Extending native types does not always work

Bug Description

I tried to extend various classes implementing PySizedLayout as stated in the docs, but it seems only a few of those classes can be used as base class. I tried:

• PyDict and PySet, which work fine.
• PyBool and PySlice, which gives this error: TypeError: type 'bool' (or 'slice') is not an acceptable base type
• Most importantly, PyFloat and PyFrozenSet give the following: Job 1, 'python3 test.py' terminated by signal SIGSEGV (Address boundary error)

Steps to Reproduce

1. Cargo.toml

[package]
name = "pyo3_test"
version = "0.1.0"
edition = "2021"

[dependencies]
pyo3 = { git = "https://github.com/PyO3/pyo3", features = ["extension-module"] }

[lib]
name = "pyo3_test"

crate-type = ["cdylib"]

2. Rust code:

use pyo3::types::PyFloat;
use pyo3::PyAny;
use pyo3::{pyclass, pymethods, pymodule, types::PyModule, PyResult, Python};

#[pyclass(extends=PyFloat)] // Or replace with other Py* struct
struct Number;

#[pymethods]
impl Number {
    #[new]
    #[pyo3(signature = (*_args, **_kwargs))]
    pub fn new(_args: &PyAny, _kwargs: Option<&PyAny>) -> Self {
        Self {}
    }
}

#[pymodule]
fn pyo3_test(_py: Python<'_>, m: &PyModule) -> PyResult<()> {
    m.add_class::<Number>()?;
    Ok(())
}

3. Python code:

from pyo3_test import Number

test = Number()

print(test)

4. Commands (inside venv)

$ maturin develop
$ python3 test.py

Backtrace

For PyFloat for example:

fish: Job 1, 'python3 test.py' terminated by signal SIGSEGV (Address boundary error)

and for PySlice:

TypeError: type 'slice' is not an acceptable base type
thread '<unnamed>' panicked at 'An error occurred while initializing class Number', /home/<user>/.cargo/git/checkouts/pyo3-a22e69bc62b9f0fd/6757391/src/pyclass.rs:412:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Traceback (most recent call last):
  File "/home/<user>/<path>/pyo3-test/test.py", line 1, in <module>
    from pyo3_test import Number
  File "/home/<user>/<path>/pyo3-test/venv/lib/python3.10/site-packages/pyo3_test/__init__.py", line 1, in <module>
    from .pyo3_test import *
pyo3_runtime.PanicException: An error occurred while initializing class Number

Your operating system and version

PopOS 22.04

Your Python version (python --version)

Python 3.10.6

Your Rust version (rustc --version)

rustc 1.67.0 (fc594f156 2023-01-24)

Your PyO3 version

master

How did you install python? Did you use a virtualenv?

python installed with apt (IIRC) and using a venv.

Additional Info

No response

Reproduce the issue with the provided Cargo.toml, Rust class, and Python script, then inspect pyclass.rs around the panic at line 412 and the PySizedLayout inheritance documentation. Compare behavior for PyDict, PySet, PyBool, PySlice, PyFloat, and PyFrozenSet. Done means unsupported bases fail safely and supported native types no longer trigger a segmentation fault.