RuntimeError: deque mutated during iteration
 
 Traceback (most recent call last):
 File "/workspace/main.py", line 197, in get_status
 return get_with_retry_5s(url, c)
 ~~~~~~~~~~~~^^^^^^^^^
 File "/workspace/main.py", line 616, in uaflifo_main
 inb_status, _, _ = get_flifo_data(new_args, c=c)
 ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
 File "/workspace/main.py", line 223, in get_flifo_data
 fs_response = get_flight_status(args, c)
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/backoff/_sync.py", line 105, in retry
 ret = target(*args, **kwargs)
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/backoff/_sync.py", line 48, in retry
 ret = target(*args, **kwargs)
 File "/workspace/mb_httpx.py", line 213, in get_with_retry_5s
 return c.get(
 ~~~~~^
 url,
 ^^^^
 ...<6 lines>...
 extensions=extensions,
 ^^^^^^^^^^^^^^^^^^^^^^
 )
 ^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpx/_client.py", line 1053, in get
 return self.request(
 ~~~~~~~~~~~~^
 "GET",
 ^^^^^^
 ...<7 lines>...
 extensions=extensions,
 ^^^^^^^^^^^^^^^^^^^^^^
 )
 ^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpx/_client.py", line 825, in request
 return self.send(request, auth=auth, follow_redirects=follow_redirects)
 ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpx/_client.py", line 914, in send
 response = self._send_handling_auth(
 request,
 ...<2 lines>...
 history=[],
 )
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpx/_client.py", line 942, in _send_handling_auth
 response = self._send_handling_redirects(
 request,
 follow_redirects=follow_redirects,
 history=history,
 )
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpx/_client.py", line 979, in _send_handling_redirects
 response = self._send_single_request(request)
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpx/_client.py", line 1014, in _send_single_request
 response = transport.handle_request(request)
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpx/_transports/default.py", line 250, in handle_request
 resp = self._pool.handle_request(req)
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpcore/_sync/connection_pool.py", line 256, in handle_request
 raise exc from None
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpcore/_sync/connection_pool.py", line 236, in handle_request
 response = connection.handle_request(
 pool_request.request
 )
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpcore/_sync/connection.py", line 103, in handle_request
 return self._connection.handle_request(request)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpcore/_sync/http2.py", line 187, in handle_request
 raise exc
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpcore/_sync/http2.py", line 144, in handle_request
 self._send_request_headers(request=request, stream_id=stream_id)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/httpcore/_sync/http2.py", line 249, in _send_request_headers
 self._h2_state.send_headers(stream_id, headers, end_stream=end_stream)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/h2/connection.py", line 806, in send_headers
 frames.extend(stream.send_headers(
 ~~~~~~~~~~~~~~~~~~~^
 headers, self.encoder, end_stream,
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ))
 ^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/h2/stream.py", line 894, in send_headers
 frames = self._build_headers_frames(
 bytes_headers, encoder, hf, hdr_validation_flags,
 )
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/h2/stream.py", line 1298, in _build_headers_frames
 encoded_headers = encoder.encode(headers)
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/hpack/hpack.py", line 276, in encode
 header_block.append(self.add(new_header, sensitive, huffman))
 ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/hpack/hpack.py", line 301, in add
 match = self.header_table.search(name, value)
 File "/layers/google.python.pip/pip/lib/python3.13/site-packages/hpack/table.py", line 186, in search
 for (i, (n, v)) in enumerate(self.dynamic_entries):
 ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^

@backoff.on_exception(
 wait_gen=backoff.expo,
 exception=httpx.HTTPError,
 max_time=5,
 on_backoff=log_backoff,
)
@backoff.on_predicate(
 wait_gen=backoff.expo,
 predicate=lambda x: x.status_code in {408, 429, 500, 502, 503, 504},
 max_time=5,
 on_backoff=log_backoff,
)
def get_with_retry_5s(
 url: httpx._types.URLTypes,
 c: httpx.Client = default_client,
 *,
 params: httpx._types.QueryParamTypes | None = None,
 headers: httpx._types.HeaderTypes | None = None,
 cookies: httpx._types.CookieTypes | None = None,
 auth: httpx._types.AuthTypes | httpx._client.UseClientDefault = httpx._client.USE_CLIENT_DEFAULT,
 follow_redirects: bool | httpx._client.UseClientDefault = httpx._client.USE_CLIENT_DEFAULT,
 timeout: httpx._types.TimeoutTypes | httpx._client.UseClientDefault = httpx._client.USE_CLIENT_DEFAULT,
 extensions: httpx._types.RequestExtensions | None = None,
) -> httpx.Response:
 """
 Get url, retrying for up to 5 seconds with truncated exponential backoff if an HTTPError is encountered or
 any of the following response status codes is returned:
 * 408 Request Timeout
 * 429 Too Many Requests
 * 500 Internal Server Error
 * 502 Bad Gateway
 * 503 Service Unavailable
 * 504 Gateway Timeout
 """
 timeout = timeout or 5
 return c.get(
 url,
 params=params,
 headers=headers,
 cookies=cookies,
 auth=auth,
 follow_redirects=follow_redirects,
 timeout=timeout,
 extensions=extensions,
 )