_PyErr_ChainExceptions1 no longer avallable to extension modules in Python 3.13 alpha headers

Bug report

Bug description:

The API _PyErr_ChainExceptions1 has been removed from public headers as part of this change in Python 3.13 alpha. It is the only C API available to chain exceptions replacing _PyErr_ChainExceptions. That change was publicly documented in the 3.12 whatsnew.

In my extemsion module I use _PyErr_ChainExceptions for exception chaining for Python <= 3.11 from PEP 490 and _PyErr_ChainExceptions1for 3.12+.

Please provide an approved way for C extensions to continue to chain exceptions. The function is still present and I can duplicate the prototype for all to continue working, but that is not a desirable solution.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Linked PRs

• gh-116900

Comece pela alteração referenciada do Python 3.13 alpha na issue 106320 e pelo PR vinculado gh-116900; em seguida, analise como a C API pública expõe o encadeamento de exceções no Python 3.11–3.13. Considera-se concluído quando for estabelecida uma forma aprovada para que os extension modules encadeiem exceções sem duplicar um protótipo privado.