[GHC] #12774: bkpcabal02 test fails on OS X

[GHC]

#12774: bkpcabal02 test fails on OS X
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        Reporter:  bgamari           |                Owner:
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Test Suite        |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by ezyang):

 I just pushed a small doc addition. But it's pretty self-explanatory: one
 of the signatures has the right type (in1) and the second signature
 doesn't (in2). Maybe we need a sleep before we do the 'cp'? I would have
 thought build would take some time so that it wouldn't be necessary.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12774#comment:2>
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