[3.12] gh-105375: Improve PyErr_WarnExplicit() error handling (GH-105610) (#105659)

Bail on first error to prevent exceptions from possibly being
overwritten.
(cherry picked from commit 567d6ae8e77579173510fc948ac06b2ababf3d40)

Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>

Miss Islington (bot) committed 2y ago

db5022c16f94622285eda5f036450e34f5f415ce

Parent: c14f6ea

Committed by GitHub <noreply@github.com> on 6/11/2023, 7:51:30 PM