According to the upstream bug, there's an issue with Python 2.6 during make check. I've pick up a patch which is in git upstream to solve this particular issue. Tests won't succeeded because of bug 245103. I have modified a little bit the patch, to undo a change concerning the FSF address.
Created attachment 190147 [details, diff] upstream patch
Created attachment 190149 [details, diff] ebuild's patch
*** Bug 278023 has been marked as a duplicate of this bug. ***
in 2.14.1-r1. Thanks for reporting and producing a patch.