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gh-102947: Improve traceback when calling `fields()` on a non-dataclass (GH-102948)

(cherry picked from commit baf4eb083c09b323cc12b8636c28c14089b87de8)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
M
Miss Islington (bot) committed
6ffeeb2199176b8433c1b7b46e669132e44d394d
Parent: f79cfb6
Committed by GitHub <noreply@github.com> on 3/23/2023, 2:45:59 PM