Add to changelog and migration

PyO3 · May 1, 2022 · acae555 · acae555
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -11,12 +11,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Implement `ToPyObject` for `[T; N]`. [#2313](https://github.com/PyO3/pyo3/pull/2313)
+- Added the internal `IntoPyResult` trait to give better error messages when function return types do not implement `IntoPy`. [#2326](https://github.com/PyO3/pyo3/pull/2326)
 
 ### Changed
 
 - Move `PyTypeObject::type_object` method to `PyTypeInfo` trait, and deprecate `PyTypeObject` trait. [#2287](https://github.com/PyO3/pyo3/pull/2287)
 - The deprecated `pyproto` feature is now disabled by default. [#2322](https://github.com/PyO3/pyo3/pull/2322)
 - Deprecate `ToBorrowedObject` trait (it is only used as a wrapper for `ToPyObject`). [#2333](https://github.com/PyO3/pyo3/pull/2333)
+- `impl<T, const N: usize> IntoPy<PyObject> for [T; N]` now requires `T: IntoPy` rather than `T: ToPyObject`. [#2326](https://github.com/PyO3/pyo3/pull/2326)
 
 ## [0.16.4] - 2022-04-14
 

diff --git a/guide/src/migration.md b/guide/src/migration.md
@@ -40,6 +40,10 @@ fn get_type_object<T: PyTypeInfo>(py: Python<'_>) -> &PyType {
 # Python::with_gil(|py| { get_type_object::<pyo3::types::PyList>(py); });
 ```
 
+### `impl<T, const N: usize> IntoPy<PyObject> for [T; N]` now requires `T: IntoPy` rather than `T: ToPyObject`
+
+If this leads to errors, simply implement `IntoPy`. Because pyclasses already implement `IntoPy`, you probably don't need to worry about this.
+
 ## from 0.15.* to 0.16
 
 ### Drop support for older technologies