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Wrong evaluation

It is correctly evaluated as a mate in 6 for black. Why do you think it's not?
@amorris : There are several posts in this thread (including the first one) in which I tried to explain why I think it isn't. If you disagree, please point out where you see an error in my arguments; otherwise I can't do much more than repeat them.
I spent 30 minutes attempting to duplicate this (most of that trying to read the move list in the picture - 36...e437.fxe4d338.Ra7Bc3+39.Kc1Bb440.Rd7Bd641.Rb7+Bb442.Rd7Bd643.Rb7+Kc344.e5Bxe545.Rxe7Kd446.Rd7+Ke447.Re7Kd448.Rd7+Ke449.Re7c350.h4Kd451.Rf7h552.Rf2Bd653.Ra2Bf4+54.Kb1Be355.Ra4+Kc556.Ra8c2+57.Ka2c1=Q58.Rc8+Kb4) and on my PC, Stockfish announces mate in 7, not mate in 6.
@Toadofsky : Sorry to hear it was hard to read the move list! I didn't mean to cause you any unnecessary work.

I think for this sort of transient bug it would be great to have a dump feature that allows the internal evaluation state to be dumped to a file so I could have preserved it and sent it to you.

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