Package freemarker appears to be using Java generics, but generates class files in format older than 49.0, which corresponds to J2SE 5.0, in which generics were introduced. Please update this package to generate classes in format 49.0 or above. This corresponds to -target 1.5 option of javac (or ecj). For more information, see bug #842394
Fix pushed to rawhide: http://pkgs.fedoraproject.org/cgit/freemarker.git/commit/?id=beea5669c58d41888f6918fa4e0c8dfd6bf70224 And built: http://koji.fedoraproject.org/koji/taskinfo?taskID=4349169 The remaining classes are generated by rmic. There's nothing I can do about them.