MDEV-10559: main.mysql_client_test_nonblock crashes in buildbot on 10.0

fix for async operations

sql-common/client.c

@@ -3644,7 +3644,8 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
     /* Free alloced memory */
     end_server(mysql);
     mysql_close_free(mysql);
-    if (!(client_flag & CLIENT_REMEMBER_OPTIONS))
+    if (!(client_flag & CLIENT_REMEMBER_OPTIONS) &&
+        !mysql->options.extension->async_context)
       mysql_close_free_options(mysql);
   }
   DBUG_RETURN(0);

sql-common/mysql_async.c

@@ -455,7 +455,11 @@ MK_ASYNC_START_BODY(
     parms.db= db;
     parms.port= port;
     parms.unix_socket= unix_socket;
-    parms.client_flags= client_flags;
+    /*
+      async wrapper enforce the CLIENT_REMEMBER_OPTIONS flag to be
+      functional (otherwise it can't operate)
+    */
+    parms.client_flags= client_flags | CLIENT_REMEMBER_OPTIONS;
   },
   NULL,
   r_ptr,

tests/mysql_client_test.c

@@ -18443,7 +18443,7 @@ static void test_bug58036()
 
   if (mysql_real_connect(conn, opt_host, opt_user,
                          opt_password,  opt_db ? opt_db : "test",
-                         opt_port, opt_unix_socket, CLIENT_REMEMBER_OPTIONS))
+                         opt_port, opt_unix_socket, 0))
   {
     if (!opt_silent)
       printf("mysql_real_connect() succeeded (failure expected)\n");
@@ -18469,7 +18469,7 @@ static void test_bug58036()
   mysql_options(conn, MYSQL_SET_CHARSET_NAME, "latin1");
   if (!mysql_real_connect(conn, opt_host, opt_user,
                          opt_password, opt_db ? opt_db : "test",
-                         opt_port, opt_unix_socket, CLIENT_REMEMBER_OPTIONS))
+                         opt_port, opt_unix_socket, 0))
   {
     if (!opt_silent)
       printf("mysql_real_connect() failed: %s (%d)\n",
@@ -19344,7 +19344,7 @@ static void test_big_packet()
 
   if (!(mysql_real_connect(mysql_local, opt_host, opt_user,
                            opt_password, current_db, opt_port,
-                           opt_unix_socket, CLIENT_REMEMBER_OPTIONS)))
+                           opt_unix_socket, 0)))
   {
     mysql_close(mysql_local);
     fprintf(stderr, "\n connection failed(%s)", mysql_error(mysql_local));