This is far too sporadic,feel free to close. There is definitely something funky going on but it seems to only be triggered by an intricate combination of non-trivial exit hooks, emacs 24.4 and a process that runs to completion.
Andreas Schwab writes:
>> ================================================================
>> 052f924a01f8a65ca0bfc9e6584302613e019489 is the first bad commit
>
> That may mean that you misattributed one of the steps. Perhaps the
> failure condition actually depends on external events?
That was a PEBCAK :-)
Running again, this commit is good. Hopefully we'll have our answer in
the next few hours.
--
Best regards,
Sam