Changelog for libestr0-0.1.11-2.1.x86_64.rpm :

* Mon Oct 29 2018 janAATTgerhards.net-libestr 0.1.11: + portability: remove issues associated with AC_FUNC_MALLOC This configure.ac macro is known to cause issues and not provide real benefit. Thus many projects have removed it, as we have for most of the rsyslog projects. libestr seemed to have overlooked. This came up when troubleshooting issues on IBM AIX. + make build on AIX Thanks to github user purnimam1 for the patch + bugfix: es_str2num mishandling empty strings If es_str2num() receives an empty string, misadressing happens. Under extreme conditions, this theoretically can lead to a segfault. Thanks to Jan Gerhards for the patch.