'Tests parametrized with empty ids cause an internal error (#1849).'

def test_parametrized_empty_ids(self, testdir):

    testdir.makepyfile("\n                                                import    pytest\n\n                                                @pytest.mark.parametrize('temp',    [],    ids=list())\n                                                def    test_temp(temp):\n                                                                    pass\n                                ")
    result = testdir.runpytest()
    result.stdout.fnmatch_lines(['*    1    skipped    *'])
