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b82dca2a5a
This function would have the same issue we solved in commit 501cfd07d: If an error is thrown after calling CreateWaitEventSet(), the file descriptor (on epoll- or kqueue-based systems) or handles (on Windows) that the WaitEventSet contains are leaked. Like that commit, use PG_TRY-PG_FINALLY (PG_TRY-PG_CATCH in v12) to make sure the WaitEventSet is freed properly. Back-patch to all supported versions, but as we do not have this issue in HEAD (cf. commit 50c67c201), no need to apply this patch to it. Discussion: https://postgr.es/m/CAPmGK16MqdDoD8oatp8SQWaEa4vS3nfQqDN_Sj9YRuu5J3Lj9g%40mail.gmail.com