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The new MultiXact freezing routines introduced by commit 8e9a16ab8f7 neglected to consider tuples that came from a pg_upgrade'd database; a vacuum run that tried to freeze such tuples would die with an error such as ERROR: MultiXactId 11415437 does no longer exist -- apparent wraparound To fix, ensure that GetMultiXactIdMembers is allowed to return empty multis when the infomask bits are right, as is done in other callsites. Per trouble report from F-Secure. In passing, fix a copy&paste bug reported by Andrey Karpov from VIVA64 from their PVS-Studio static checked, that instead of setting relminmxid to Invalid, we were setting relfrozenxid twice. Not an important mistake because that code branch is about relations for which we don't use the frozenxid/minmxid values at all in the first place, but seems to warrants a fix nonetheless.
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.