Please update firewalld in portage to the latest version: 0.3.11.
Version 0.3.12 is out.
0.3.13
I'll co-maintain the package for future bug reports and bump request. :-] *firewalld-0.3.13 (25 May 2015) 25 May 2015; Matthias Maier <tamiko@gentoo.org> +firewalld-0.3.13.ebuild, firewalld-0.3.10.ebuild, metadata.xml: co-maintain package; version bump; also install man pages, bug #540108 reported by 'dE', also thanks to Jeroen Roovers