DAutoTest misbehaving (?)

[Cauterite via Digitalmars-d]

I'm struggling to comprehend this build failure from DAutoTest: 
http://dtest.thecybershadow.net/results/e5f10ec617c96bbee443e4e8e75e4352b7c06e5a/8809ebc5f2d4b10aac89054033a65b84b9150ae0/
In particular, I can't tell how it relates to any of the commits 
being tested. Since I have no prior experience contributing to 
Phobos I'm not really familiar with what to expect, basically.
I also tried reverting my commits, and it spits out the same 
failure.

Any suggestions about what's going on here?