dce507356a
The unwritten assumption of this code is that both events->head and events->tail are NULL together (an empty list) or they aren't. So the code was testing events->head for nullness and using that as a cue to deference events->tail, which annoys the Svace static code analyzer. We can silence it by testing events->tail member instead, and add an assertion about events->head to ensure it's all consistent. This code is very old and as far as we know, there's never been a bug report related to this, so there's no need to backpatch. This was found by the ALT Linux Team using Svace. Author: Alexander Kuznetsov <kuznetsovam@altlinux.org> Discussion: https://postgr.es/m/6d0323c3-3f5d-4137-af73-98a5ab90e77c@altlinux.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.
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/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/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/.