GRANT_NAME **first= NULL, *UNINIT_VAR(merged);

  ulong UNINIT_VAR(privs);

  for (GRANT_NAME **cur= grants.front(); cur <= grants.back(); cur++)

  {

   ACL_DB **first= NULL, *UNINIT_VAR(merged);

  ulong UNINIT_VAR(access), update_flags= 0;

  for (ACL_DB **cur= dbs.front(); cur <= dbs.back(); cur++)

  {

    if (!first || (!dbname && strcmp(cur[0]->db, cur[-1]->db)))

    { // new db name series 

      update_flags|= *update_role_db*(merged, first, access, grantee->user.str);

      merged= NULL;

      access= 0;

      first= cur;

    }

    if (strcmp(cur[0]->user, grantee->user.str) == 0)   *# SEGFAULT*

      access|= (merged= cur[0])->initial_access;

    else

      access|= cur[0]->access;

  }

Thread pointer: 0x7f3ea83a8008

Attempting backtrace. You can use the following information to find out

where mysqld died. If you see no messages after this, something went

terribly wrong...

stack_bottom = 0x7f3e9d517110 thread_stack 0x48400

mysys/stacktrace.c:268(my_print_stacktrace)[0x555a1a1bdd4b]

sql/signal_handler.cc:168(handle_fatal_signal)[0x555a19d1a485]

/lib64/libpthread.so.0(+0x3639a0f7e0)[0x7f43230827e0]

/lib64/libc.so.6(+0x3638f28696)[0x7f43219e8696]

sql/sql_acl.cc:5317(merge_role_db_privileges)[0x555a19b42e9b]

sql/sql_acl.cc:5081(traverse_role_graph_impl)[0x555a19b35bab]

sql/sql_acl.cc:6779(propagate_role_grants_action)[0x555a19b35de4]

mysys/hash.c:769(my_hash_iterate)[0x555a1a19fd6c]

sql/sql_acl.cc:6845(grant_reload(THD*))[0x555a19b44dbc]

sql/sql_reload.cc:86(reload_acl_and_cache(THD*, unsigned long long, TABLE_LIST*, int*))[0x555a19c851ce]

sql/sql_parse.cc:4885(mysql_execute_command(THD*))[0x555a19b9e7e3]

sql/sql_parse.cc:7466(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x555a19ba6405]

sql/sql_parse.cc:1582(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x555a19ba9015]

sql/sql_parse.cc:1126(do_command(THD*))[0x555a19ba9687]

sql/sql_connect.cc:1330(do_handle_one_connection(THD*))[0x555a19c6b99f]

sql/sql_connect.cc:1244(handle_one_connection)[0x555a19c6bad7]

perfschema/pfs.cc:1864(pfs_spawn_thread)[0x555a19e8bb8d]

/lib64/libpthread.so.0(+0x3639a07aa1)[0x7f432307aaa1]

/lib64/libc.so.6(clone+0x6d)[0x7f43219a8bdd]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x7f3eac4364e5): FLUSH PRIVILEGES

Connection ID (thread ID): 3

Status: NOT_KILLED