[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] }