[3.13] gh-122145: Handle an empty AST body when reporting tracebacks (GH-122161) (#124214)

gh-122145: Handle an empty AST body when reporting tracebacks (GH-122161)
(cherry picked from commit 5cd50cb6eb28e525f0c838e049e900ea982a5a23)

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>