`params` on Fixtures are silently hidden when the Fixture is shadowed but used

[jgersti]

Issue

params on fixtures that are shadowed but used are silently dropped.

Example

@pytest.fixture
def b(a): return a

@pytest.fixture(name="a", params=("inner", "near"))
def a_inner(request):
    return f"#{request.param}"

@pytest.fixture(name="a", params=("outer", "far"))
def a_outer(request, a, b):
    return f"+{request.param} {a} {b}"

def test_nested(a):
    print(a)

this result in something like

> pytest -s -q -vvv
::test_nested[outer]
+outer #outer #outer
PASSED
::test_nested[far]
+far #far #far
PASSED

I expect to atleast get a warning that the params on the inner fixture are overwritten by the paramson the outer one

Note I:

I actually hoped to get all four cases (outer-inner, outer-near, far-inner, far-near), but i guess that wont happen anytime (see Note III)

Note II:

The fixture b is only included to demonstrate that the inner fixture is/can be accessed when necessary.
Increasing the scope on the inner fixture does not change anything.

Note III:

I am aware that the current behaviour (ignoring the params on the inner fixture) is the current way to make indirect parameters in pytest.mark.parametrize work, because pytest.mark.parametrize in effect just shadows fixtures.

Sytem Info:

pytest-7.4.0
win10 & python 3.11

[RonnyPfannschmidt]

Params are by name ,not by fixture definition

[jgersti]

Params are by name ,not by fixture definition

I was aware, this is what i meant by shadowing and why i asked for a warning when there are multiple params for a name detected.