cfg_attr with pyo3::pyclass(get_all) results in no class attributes being generated

[stonier]

Problem

❌ Fails - due to PyO3/pyo3#1003

#[cfg(feature = "python")]
use pyo3::prelude::*;

#[cfg_attr(feature = "python", pyo3_stub_gen::gen_stub_pyclass)]
#[cfg_attr(feature = "python", pyo3::pyclass)]
#[derive(Clone)]
pub struct Dimensions {
    #[pyo3(get, set)]
    pub length: f64,
    #[pyo3(get, set)]
    pub width: f64,
    #[pyo3(get, set)]
    pub height: f64,
}

❌ Fails - note the pyo3:: prefix in pyo3::pyclass

#[cfg_attr(feature = "python", pyo3_stub_gen::gen_stub_pyclass)]
#[cfg_attr(feature = "python", pyo3::pyclass(get_all,set_all)]
#[derive(Clone)]
pub struct Dimensions {
    pub length: f64,
    pub width: f64,
    pub height: f64,
}

✅ Succeeds:

#[cfg(feature = "python")]
use pyo3::prelude::*;

#[cfg_attr(feature = "python", pyo3_stub_gen::gen_stub_pyclass)]
#[cfg_attr(feature = "python", pyclass(get_all, set_all))]
#[derive(Clone)]
pub struct Dimensions {
    pub length: f64,
    pub width: f64,
    pub height: f64,
}

Expected

It works in all three cases.