../../../../ext/cbson/cbson.c: In function ‘write_element’:
../../../../ext/cbson/cbson.c:179:31: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result]
 #define INT2STRING(buffer, i) asprintf(buffer, "%d", i);
                               ^
../../../../ext/cbson/cbson.c:401:17: note: in expansion of macro ‘INT2STRING’
                 INT2STRING(&name, i);
                 ^