[GHC] #8251: Validate submodule references during pre-receive hook

[GHC]

#8251: Validate submodule references during pre-receive hook
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        Reporter:  hvr               |            Owner:  hvr
            Type:  task              |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Trac & Git        |          Version:  7.6.3
      Resolution:                    |         Keywords:  admin git
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  #8545 #8544
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Changes (by hvr):

 * related:   => #8545 #8544


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8251#comment:6>
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