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Several places didn't do it, and in many cases it didn't matter because it would be a small allocation in a short-lived context; but other places may accumulate a few (for example, in CreateDatabaseUsingFileCopy, one per tablespace). In most databases this is highly unlikely to be very serious either, but it seems better to make the code consistent in case there's future copy-and-paste. The only case of actual concern seems to be the aforementioned routine, which is new with commit 9c08aea6a309, so there's no need to backpatch. As pointed out by Coverity.
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/.
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