https://issues.dlang.org/show_bug.cgi?id=15941
--- Comment #4 from github-bugzi...@puremagic.com --- Commits pushed to stable at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/bf1dde7ac7be6751d90ef43c6d303d6530beda6a Fix issue 15941 -- rbtree no longer supports classes https://github.com/dlang/phobos/commit/dbc30e664e6d4c4f53d28e355a715644eab222f8 Merge pull request #4353 from schveiguy/fix15941 Fix issue 15941 -- rbtree no longer supports classes --