[GHC] #5589: Duplicate type signature not reported

[GHC]

#5589: Duplicate type signature not reported
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    Reporter:  MikolajKonarski  |        Owner:                             
        Type:  bug              |       Status:  patch                      
    Priority:  normal           |    Milestone:                             
   Component:  Compiler         |      Version:  7.3                        
    Keywords:                   |     Testcase:                             
   Blockedby:                   |   Difficulty:                             
          Os:  Linux            |     Blocking:                             
Architecture:  x86_64 (amd64)   |      Failure:  GHC accepts invalid program
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Comment(by simonpj):

 Thanks very much.  Looks right.  I'll check and commit.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5589#comment:3>
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