Test failure - invalid flag in regex options on v5.0.0-alpha0-442-g0520668

 [2021/05/18 21:24:05.547] ERROR [0.020s]: test_find_w_regex (test_collection.TestCollection)

 [2021/05/18 21:24:05.547] ----------------------------------------------------------------------

 [2021/05/18 21:24:05.547] Traceback (most recent call last):

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/test/test_collection.py", line 1186, in test_find_w_regex

 [2021/05/18 21:24:05.547]     re.compile("^hello.*")}))), 4)

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/cursor.py", line 1206, in next

 [2021/05/18 21:24:05.547]     if len(self.__data) or self._refresh():

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/cursor.py", line 1128, in _refresh

 [2021/05/18 21:24:05.547]     self.__send_message(q)

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/cursor.py", line 1005, in __send_message

 [2021/05/18 21:24:05.547]     address=self.__address)

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/mongo_client.py", line 1290, in _run_operation_with_response

 [2021/05/18 21:24:05.547]     exhaust=exhaust)

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/mongo_client.py", line 1389, in _retryable_read

 [2021/05/18 21:24:05.547]     return func(session, server, sock_info, slave_ok)

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/mongo_client.py", line 1284, in _cmd

 [2021/05/18 21:24:05.547]     unpack_res)

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/server.py", line 135, in run_operation_with_response

 [2021/05/18 21:24:05.547]     _check_command_response(first, sock_info.max_wire_version)

 [2021/05/18 21:24:05.547]   File "/data/mci/1d200dc14af5f5a20fe7deb6d64e91c3/src/pymongo/helpers.py", line 167, in _check_command_response

 [2021/05/18 21:24:05.547]     raise OperationFailure(errmsg, code, response, max_wire_version)

 [2021/05/18 21:24:05.547] pymongo.errors.OperationFailure:  invalid flag in regex options: u, full error: {'ok': 0.0, 'errmsg': ' invalid flag in regex options: u', 'code': 51108, 'codeName': 'Location51108'}

 [2021/05/18 21:20:13.551] db version v5.0.0-alpha0-442-g0520668

 [2021/05/18 21:20:13.551] Build Info: {

 [2021/05/18 21:20:13.551]     "version": "5.0.0-alpha0-442-g0520668",

 [2021/05/18 21:20:13.551]     "gitVersion": "052066841c3dcee7776ee73a0c3145fea1ece4fd",

 [2021/05/18 21:20:13.551]     "openSSLVersion": "OpenSSL 1.0.2k-fips  26 Jan 2017",

 [2021/05/18 21:20:13.551]     "modules": [

 [2021/05/18 21:20:13.551]         "enterprise"

 [2021/05/18 21:20:13.551]     ],

 [2021/05/18 21:20:13.551]     "allocator": "tcmalloc",

 [2021/05/18 21:20:13.551]     "environment": {

 [2021/05/18 21:20:13.551]         "distmod": "amzn64",

 [2021/05/18 21:20:13.551]         "distarch": "x86_64",

 [2021/05/18 21:20:13.551]         "target_arch": "x86_64"

 [2021/05/18 21:20:13.551]     }

 [2021/05/18 21:20:13.551] }