fix bug

src/client/src/tscSystem.c

@@ -84,6 +84,8 @@ int32_t tscInitRpc(const char *user, const char *secretEncrypt, void **pDnodeCon
 void taos_init_imp(void) {
   char temp[128]  = {0};
   
+  tdminit();
+
   errno = TSDB_CODE_SUCCESS;
   srand(taosGetTimestampSec());
   deltaToUtcInitOnce();

src/client/src/tscUtil.c

@@ -503,6 +503,8 @@ void tscFreeSqlObj(SSqlObj* pSql) {
   pCmd->allocSize = 0;
   
   tsem_destroy(&pSql->rspSem);
+
+  memset(pSql, 0, sizeof(*pSql));
   TDMFREE(pSql);
 }