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0ef65d0f55
Commit e39f99046 moved some code up closer to the start of DecodeInterval(), without noticing that it had been implicitly relying on previous checks to reject the case of empty input. Given empty input, we'd now dereference a pointer that hadn't been set, possibly leading to a core dump. (But if we fail to provoke a SIGSEGV, nothing bad happens, and the expected syntax error is thrown a bit later.) Per bug #17788 from Alexander Lakhin. Back-patch to v15 where the fault was introduced. Discussion: https://postgr.es/m/17788-dabac9f98f7eafd5@postgresql.org
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/.