All tests are run when only last failed tests are requested

Observed behavior:

When I run pytest -s --lf --lfnf=none tests and all the tests that failed during the previous run of the test suite where removed, all the tests are run.

Expected behavior:

I would expect that no tests are run at all in the above-mentioned situation, because the user explicitly requested to only run the tests that failed previously. Given that there are none, no tests should run.

Minimal reproduction:

Step 1: Run pytest tests with the following tests/test_test.py file:

def test_test1():
    raise Exception()
 
def test_test2():
    return

This produces the following output:

Test session starts (platform: linux, Python 3.12.11, pytest 8.4.1, pytest-sugar 1.0.0)
Using --randomly-seed=533107519
rootdir: /tmp/test
configfile: pyproject.toml
plugins: time-machine-2.16.0, env-1.1.5, cov-6.2.1, instafail-0.5.0, sugar-1.0.0, timeout-2.4.0, randomly-3.16.0, postgresql-7.0.2, asyncio-1.1.0, logfire-4.0.0
asyncio: mode=Mode.AUTO, asyncio_default_fixture_loop_scope=None, asyncio_default_test_loop_scope=function
collected 2 items                                                                                                                                                     


――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――― test_test1 ――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――

    def test_test1():
>       raise Exception()
E       Exception

tests/test_test.py:2: Exception

 tests/test_test.py ⨯✓                                                                                                                                  100% ██████████
======================================================================= short test summary info =======================================================================
FAILED tests/test_test.py::test_test1 - Exception

Results (0.06s):
       1 passed
       1 failed
         - tests/test_test.py:1 test_test1

Step 2: Run pytest --lf --lfnf=none tests with the following tests/test_test.py file (remove test1):

def test_test2():
    return

This produces the following output:

Test session starts (platform: linux, Python 3.12.11, pytest 8.4.1, pytest-sugar 1.0.0)
Using --randomly-seed=304109397
rootdir: /tmp/test
configfile: pyproject.toml
plugins: time-machine-2.16.0, env-1.1.5, cov-6.2.1, instafail-0.5.0, sugar-1.0.0, timeout-2.4.0, randomly-3.16.0, postgresql-7.0.2, asyncio-1.1.0, logfire-4.0.0
asyncio: mode=Mode.AUTO, asyncio_default_fixture_loop_scope=None, asyncio_default_test_loop_scope=function
collected 1 item                                                                                                                                                      
run-last-failure: 1 known failures not in selected tests

 tests/test_test.py ✓                                                                                                                                   100% ██████████

Results (0.02s):
       1 passed

Software versions:

• The above-mentioned issue happens on pytest==8.4.1

Reproduce the two-step case with tests/test_test.py using pytest tests and then pytest --lf --lfnf=none tests. Start from the run-last-failure behavior shown in the output; done means the second command selects and runs no tests when its previous failures are absent.