Calling suspend_flow_run raises an exception

[EmilRex]

Bug summary

Calling suspend_flow_run in a flow raises a prefect.exceptions.Pause exception with an associate stack trace. I would expect it to be caught and not generate a stack trace.

Repro

# repro/suspend.py
from prefect import flow, suspend_flow_run


@flow
def suspend():
    suspend_flow_run(timeout=60)


if __name__ == "__main__":
    suspend.serve(name="served")

Log

python repro/suspend.py  
Your flow 'suspend' is being served and polling for scheduled runs!

To trigger a run for this flow, use the following command:

        $ prefect deployment run 'suspend/served'

You can also run your flow via the Prefect UI: https://app.prefect.cloud/account/0ff44498-d380-4d7b-bd68-9b52da03823f/workspace/6bf6d7a9-ab18-4942-9315-349d4f1fef34/deployments/deployment/3757304d-01de-490c-a8f1-6210cf2df8f2

15:52:34.912 | INFO    | prefect.flow_runs.runner - Runner 'served' submitting flow run 'bf5ca198-1ea5-4b7f-a852-770fd817a44a'
15:52:35.041 | INFO    | prefect.flow_runs.runner - Opening process...
15:52:35.064 | INFO    | prefect.flow_runs.runner - Completed submission of flow run 'bf5ca198-1ea5-4b7f-a852-770fd817a44a'
15:52:36.708 | INFO    | Flow run 'abstract-anteater' - Downloading flow code from storage at '.'
15:52:37.139 | INFO    | Flow run 'abstract-anteater' - Beginning flow run 'abstract-anteater' for flow 'suspend'
15:52:37.140 | INFO    | Flow run 'abstract-anteater' - View at https://app.prefect.cloud/account/0ff44498-d380-4d7b-bd68-9b52da03823f/workspace/6bf6d7a9-ab18-4942-9315-349d4f1fef34/runs/flow-run/bf5ca198-1ea5-4b7f-a852-770fd817a44a
15:52:37.156 | INFO    | Flow run 'abstract-anteater' - Suspending flow run, execution will be rescheduled when this flow run is resumed.
15:52:37.348 | ERROR   | Flow run 'abstract-anteater' - Finished in state Running()
15:52:37.349 | ERROR   | Flow run 'abstract-anteater' - Engine execution exited with unexpected exception
Traceback (most recent call last):
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/flow_engine.py", line 1511, in run_flow
    ret_val = run_flow_sync(**kwargs)
              ^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/flow_engine.py", line 1354, in run_flow_sync
    engine.call_flow_fn()
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/flow_engine.py", line 766, in call_flow_fn
    result = call_with_parameters(self.flow.fn, self.parameters)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/utilities/callables.py", line 208, in call_with_parameters
    return fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/repro/suspend.py", line 6, in suspend
    suspend_flow_run(timeout=60)
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 353, in coroutine_wrapper
    return run_coro_as_sync(ctx_call())
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 209, in run_coro_as_sync
    return call.result()
           ^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 330, in result
    return self.future.result(timeout=timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 193, in result
    return self.__get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.12.8/Frameworks/Python.framework/Versions/3.12/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
    raise self._exception
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/_internal/concurrency/calls.py", line 403, in _run_async
    result = await coro
             ^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 190, in coroutine_wrapper
    return await task
           ^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/utilities/asyncutils.py", line 343, in ctx_call
    result = await async_fn(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/client/utilities.py", line 99, in with_injected_client
    return await fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/emilchristensen/github/examples/.venv/lib/python3.12/site-packages/prefect/flow_runs.py", line 429, in suspend_flow_run
    raise Pause()
prefect.exceptions.Pause
15:52:37.356 | INFO    | prefect.engine - Engine execution of flow run 'bf5ca198-1ea5-4b7f-a852-770fd817a44a' is paused:
15:52:37.609 | INFO    | prefect.flow_runs.runner - Process for flow run 'abstract-anteater' exited cleanly.

Version info

Version:             3.1.14
API version:         0.8.4
Python version:      3.12.8
Git commit:          5f1ebb57
Built:               Thu, Jan 23, 2025 1:22 PM
OS/Arch:             darwin/arm64
Profile:             dev
Server type:         cloud
Pydantic version:    2.10.3
Integrations:
  prefect-docker:    0.6.2

Additional context

No response