[GHC] #6139: Data.Time.Day read instance too liberal

[GHC]

#6139: Data.Time.Day read instance too liberal
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 Reporter:  guest                        |          Owner:                  
     Type:  bug                          |         Status:  new             
 Priority:  normal                       |      Component:  libraries/base  
  Version:  7.0.3                        |       Keywords:                  
       Os:  Unknown/Multiple             |   Architecture:  Unknown/Multiple
  Failure:  Incorrect result at runtime  |       Testcase:                  
Blockedby:                               |       Blocking:                  
  Related:                               |  
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 Prelude Data.Time> read "0001-22-01" :: Day
 0001-12-01

 Obviously, this should be a parse error.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6139>
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