(gdb) bt
#0  0x002145c1 in vsnprintf () from /lib/libc.so.6
#1  0x080f683d in ast_build_string_va (buffer=0xbfaae9b8, space=0xbfaae9b4, 
    fmt=0x162030 "SELECT cat_metric, category, var_name, var_val FROM %s ", 
    ap=0xbfaae40c "\f\004=\025\b\030yS\tH䪿�W\017\b\004=\025\b") at utils.c:659
#2  0x080f68b9 in ast_build_string (buffer=0xbfaae9b8, space=0xbfaae9b4, 
    fmt=0x162030 "SELECT cat_metric, category, var_name, var_val FROM %s ") at utils.c:677
#3  0x0016195d in config_odbc (database=0xbfaaef0c "asterisk", table=0xbfaaee0c "ast_config", 
    file=0xbc7be9 "dundi.conf", cfg=0x95c7f28, withcomments=0) at res_config_odbc.c:505
#4  0x080906c5 in ast_config_internal_load (filename=0xbc7be9 "dundi.conf", cfg=0x95c7f28, withcomments=0)
    at config.c:1268
#5  0x08090736 in ast_config_load (filename=0xbc7be9 "dundi.conf") at config.c:1287
#6  0x00bc19bf in set_config (config_file=0xbc7be9 "dundi.conf", sin=0xbfaaf968) at pbx_dundi.c:4323
#7  0x00bc2601 in load_module () at pbx_dundi.c:4500
#8  0x080a95dc in load_resource (resource_name=0x9531d10 "pbx_dundi.so", global_symbols_only=0) at loader.c:637
#9  0x080a9dfe in load_modules (preload_only=0) at loader.c:822
#10 0x08070432 in main (argc=3, argv=0xbfab00f4) at asterisk.c:2908
#11 0x001ccf2c in __libc_start_main () from /lib/libc.so.6
#12 0x080579f1 in free ()