1, 
    fmt=0x13e1f8 ",%s", ap=0xb7a1855c "\004") at strings.c:72
#4  0x0818fb26 in ast_str_append_va (buf=0xb7a18580, max_len=0, 
    fmt=0x13e1f8 ",%s", ap=0xb7a1855c "\004")
    at /home/steve/projects/asterisk/asterisk-1.8.0/include/asterisk/strings.h:787
#5  0x0818fc68 in ast_str_append (buf=0xb7a18580, max_len=0, 
    fmt=0x13e1f8 ",%s")
    at /home/steve/projects/asterisk/asterisk-1.8.0/include/asterisk/strings.h:859
#6  0x0013a4f8 in send_eivr_event (handle=0xb7c0e9c8, event=84 'T', 
    data=0x4 <Address 0x4 out of bounds>, chan=0x88d6ec0)
    at app_externalivr.c:160
#7  0x0013d0d1 in eivr_comm (chan=0x88d6ec0, u=0xb7a19ab4, 
    eivr_events_fd=0xb7a1ab3c, eivr_commands_fd=0xb7a1ab30, 
    eivr_errors_fd=0xb7a1ab28, args=0xb7a192f0, flags=...)
    at app_externalivr.c:766
#8  0x0013c028 in app_exec (chan=0x88d6ec0, 
    data=0xb7a1cd58 "/var/lib/asterisk/agi-bin/fndatyivr.py")
    at app_externalivr.c:559
#9  0x08132516 in pbx_exec (c=0x88d6ec0, app=0x8892de0, 
    data=0xb7a1cd58 "/var/lib/asterisk/agi-bin/fndatyivr.py") at pbx.c:1399
#10 0x0813b7f2 in pbx_extension_helper (c=0x88d6ec0, con=0x0, 
    context=0x88d722c "internal", exten=0x88d727c "70", priority=1, label=0x0, 
    callerid=0x88cca50 "73", action=E_SPAWN, found=0xb7a1f25c, 
    combined_find_spawn=1) at pbx.c:4078
#11 0x0813d07b in ast_spawn_extension (c=0x88d6ec0, 
    context=0x88d722c "internal", exten=0x88d727c "70", priority=1, 
    callerid=0x88cca50 "73", found=0xb7a1f25c, combined_find_spawn=1)
    at pbx.c:4577
#12 0x0813da03 in __ast_pbx_run (c=0x88d6ec0, args=0x0) at pbx.c:4675
#13 0x0813f4b1 in pbx_thread (data=0x88d6ec0) at pbx.c:4986
#14 0x0819056a in dummy_start (data=0x88d9828) at utils.c:971
#15 0x00ace832 in start_thread () from /lib/libpthread.so.0
#16 0x00a39e0e in clone () from /lib/libc.so.6