#define os_calloc(__cnt, __size) ({ \
void *ptr = NULL; \
size_t _size = (__size); \
- size_t _cnt = (__size); \
+ size_t _cnt = (__cnt); \
if ((__builtin_constant_p(__cnt) && __builtin_constant_p(__size)) || \
!_dispatch_is_multithreaded()) { \
ptr = _os_calloc_known(_cnt, _size); \