5f003855e7
Starting with commit011384ba45, calling to_date() or to_timestamp() with "TMMonth" or other TM-prefixed format keyword, with the C locale, would crash. In REL_19_STABLE and above, pg_strupper(), pg_strlower(), pg_strtitle(), and pg_strfold() functions have a special case for the C locale, but that was missing in REL_18_STABLE. On REL_18_STABLE, the functions call the libc function even in C locale, even though the native locale object is NULL. On Linux, the underlying libc functions will crash when called with NULL locale. (On macOS, they reportedly do not, but even then it's not clear if they will do what you'd expect.) This went unnoticed because until commit011384ba45, we never called these functions in C locale, all the callers had a special codepath for C locale. We could add a special path in the new callers too, but it's an accident waiting to happen, so let's backport the C locale-specific handling from REL_19_STABLE to REL_18_STABLE. Older versions did not have these functions at all, hence no problem. This applies to REL_18_STABLE only. Reported-by: Masashi Kamura <kamura.masashi@fujitsu.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Discussion: https://www.postgresql.org/message-id/OS9PR01MB1317436E07D06281AD1A0452F94DD2%40OS9PR01MB13174.jpnprd01.prod.outlook.com
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.