bpo-45566: `test_frozen_pickle` checks all `pickle` protocols (GH-29150)


Refs https://github.com/python/cpython/pull/29147

Automerge-Triggered-By: GH:ericvsmith
(cherry picked from commit 07236d562e59c6650227be18fa6ffc66b18d4741)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
2 files changed