[phobos] Can somebody with OSX please reduce the Phobos unittest failure?

[Walter Bright]

Don Clugston wrote:
> We have an OSX-only failure, which I think is a compiler bug.
> It's failing in std.bigint, which only imports
> std.internal.math.biguintCore and std.internal.math.bignumX86.
> There's no dependency on anything else in Phobos, so it ought to be
> pretty easy to reduce.
> I can't reduce it, because I don't have OSX.
>
> The failing test is this one:
>     assert(BigInt(0x1234_5678_9ABC_5A5AL).toLong() == 0x1234_5678_9ABC_5A5AL);
>
> This is blocking a release.
>
>   

Found the problem - you're right, it's a compiler bug. A bad one. Oops!