[Issue 17519] RedBlackTree doesn't like const/immutable elements

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17519

--- Comment #4 from github-bugzilla at puremagic.com ---
Commits pushed to dmd-cxx 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

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