Retrieve a value after the yield statement from a fixture

[TheoCrd]

I have a fixture

@pytest.fixture(scope="session", autouse=True)
def existing_crash_dumps(request):
    request.session.crash = False
    existing_crash_dumps = list_crash_dumps()
    print(f"Existing crash dumps before tests: {existing_crash_dumps}")

    yield existing_crash_dumps

    if is_new_dump(existing_crash_dumps):
        request.session.crash = True

Here, I want to retrieve the crash value and put it in my report

def pytest_json_runtest_metadata(item, call):

    if call.when != "call":
        
        return {}
  
    crash = getattr(item, "crash")

    metadata = {
        "date": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
        "crash": crash
    }

    return metadata

But the value is always False, even when I entered the if statement after yield. I understood that after yield, we are in the teardown phase of a test, but is there a way to retrieve a value from this point? Basically, what's after the yield statement is what I want to check after a test has finished, hence checking at teardown.