The merged simulation API deploy for PolicyEngine 4.12 failed beta integration tests because the Modal simulation worker image cannot import the packaged simulation helpers at container startup.
Failed deploy:
Observed failures:
test_calculate_specific_modeltest_budget_window_multi_year_batch_completes
Modal staging worker logs for policyengine-simulation-py4-12-0 show both run_simulation and run_budget_window_batch crash-looping before user code executes:
ModuleNotFoundError: No module named 'fastapi'
The import chain is:
/root/app.py
from policyengine_api_simulation.release_bundle import get_bundled_country_model_version
/root/policyengine_api_simulation/__init__.py
from fastapi import FastAPI
The worker image explicitly installs the PolicyEngine runtime dependencies, tables, and logfire, but not fastapi, so importing any policyengine_api_simulation.* submodule triggers package __init__ and crashes the worker container.
The merged simulation API deploy for PolicyEngine 4.12 failed beta integration tests because the Modal simulation worker image cannot import the packaged simulation helpers at container startup.
Failed deploy:
Observed failures:
test_calculate_specific_modeltest_budget_window_multi_year_batch_completesModal staging worker logs for
policyengine-simulation-py4-12-0show bothrun_simulationandrun_budget_window_batchcrash-looping before user code executes:The import chain is:
The worker image explicitly installs the PolicyEngine runtime dependencies,
tables, andlogfire, but notfastapi, so importing anypolicyengine_api_simulation.*submodule triggers package__init__and crashes the worker container.