The same test failed on ppc64el: https://buildd.debian.org/status/fetch.php?pkg=mclibs&arch=ppc64el&ver=20061220%2Bdfsg3-3&stamp=1438302711
Also on arm64, where the failure looks very like the mips64el failure reported above: https://buildd.debian.org/status/fetch.php?pkg=mclibs&arch=arm64&ver=20061220%2Bdfsg3-3&stamp=1442432457
