[Bug] Coroutine Raised StopIteration when triggering workflow execution from CLI for workflows which call workflow.upsert_search_attributes

[alonwengierko]

What are you really trying to do?

I modified poetry file to use temporalio version 1.4.0 and then ran worker.py of your_visibility folder of the DOCUMENTATION_SAMPLES_PYTHON repository (https://github.com/temporalio/documentation-samples-python)

Then I use cli command to trigger workflow

temporal workflow start --task-queue search-attributes-task-queue --type GreetingWorkflow

After doing that I get an error:
"coroutine raised StopIteration"

This error doesn't happen for version Python SDK 1.3.0 when I trigger workflow from cli

Describe the bug

I found that when you trigger a workflow who has calls to workflow.upsert_search_attributes using cli for for Temporalio Python SDK version 1.4.0, you get error Coroutine Raised StopIteration

File "/Users/awengierko/Documents/Projects/documentation-samples-python/.venv/lib/python3.11/site-packages/temporalio/worker/_workflow_instance.py", line 1888, in execute_workflow
return await input.run_fn(*args)
^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: coroutine raised StopIteration
Failed activation on workflow GreetingWorkflow with ID 9e14f703-b1de-4031-9213-fb43b405a660 and run ID cf74cb1b-0bb2-4d08-a711-312c3f050cfb

Minimal Reproduction

1. Clone repo https://github.com/temporalio/documentation-samples-python
2. Update pyproject.toml to use temporalio = "^1.4.0" instead of temporalio = "^1.3.0"
3. Terminal 1 -> Run worker: python worker.py
4. Terminal 2 -> Trigger Workflow exeuction: temporal workflow start --task-queue search-attributes-task-queue --type GreetingWorkflow
5. See in Terminal 2: Error message "coroutine raised StopIteration"

Environment/Versions

• OS and processor: M2 Mac
• Temporal Version: 1.4.0
• Are you using Docker or Kubernetes or building Temporal from source? No

[cretz]

Thanks! I believe this was just fixed in #440 but not yet released. In the meantime, I recommend using typed search attributes for upsert_search_attributes (you should be getting a warning if you use this deprecated form). I will see if I can have the docs updated to match.

(closing since the primary issue was fixed, but feel free to continue to discuss here, on the forums, or on Slack)