dev-java/junit-4.12 was released on 2014-12-04.
+*junit-4.12 (10 Jul 2015) + + 10 Jul 2015; Patrice Clement <monsieurp@gentoo.org> + +files/junit-4.12-build.xml, +junit-4.12.ebuild: + Version bump. Fix bug 535878. + Added to the tree, thanks.