[Issue 13054] pure nothrow @safe std.algorithm.schwartzSort

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=13054

--- Comment #4 from Stanislav Blinov <stanislav.blinov at gmail.com> ---
Another partial fix:

https://github.com/dlang/phobos/pull/8329

If GC.add/removeRange could be fake pure, then this enhancement would be
fulfilled.

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