Spikes in array capacity

[Steven Schveighoffer]

On Fri, 02 Jul 2010 14:50:53 -0400, Steven Schveighoffer  
<schveiguy at yahoo.com> wrote:

> On Fri, 02 Jul 2010 13:01:41 -0400, Ali Çehreli <acehreli at yahoo.com>  
> wrote:
>
>> I've also discovered that a basic array invariant is violated at size  
>> 509 as well:
>>
>> import std.string;
>> import std.array;
>>
>> void main()
>> {
>>      int[] a;
>>      a.length = 509;
>>      a ~= 0;
>>
>>      assert(a.capacity >= a.length,
>>             format("capacity: %s length: %s", a.capacity, a.length));
>> }
>>
>> Outputs
>>
>> core.exception.AssertError at deneme.d(17444): capacity: 509 length: 510
>>
>> I will update the bug with these.
>
> Thanks.  I just figured this one out :)  Very interesting bug indeed.

FYI: http://www.dsource.org/projects/druntime/changeset/317

-Steve