[awolverp]

Bound::from_owned_ptr was used on Py_None(). This incorrectly takes ownership of the immortal None singleton.

When the Bound is dropped it issues a Py_DECREF. On some Python versions / builds this causes Python to attempt to deallocate None and panic.

None is immortal on CPython 3.12+, but the incorrect ownership is still wrong and can panic on other builds or older Python.

Fix

Replace from_owned_ptr with from_borrowed_ptr so the INCREF/DECREF pair is balanced.

// before
Ok(pyo3::Bound::from_owned_ptr(py, pyo3::ffi::Py_None()).unbind())

// after
Ok(pyo3::Bound::from_borrowed_ptr(py, pyo3::ffi::Py_None()).unbind())