[Issue 13615] stable sort not usable in @safe code

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13615

--- Comment #1 from Walter Bright <bugzilla at digitalmars.com> ---
This sort() calls TimSortImpl.sort(). It is @system because it calls
uninitializedArray(), which is an @system function.

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