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xmltotext_with_options sometimes tries to replace the existing root node of a libxml2 document. In that case xmlDocSetRootElement will unlink and return the old root node; if we fail to free it, it's leaked for the remainder of the session. The amount of memory at stake is not large, a couple hundred bytes per occurrence, but that could still become annoying in heavy usage. Our only other xmlDocSetRootElement call is not at risk because it's working on a just-created document, but let's modify that code too to make it clear that it's dependent on that. Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: Jim Jones <jim.jones@uni-muenster.de> Discussion: https://postgr.es/m/1358967.1747858817@sss.pgh.pa.us Backpatch-through: 16
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/.