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Commitf0eb83f

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Fix assertion failure and segmentation fault in backup code.
When a non-exclusive backup is canceled, do_pg_abort_backup() is calledand resets some variables set by pg_backup_start (pg_start_backup in v14or before). But previously it forgot to reset the session state indicatingwhether a non-exclusive backup is in progress or not in this session.This issue could cause an assertion failure when the session runningBASE_BACKUP is terminated after it executed pg_backup_start andpg_backup_stop (pg_stop_backup in v14 or before). Also it could causea segmentation fault when pg_backup_stop is called after BASE_BACKUPin the same session is canceled.This commit fixes the issue by making do_pg_abort_backup resetthat session state.Back-patch to all supported branches.Author: Fujii MasaoReviewed-by: Kyotaro Horiguchi, Masahiko Sawada, Michael Paquier, Robert HaasDiscussion:https://postgr.es/m/3374718f-9fbf-a950-6d66-d973e027f44c@oss.nttdata.com
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‎src/backend/access/transam/xlog.c

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@@ -11391,6 +11391,8 @@ do_pg_abort_backup(int code, Datum arg)
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{
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XLogCtl->Insert.forcePageWrites= false;
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}
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sessionBackupState=SESSION_BACKUP_NONE;
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WALInsertLockRelease();
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if (emit_warning)

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