Remove lock -- file names are unique and lock should not be needed

from pathlib import Path

from subprocess import STDOUT, CalledProcessError, TimeoutExpired, run

from typing import Optional, Union

import threading

lock = threading.Lock() # Lock for fer bitstreams

logger = logging.getLogger(__name__)

USE_LOGGER_FOR_DBG = False  # current tests do not make use of the logger feature

                str(input_bitstream_path) + eid_output_suffix,

            ]

            # If the same bitstream is combined with the same error patterns multiple times, 

            # the following section may create a race condition. Hence, it is guarded by a 

            # lock and the file is only created if it does not exist already.

            lock.acquire()

            try:

                if not os.path.exists(str(input_bitstream_path) + eid_output_suffix):

                    result = run(eid_command, check=True)

                print(result.stderr)

                print(result.stdout)

                pytest.fail(f"eid-xor operation failed!")

            lock.release()

            input_bitstream_path += eid_output_suffix