Is it OK to use makeArray with ScopedAllocator to allocate something with a destructor?

Because the destructor is not called when ScopedAllocator goes out of scope. And if I manually call dispose, I get a double free error:

	struct A {
		int a;

		~this() nothrow {
		}
	}
	void test(){
		import std.experimental.allocator.mallocator : Mallocator;
		import std.experimental.allocator.building_blocks.scoped_allocator : ScopedAllocator;
		import std.experimental.allocator;
		ScopedAllocator!Mallocator alloc;

		auto b = alloc.makeArray!A(10, A(1));
		auto c = alloc.makeArray!A(2, A(2));


		alloc.dispose(b);
		alloc.dispose(c);

	}

	void main() {
		test();
	}

On Friday, 22 July 2016 at 01:54:28 UTC, Yuxuan Shui wrote:
> 		auto b = alloc.makeArray!A(10, A(1));
> 		auto c = alloc.makeArray!A(2, A(2));

I noticed (using dpaste) if you edit the 'b' line to only allocate 5 structs, and it won't crash. 6 or more, crash. Maybe a bug?

On Sunday, 24 July 2016 at 20:48:55 UTC, Nick Treleaven wrote:
> On Friday, 22 July 2016 at 01:54:28 UTC, Yuxuan Shui wrote:
>> 		auto b = alloc.makeArray!A(10, A(1));
>> 		auto c = alloc.makeArray!A(2, A(2));
>
> I noticed (using dpaste) if you edit the 'b' line to only allocate 5 structs, and it won't crash. 6 or more, crash. Maybe a bug?

Valgrind reports double free anyways. I think it's just the inaccuracy of the glibc double free detection.

On Monday, 25 July 2016 at 07:33:25 UTC, Yuxuan Shui wrote:
> Valgrind reports double free anyways. I think it's just the inaccuracy of the glibc double free detection.

Please file a bug - thanks!
https://issues.dlang.org/

I found this, maybe related:
https://issues.dlang.org/show_bug.cgi?id=16046

On Thursday, 28 July 2016 at 11:48:40 UTC, Nick Treleaven wrote:
> On Monday, 25 July 2016 at 07:33:25 UTC, Yuxuan Shui wrote:
>> Valgrind reports double free anyways. I think it's just the inaccuracy of the glibc double free detection.
>
> Please file a bug - thanks!
> https://issues.dlang.org/
>
> I found this, maybe related:
> https://issues.dlang.org/show_bug.cgi?id=16046

Fix: https://github.com/dlang/phobos/pull/4702