Changelog for json-c12-0.12.1-2.el7.x86_64.rpm :
Sat Dec 16 13:00:00 2017 Björn Esser - 0.12.1-2
- Add patch to fix undefined behaviour by assert

Mon May 8 14:00:00 2017 Jeffrey Lau - 0.12.1-1
- Initial compat-package for EPEL >= 6, based on json-c from recent Fedora