https://issues.dlang.org/show_bug.cgi?id=21724
--- Comment #4 from Dlang Bot <dlang-bot@dlang.rocks> --- dlang/phobos pull request #8012 "merge stable" was merged into master: - d32131d952ebe6f87b7e191f20788a1a9cd9b723 by Nathan Sashihara: Fix Issue 21724 - std.algorithm.mutation.copy fails on overlapping arrays if the source array's pointer is less than the destination array's pointer https://github.com/dlang/phobos/pull/8012 --