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Tied hashes, and probably tied arrays, are capable of returning Perl value pointers that are actually NULL, not the usual pointer to an undef SV. We were not defending against that everywhere, leading to possible SIGSEGV. Fix the code to consistently treat a null pointer returned from hv_iternext or av_fetch like a !SvOK one. (Note that the large diff in SV_to_JsonbValue is actually quite trivial, but it required reindenting a chunk of existing code.) Claude Code found the instance in hstore_plperl, and I found the others by code auditing. Perhaps the other instances aren't actually reachable, but I see little reason to assume that. The known test cases for these errors require perl's Tie modules, which may not be present, so it doesn't seem worth the trouble to create regression test cases that would cover them. Reported-by: Claude Code (via Noah Misch) Author: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/569769.1786901901@sss.pgh.pa.us Backpatch-through: 14
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/.