(gdb) bt
#0  0x080cc291 in ast_variable_browse (config=0xfffffffe, category=0x729d4b "&unload_strings)->lock") at config.c:543
#1  0x00727792 in my_load_module (reload=0) at cdr_mysql.c:459
#2  0x007295fc in my_load_module (reload=136193428) at cdr_mysql.c:660
#3  0x081192e8 in start_resource (mod=0x85306a8) at loader.c:785
#4  0x08119be3 in load_resource_list (load_order=0xbf8754e4, global_symbols=0, mod_count=0xbf8754dc) at loader.c:973
#5  0x0811a243 in load_modules (preload_only=0) at loader.c:1126
#6  0x08086162 in main (argc=8, argv=0xbf876a94) at asterisk.c:3827