This is an auto-filled bug because dev-python/mako fails tests. The issue was originally discovered on ppc64, but it may be reproducible on other arches as well. If you think that a different summary clarifies the issue better, feel free to change it. Attached build log and emerge --info.
Created attachment 635848 [details] build.log build log and emerge --info
*** This bug has been marked as a duplicate of bug 720828 ***