[3.12] gh-105375: Improve _decimal error handling (GH-105605) (#105647)

Fix a bug where an exception could end up being overwritten.
(cherry picked from commit c932f7284977ebf813313157c52d716ba225a7ac)

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

Miss Islington (bot) committed 3y ago

b4b5565e4779d81c943bffe22ffe0972fa398702

Parent: 36ecbc3

Committed by GitHub <noreply@github.com> on 6/11/2023, 10:55:18 AM