Valgrind报告getaddrinfo上的内存泄漏

Question

我已经将代码精简到最低限度，尽管将servinfo设置为NULL并过多地调用了freeaddrinfo，但我仍然看到valgrind --leak-check = yes发生内存泄漏。 我找到了该线程，但无法解决问题。

这是代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netdb.h>

int main() {
  /* Declare connection variables */
  struct addrinfo hints, *servinfo;
  char port[6];
  servinfo = NULL;

  /* Set address attributes */
  memset(&hints, 0, sizeof hints);
  hints.ai_family = AF_UNSPEC;
  hints.ai_socktype = SOCK_STREAM;
  sprintf(port, "%d", 8888);
  if (getaddrinfo(NULL, port, &hints, &servinfo) != 0) {
    freeaddrinfo(servinfo);
    fprintf(stderr, "> Error: getaddrinfo() failed.\n");
    exit(EXIT_FAILURE);
  }
  freeaddrinfo(servinfo);

  return 0;
}

这是valgrind输出：

==5199== 640 (320 direct, 320 indirect) bytes in 1 blocks are definitely lost in loss record 104 of 122
==5199==    at 0x100007351: malloc (vg_replace_malloc.c:303)
==5199==    by 0x10038EA3D: sa_dst_lookup (in /usr/lib/system/libsystem_network.dylib)
==5199==    by 0x10038E1F6: sa_dst_compare_internal (in /usr/lib/system/libsystem_network.dylib)
==5199==    by 0x1002144DE: _qsort (in /usr/lib/system/libsystem_c.dylib)
==5199==    by 0x1002B5F68: _gai_sort_list (in /usr/lib/system/libsystem_info.dylib)
==5199==    by 0x1002ADD30: si_addrinfo (in /usr/lib/system/libsystem_info.dylib)
==5199==    by 0x1002AD966: getaddrinfo (in /usr/lib/system/libsystem_info.dylib)
==5199==    by 0x100000EBC: main (test.c:19)

有任何想法吗？ 可能是OS X Yosemite问题吗？ 谢谢你的帮助...