brin: avoid errors processing work item following concurrent reindex

2021-12-02 10:59:22 Daniel Gustafsson (d_gustafsson) Closed in commitfest 2021-11 with status: Returned with feedback 2021-10-04 14:48:16 Jaime Casanova (jcasanov) Closed in commitfest 2021-09 with status: Moved to next CF 2021-08-03 02:18:17 Masahiko Sawada (masahikosawada) Closed in commitfest 2021-07 with status: Moved to next CF 2021-07-07 07:54:53 Gurjeet Singh (gurjeet) Added gurjeet as reviewer 2021-04-08 15:30:46 Justin Pryzby (justinpryzby) Closed in commitfest 2021-03 with status: Moved to next CF 2021-02-01 12:05:34 Masahiko Sawada (masahikosawada) Closed in commitfest 2021-01 with status: Moved to next CF 2020-11-19 17:43:02 Justin Pryzby (justinpryzby) Changed authors to Álvaro Herrera (alvherre), Justin Pryzby (justinpryzby) 2020-11-19 17:43:02 Justin Pryzby (justinpryzby) Changed targetversion to stable 2020-11-19 17:42:40 Justin Pryzby (justinpryzby) Attached mail thread 20201113160007.GQ30691@telsasoft.com 2020-11-19 17:42:39 Justin Pryzby (justinpryzby) Created patch record