Pytest function "pytest_pyfunc_call()" throws "KeyError" when executed the test in parallel mode

[umasenthil]

Error during parallel execution: (I ran the command : python3 -m pytest tests/statistics)
Error:
pyfuncitem = <Function 'test_coxph'>

@hookimpl(trylast=True)
def pytest_pyfunc_call(pyfuncitem):
testfunction = pyfuncitem.obj
if pyfuncitem._isyieldedfunction():
testfunction(*pyfuncitem._args)
else:
funcargs = pyfuncitem.funcargs
testargs = {}
for arg in pyfuncitem._fixtureinfo.argnames:
testargs[arg] = funcargs[arg]
E KeyError: 'flchain'

../../mypythonenv/lib/python3.6/site-packages/_pytest/python.py:154: KeyError

It works if I run the same test sequentially

The pytest hook that I have in conftest.py for parallel exection:

def pytest_collection_modifyitems(items):
    numrepeats = 2
    items.extend(items * (numrepeats -1))

Environment:
apipkg (1.4)
asn1crypto (0.24.0)
attrs (17.4.0)
bcrypt (3.1.4)
boto3 (1.6.11)
botocore (1.9.11)
certifi (2018.1.18)
cffi (1.11.5)
chardet (3.0.4)
cryptography (2.1.4)
docutils (0.14)
execnet (1.5.0)
idna (2.6)
jmespath (0.9.3)
jproperties3 (0.5.2)
numpy (1.14.1)
pandas (0.22.0)
paramiko (2.4.1)
pbr (4.0.2)
pip (9.0.1)
pluggy (0.6.0)
psutil (5.4.3)
py (1.5.2)
pyasn1 (0.4.2)
pycparser (2.18)
PyNaCl (1.2.1)
pytest (3.4.2)
pytest-concurrent (0.1.2)
pytest-forked (0.2)
pytest-xdist (1.22.2)
python-dateutil (2.6.1)
pytz (2018.3)
requests (2.18.4)
s3transfer (0.1.13)
setuptools (38.5.2)
six (1.11.0)
SQLAlchemy (1.2.5)
sqlalchemy-teradata (0.0.9.dev0)
stevedore (1.28.0)
tdtestpy (0.1.3)
tdutils (0.0.0)
teradata (15.10.0.21)
urllib3 (1.22)
virtualenv (15.2.0)
virtualenv-clone (0.3.0)
virtualenvwrapper (4.8.2)

[pytestbot]

GitMate.io thinks possibly related issues are #231 (Duplicate function "pytest_pyfunc_call"), #3128 (pytest.main function gives an error when tested module is in the PYTHONPATH), #1563 (All pytest tests skipped), #2137 (pytest --pdb execute test cases which otherwise are skipped), and #342 (pytest is identifying a function as a test case that shouldn't be).

[RonnyPfannschmidt]

please format your code listings as code and shoiw waht you run, also your conftests might be of help

[Zac-HD]

Closing because there is no reproducible example of the problem.