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d24a96ce2c
libxml2 has deprecated the members of xmlBuffer, and it is recommended
to access them with dedicated routines. We have only one case in the
tree where this shows an impact: xml2/xpath.c where "content" was
getting directly accessed. The rest of the code looked fine, checking
the PostgreSQL code with libxml2 close to the top of its "2.14" branch.
xmlBufferContent() exists since year 2000 based on a check of the
upstream libxml2 tree, so let's switch to it.
Like 400928b83b, backpatch all the way down as this can have an impact
on all the branches already released once newer versions of libxml2 get
more popular.
Reported-by: Walid Ibrahim <walidib@amazon.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/aGdSdcR4QTjEHX6s@paquier.xyz
Backpatch-through: 13
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/.