https://issues.dlang.org/show_bug.cgi?id=16628
--- Comment #1 from github-bugzi...@puremagic.com --- Commits pushed to master at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/2a45a145e8d29bf0f4a12c8fc8296041e475ea60 Fix Issue 16628 - std.algorithm.equal for known empty or infinite ranges * If one of the ranges has `Range.empty == true`, we can define `equal` even when each `front` is not comparable. * If one range is infinite and the other defines `length`, return false. * If both are infinite, cause a compile-time error. https://github.com/dlang/phobos/commit/31dad0c099f33b5c584d24ed739e8e5785b71426 Merge pull request #4871 from ntrel/equal-empty-enum Fix Issue 16628 - std.algorithm.equal for known empty or infinite ranges --