Segfault during GTID configuration

[JavierJF]

Description

A segfault is triggered when ProxySQL is configured for using GTID, can't connect connect to the specified 'ProxySQL binlog readers', and a new configuration for GTID is supplied to ProxySQL.

Version: Os and ProxySQL

Confirmed OSs:

Distributor ID: Ubuntu
Description:    Ubuntu 19.10
Release:        19.10
Codename:       eoan

NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster

ProxysSQL version:

ProxySQL version 2.0.12-11-gd1032d12_DEBUG, codename Truls

Steps to reproduce the isssue:

1. Untar the provided tarball and cd into the tarball directory.
2. Launch the provided proxysql binary with the command: ./proxysql -f -c proxysql.cnf
3. Configure the running proxysql instance with the command: mysql -uadmin -padmin -h127.0.0.1 -P6032 < config.sql.
4. The crash should have been triggered.

Error log:

error-log.txt

Crash tarball:

gtid-config-segfault.tar.gz

Contents

• The coredump and the binary to reproduce the issue.
• The full error log.
• The current configuration necessary to reproduce the issue.