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UnboundLocalError after receiving ZMQ corrupted message

See original GitHub issue

PR 2120 introduced problem with wrong handling of ZMQ corrupted message what leads to: UnboundLocalError: local variable ‘client_id’ referenced before assignment.

locust-master: 2022-11-11T07:03:39.637+0000 |CRITICAL|locust.runners           |  Unhandled exception in greenlet: <Greenlet at 0x7fab1317dae0: <bound method MasterRunner.client_listener of <locust.runners.MasterRunner object at 0x7fab0767d580>>>
locust-master: Traceback (most recent call last):
locust-master: File "/root/.local/share/virtualenvs/locust-1T7N9san/lib/python3.9/site-packages/locust/rpc/zmqrpc.py", line 44, in recv_from_client
locust-master: addr = data[0].decode()
locust-master: UnicodeDecodeError: 'utf-8' codec can't decode byte 0x86 in position 9: invalid start byte
locust-master: The above exception was the direct cause of the following exception:
locust-master: Traceback (most recent call last):
locust-master: File "/root/.local/share/virtualenvs/locust-1T7N9san/lib/python3.9/site-packages/locust/runners.py", line 960, in client_listener
locust-master: client_id, msg = self.server.recv_from_client()
locust-master: File "/root/.local/share/virtualenvs/locust-1T7N9san/lib/python3.9/site-packages/locust/rpc/zmqrpc.py", line 46, in recv_from_client
locust-master: raise RPCReceiveError("ZMQ interrupted or corrupted message") from e
locust-master: locust.exception.RPCReceiveError: ZMQ interrupted or corrupted message
locust-master: During handling of the above exception, another exception occurred:
locust-master: Traceback (most recent call last):
locust-master: File "src/gevent/greenlet.py", line 906, in gevent._gevent_cgreenlet.Greenlet.run
locust-master: File "/root/.local/share/virtualenvs/locust-1T7N9san/lib/python3.9/site-packages/locust/runners.py", line 962, in client_listener
locust-master: logger.error(f"RPCError when receiving from client: {e}. Will reset client {client_id}.")
locust-master: UnboundLocalError: local variable 'client_id' referenced before assignment
locust-master: <gevent._socket3.socket at 0x7fab12f7ac40 object, fd=19, family=2, type=1, proto=0>: Expected GET method: '\x16\x03\x01\x010\x01\x00\x01,\x03\x03\x9a.2ã*:ª\x86\x94\x91}Mbv1\x18¶\xa0HC\x80÷väRòM\x08&û!¯\x00\x00¬À0À,À(À$À\x14À\n

Locust: 2.10.1 Python: 3.9 OS: CentOS