#0  0x0808b160 in ast_yylex (yylval_param=0x20e03bc, yylloc_param=0x20e03ac, yyscanner=0x7c5612c0) at ast_expr2.fl:168
#1  0x080882fb in ast_yyparse (parseio=0x20e040c) at ast_expr2.c:1927
#2  0x0808ab77 in ast_expr (expr=0x20e0450 "\"27543312439\"=\"NULL\"", buf=0x20e24f4 "", length=4091, chan=0x248033a4) at ast_expr2.fl:267
#3  0x081b3fbd in pbx_substitute_variables_helper_full (c=0x248033a4, headp=0x248038e8, cp1=0x20e3500 "$[${LEN(${callerid})}=0] | $[\"${callerid}\"=\"NULL\"]", cp2=0x20e24f4 "", count=4091, used=0x20e454c)
    at pbx_variables.c:774
#4  0x081b3f9d in pbx_substitute_variables_helper_full (c=0x248033a4, headp=0x248038e8, cp1=0x20e4600 "$[$[${LEN(${callerid})}=0] | $[\"${callerid}\"=\"NULL\"]]?SET(callerid=${EXT})", cp2=0x20e4698 "", 
    count=8191, used=0x20e45a0) at pbx_variables.c:768
#5  0x081b4222 in pbx_substitute_variables_helper (c=0x248033a4, cp1=0x20e4600 "$[$[${LEN(${callerid})}=0] | $[\"${callerid}\"=\"NULL\"]]?SET(callerid=${EXT})", cp2=0x20e4698 "", count=8191)
    at pbx_variables.c:790
#6  0x081a4093 in pbx_extension_helper (c=0x248033a4, con=0x0, context=0x24803a2c "macro-set-outcallerid", exten=0x24803a7c "s", priority=6, label=0x0, callerid=0xb3eccba8 "8104", action=E_SPAWN, 
    found=0x20e71d0, combined_find_spawn=1) at pbx.c:2823
#7  0x006fd80b in _macro_exec (chan=0x248033a4, data=0x20e72c8 "set-outcallerid", exclusive=0) at app_macro.c:417
#8  0x081aa380 in pbx_exec (c=0x248033a4, app=0xb696c358, data=0x20e72c8 "set-outcallerid") at pbx_app.c:485
#9  0x081a4106 in pbx_extension_helper (c=0x248033a4, con=0x0, context=0x24803a2c "macro-set-outcallerid", exten=0x24803a7c "s", priority=2, label=0x0, callerid=0xb3eccba8 "8104", action=E_SPAWN, 
    found=0x20e9e30, combined_find_spawn=1) at pbx.c:2834
#10 0x006fd80b in _macro_exec (chan=0x248033a4, data=0x20e9f68 "trunk,IAX2/bitco-barred,0842009361,IAX2/bitco-barred,0842009361", exclusive=0) at app_macro.c:417
#11 0x081aa380 in pbx_exec (c=0x248033a4, app=0xb696c358, data=0x20e9f68 "trunk,IAX2/bitco-barred,0842009361,IAX2/bitco-barred,0842009361") at pbx_app.c:485
#12 0x081a4106 in pbx_extension_helper (c=0x248033a4, con=0x0, context=0x24803a2c "macro-set-outcallerid", exten=0x24803a7c "s", priority=3, label=0x0, callerid=0xb3eccba8 "8104", action=E_SPAWN, 
    found=0x20ec2e8, combined_find_spawn=1) at pbx.c:2834
#13 0x081a5777 in ast_spawn_extension (c=0x248033a4, args=0x0) at pbx.c:4060
#14 __ast_pbx_run (c=0x248033a4, args=0x0) at pbx.c:4235
#15 0x081a7af0 in pbx_thread (data=0x248033a4) at pbx.c:4555
#16 0x0821696b in dummy_start (data=0xa79d92e0) at utils.c:1235
#17 0x005c4912 in start_thread () from /lib/libpthread.so.0
#18 0x002384ae in clone () from /lib/libc.so.6