[GHC] #3766: Parsing of lambdas is not consistent with Haskell'98 report.

[GHC]

#3766: Parsing of lambdas is not consistent with Haskell'98 report.
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    Reporter:  lilac              |       Owner:                           
        Type:  bug                |      Status:  new                      
    Priority:  normal             |   Milestone:                           
   Component:  Compiler (Parser)  |     Version:  6.10.4                   
  Resolution:                     |    Keywords:                           
          Os:  Unknown/Multiple   |    Testcase:                           
Architecture:  Unknown/Multiple   |     Failure:  GHC rejects valid program
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Comment (by lilac):

 Correction: the Report's grammar admits two parses: (\x -> (x :: Int)) .
 id, and ((\x -> x) :: Int) . id; the "as far to the right as possible"
 rule picks the former.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3766#comment:1>
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