https://issues.dlang.org/show_bug.cgi?id=17519
--- Comment #3 from [email protected] --- Commits pushed to master at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/29c7f36df591e3137233460940cdd824a745786c fix issue 17519 - RedBlackTree doesn't like const/immutable elements https://github.com/dlang/phobos/commit/173ccd835b5080dde5eec00d0ddae35a954b87cd Merge pull request #5492 from aG0aep6G/rbtree-immutable --
