FileNotFoundError for lock file with tmpdir for old pytest-of-user root

With an existing /tmp/pytest-of-user directory there will be an error now:

___ ERROR at setup of TestGeneralUsage.test_config_error ___

self = <CallInfo when='setup' exception: [Errno 2] No such file or directory: '/tmp/pytest-of-daniel/pytest-current/.lock'>, func = <function call_runtest_hook.<locals>.<lambda> at 0x7f88d52cc0d0>, when = 'setup'
treat_keyboard_interrupt_as_exception = False

    def __init__(self, func, when, treat_keyboard_interrupt_as_exception=False):
        #: context of invocation: one of "setup", "call",
        #: "teardown", "memocollect"
        self.when = when
        self.start = time()
        try:
>           self.result = func()

src/_pytest/runner.py:201: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
src/_pytest/runner.py:183: in <lambda>
    lambda: ihook(item=item, **kwds),
.venv/lib/python3.6/site-packages/pluggy/hooks.py:258: in __call__
    return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
.venv/lib/python3.6/site-packages/pluggy/manager.py:67: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
.venv/lib/python3.6/site-packages/pluggy/manager.py:61: in <lambda>
    firstresult=hook.spec_opts.get('firstresult'),
src/_pytest/runner.py:104: in pytest_runtest_setup
    item.session._setupstate.prepare(item)
src/_pytest/runner.py:370: in prepare
    col.setup()
src/_pytest/python.py:1439: in setup
    fixtures.fillfixtures(self)
src/_pytest/fixtures.py:294: in fillfixtures
    request._fillfixtures()
src/_pytest/fixtures.py:467: in _fillfixtures
    item.funcargs[argname] = self.getfixturevalue(argname)
src/_pytest/fixtures.py:514: in getfixturevalue
    return self._get_active_fixturedef(argname).cached_result[0]
src/_pytest/fixtures.py:537: in _get_active_fixturedef
    self._compute_fixture_value(fixturedef)
src/_pytest/fixtures.py:623: in _compute_fixture_value
    fixturedef.execute(request=subrequest)
src/_pytest/fixtures.py:919: in execute
    return hook.pytest_fixture_setup(fixturedef=self, request=request)
.venv/lib/python3.6/site-packages/pluggy/hooks.py:258: in __call__
    return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
.venv/lib/python3.6/site-packages/pluggy/manager.py:67: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
.venv/lib/python3.6/site-packages/pluggy/manager.py:61: in <lambda>
    firstresult=hook.spec_opts.get('firstresult'),
src/_pytest/fixtures.py:961: in pytest_fixture_setup
    result = call_fixture_func(fixturefunc, request, kwargs)
src/_pytest/fixtures.py:820: in call_fixture_func
    res = fixturefunc(**kwargs)
src/_pytest/pytester.py:371: in testdir
    return Testdir(request, tmpdir_factory)
src/_pytest/pytester.py:498: in __init__
    self.tmpdir = tmpdir_factory.mktemp(name, numbered=True)
src/_pytest/tmpdir.py:103: in mktemp
    return py.path.local(self._tmppath_factory.mktemp(basename, numbered).resolve())
src/_pytest/tmpdir.py:47: in mktemp
    p = make_numbered_dir(root=self.getbasetemp(), prefix=basename)
src/_pytest/tmpdir.py:66: in getbasetemp
    prefix="pytest-", root=rootdir, keep=3, lock_timeout=LOCK_TIMEOUT
src/_pytest/pathlib.py:233: in make_numbered_dir_with_cleanup
    consider_lock_dead_if_created_before=consider_lock_dead_if_created_before,
src/_pytest/pathlib.py:212: in cleanup_numbered_dir
    try_cleanup(path, consider_lock_dead_if_created_before)
src/_pytest/pathlib.py:194: in try_cleanup
    delete_a_numbered_dir(path)
src/_pytest/pathlib.py:166: in delete_a_numbered_dir
    create_cleanup_lock(path)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

p = PosixPath('/tmp/pytest-of-user/pytest-current')

    def create_cleanup_lock(p):
        """crates a lock to prevent premature folder cleanup"""
        lock_path = get_lock_path(p)
        try:
>           fd = os.open(str(lock_path), os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o644)
E           FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pytest-of-user/pytest-current/.lock'

src/_pytest/pathlib.py:127: FileNotFoundError
============================================================================================== short test summary info ==============================================================================================
ERROR testing/acceptance_test.py::TestGeneralUsage::()::test_config_error
============================================================================================== 1 error in 0.32 seconds ==============================================================================================
―

This is due to recent changes, but have not bisected it.

[blueyed]

rm -rf /tmp/pytest-of-user fixes it as a workaround.

[RonnyPfannschmidt]

bugfix pending - thanks for catching and reporting so swiftly ^^