This is an auto-filled bug because sci-libs/mpir fails tests. The issue was originally discovered on arm64, 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 636596 [details] build.log build log and emerge --info
I think this is a duplicate of bug 640424. Hopefully not happening anymore on 3.0.0. *** This bug has been marked as a duplicate of bug 640424 ***