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Coverity complained that offset cannot be 0 here because there's an explicit check for "offset == 0" earlier in the function, but it didn't see the possibility that offset could've wrapped around to 0. The code is correct, but clarify the comment about it. The same code exists in backbranches in the server GetMultiXactIdMembers() function and in 'master' in the pg_upgrade GetOldMultiXactIdSingleMember function. In backbranches Coverity didn't complain about it because the check was merely an assertion, but change the comment in all supported branches for consistency. Per Tom Lane's suggestion. Discussion: https://www.postgresql.org/message-id/1827755.1765752936@sss.pgh.pa.us
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: https://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. 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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.