They both have new versions released. I got them working by just copying the jcommon-1.0.12.ebuild and the jfreechart-1.0.9-r1. Reproducible: Always Steps to Reproduce:
Created attachment 156205 [details] jcommon-1.0.13.ebuild
Created attachment 156207 [details] jfreechart-1.0.10
Fixed in CVS.