[3.10] bpo-45408: Don't override previous tokenizer errors in the second parser pass (GH-28812). (GH-28813)

(cherry picked from commit 0219017df7ec41839fd0d56a3076b5f09c58d313)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
4 files changed