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Adopt a more consistent policy about what slot-type-specific getsysattr functions should do when system attributes are not available. To wit, they should all throw the same user-oriented error, rather than variously crashing or emitting developer-oriented messages. This closes a identifiable problem in commits a71cfc56b and 3fb93103a (in v13 and v12), so back-patch into those branches, along with a test case to try to ensure we don't break it again. It is not known that any of the former crash cases are reachable in HEAD, but this seems like a good safety improvement in any case. Discussion: https://postgr.es/m/141051591267657@mail.yandex.ru
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/.