def test_invalid_cmd(self):
        with phlsys_fs.nostd() as stderr:
            self.assertRaises(OSError, phlsys_subprocess.run, "invalidcmd")
            self.assertTrue("OSError" in stderr.out)
Construct an empty lineage if prior_lineage is None or if its not use it as the list of
dataset/ETHPy150Open bloomberg/phabricator-tools/py/phl/phlsys_subprocess__t.py/PhlsysSubprocessTests.test_invalid_cmd--crossover with--dataset/ETHPy150Open EntilZha/PyFunctional/functional/lineage.py/Lineage.__init__