[GHC] #8259: HEAD won't build on Windows

[GHC]

#8259: HEAD won't build on Windows
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        Reporter:  schyler           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Build System      |          Version:  7.7
      Resolution:                    |         Keywords:
Operating System:  Windows           |     Architecture:  x86
 Type of failure:  Building GHC      |       Difficulty:  Easy (less than 1
  failed                             |  hour)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by hvr):

 ...as discovered on irc, `./sync-all checkout master` was invoked
 somewhere inbetween, causing the wrong branch of `Cabal` being checked
 out, which is `git submodule` controlled, and thus has is not supposed to
 be branch-based.

 The remedy is to call `./sync-all pull` which will reset the Git
 submodules to their proper (detached) HEADs.

 This is a symptom of the unfinished Git submodule conversion.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8259#comment:2>
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