Latest 5.0 version raises CoverageException: file is not a database

Our coverage report is failing as of this weekend. It’s failing on Python 2 and 3.

Stack trace below. Thanks for the help!

Traceback (most recent call last):
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 1025, in execute
    return self.con.execute(sql, parameters)
sqlite3.DatabaseError: file is not a database

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/bin/pytest", line 8, in <module>
    sys.exit(main())
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/_pytest/config/__init__.py", line 72, in main
    config = _prepareconfig(args, plugins)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/_pytest/config/__init__.py", line 223, in _prepareconfig
    pluginmanager=pluginmanager, args=args
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/manager.py", line 87, in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/callers.py", line 203, in _multicall
    gen.send(outcome)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/_pytest/helpconfig.py", line 89, in pytest_cmdline_parse
    config = outcome.get_result()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/_pytest/config/__init__.py", line 793, in pytest_cmdline_parse
    self.parse(args)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/_pytest/config/__init__.py", line 999, in parse
    self._preparse(args, addopts=addopts)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/_pytest/config/__init__.py", line 957, in _preparse
    early_config=self, args=args, parser=self._parser
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/manager.py", line 87, in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/callers.py", line 208, in _multicall
    return outcome.get_result()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pytest_cov/plugin.py", line 118, in pytest_load_initial_conftests
    plugin = CovPlugin(early_config.known_args_namespace, early_config.pluginmanager)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pytest_cov/plugin.py", line 164, in __init__
    self.start(engine.Central)
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pytest_cov/plugin.py", line 186, in start
    self.cov_controller.start()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/pytest_cov/engine.py", line 187, in start
    self.cov.load()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/control.py", line 387, in load
    self._data.read()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 741, in read
    with self._connect():       # TODO: doesn't look right
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 296, in _connect
    self._open_db()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 264, in _open_db
    self._read_db()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 268, in _read_db
    with self._dbs[get_thread_id()] as db:
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 1008, in __enter__
    self._connect()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 996, in _connect
    self.execute("pragma journal_mode=off").close()
  File "/Users/ellbosch/Repos/mssql-cli/.tox/py37/lib/python3.7/site-packages/coverage/sqldata.py", line 1027, in execute
    raise CoverageException("Couldn't use data file {!r}: {}".format(self.filename, exc))
coverage.misc.CoverageException: Couldn't use data file '/Users/ellbosch/Repos/mssql-cli/.coverage': file is not a database
Command '['pytest', '-l', '--cov', 'mssqlcli', '--doctest-modules', '--junitxml=junit/test-6d62ae30-2031-11ea-80ec-3af9d39e6caa-results.xml', '--cov-report=xml', '--cov-report=html', '--cov-append', '-o', 'junit_suite_name=pytest-3.7.4', '-s', '-m', 'not unstable', 'tests/jsonrpc']' returned non-zero exit status 1.
ERROR: InvocationError for command /Users/ellbosch/Repos/mssql-cli/.tox/py37/bin/python build.py unit_test (exited with code 1)

[willienillie]

I saw a similar issue when running pytest-cov and coverage through tox. It was resolved by pinning coverage to back to 4.5.4.

raise CoverageException("Couldn't use data file {!r}: {}".format(self.filename, exc))
INTERNALERROR> coverage.misc.CoverageException: Couldn't use data file '/my/repo/location/.coverage': Safety level may not be changed inside a transaction

[nedbat]

This is now available in coverage==5.0.1

Please upgrade. If the problem persists, let’s debug why. 😃