fix improper returns in PG_TRY blocks

When Who What
2023-05-04 23:44:51 Nathan Bossart (bossartn) Closed in commitfest 2023-07 with status: Committed
2023-05-04 23:44:51 Nathan Bossart (bossartn) Changed committer to bossartn
2023-05-03 20:23:22 Nathan Bossart (bossartn) Changed reviewers to Nathan Bossart (bossartn)
2023-05-03 20:23:22 Nathan Bossart (bossartn) Changed authors to Xing Guo (higuoxing)
2023-05-03 20:23:22 Nathan Bossart (bossartn) Changed targetversion to stable
2023-05-03 20:23:11 Nathan Bossart (bossartn) Attached mail thread CACpMh+CMsGMRKFzFMm3bYTzQmMU5nfEEoEDU2apJcc4hid36AQ@mail.gmail.com
2023-05-03 20:23:11 Nathan Bossart (bossartn) Created patch record