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In commit 631dc390f49909a5c8ebd6002cfb2bcee5415a9d, we started to handle simple numeric timezone offsets via the zic library instead of the old CTimeZone/HasCTZSet kluge. However, we overlooked the fact that the zic code will reject UTC offsets exceeding a week (which seems a bit arbitrary, but not because it's too tight ...). This led to possibly setting session_timezone to NULL, which results in crashes in most timezone-related operations as of 9.4, and crashes in a small number of places even before that. So check for NULL return from pg_tzset_offset() and report an appropriate error message. Per bug #11014 from Duncan Gillis. Back-patch to all supported branches, like the previous patch. (Unfortunately, as of today that no longer includes 8.4.)
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.