This is an auto-filed bug because dev-python/iminuit fails to compile. The issue was originally discovered on amd64, 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. NOTE: If you need further logs, feel free to ask.
Created attachment 643504 [details] build.log build log and emerge --info
*** This bug has been marked as a duplicate of bug 672508 ***