[Issue 18347] New: stdx.allocator dispose should be @safe

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18347

          Issue ID: 18347
           Summary: stdx.allocator dispose should be @safe
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: greensunny12 at gmail.com

---
import std.stdio;

void main() @safe
{
    import std.experimental.allocator.mallocator : Mallocator;
    import std.experimental.allocator : makeArray, dispose;
    alias alloc = Mallocator.instance;
    auto p = alloc.makeArray!ubyte(20);
    alloc.dispose(p);
}
---

https://run.dlang.io/is/t2IMq2

No ready why this shouldn't work.

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