[GHC] #10703: -fth-dec-file can't handle lambdas

28 Jul 2015

      #10703: -fth-dec-file can't handle lambdas
-------------------------------------+-------------------------------------
              Reporter:  Fabian      |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.10.1
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  Other
  Unknown/Multiple                   |
             Test Case:              |        Blocked By:
              Blocking:              |   Related Tickets:  #10701
Differential Revisions:              |
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 {{{#!hs
 instance Data.TH.Object.Object InputDropboxFiles String
 Language.JavaScript.Interpret.Primitive where
   toObject x@(InputDropboxFiles {})
     = fromList
         (Data.Maybe.catMaybes
            [Just
               (\ k_axsq v_axsr -> (k_axsq, Data.TH.Convert.convert v_axsr)
                  "root" (inputDropboxFilesRoot x)),
             Just
               (\ k_axsq v_axsr -> (k_axsq, Data.TH.Convert.convert v_axsr)
                  "path" (inputDropboxFilesPath x)),
             fmap
               (\ k_axsq v_axsr -> (k_axsq, Data.TH.Convert.convert v_axsr)
 "rev")
               (inputDropboxFilesRev x),
             Just
               (\ k_axsq v_axsr -> (k_axsq, Data.TH.Convert.convert v_axsr)
                  "access_token" (inputDropboxFilesAccess_token x))])
 }}}

 {{{#!hs
 (\ k_axsq v_axsr -> (k_axsq, Data.TH.Convert.convert v_axsr))
                  "root" (inputDropboxFilesRoot x)
 }}}

 should be

 {{{#!hs
 ((\ k_axsq v_axsr -> (k_axsq, Data.TH.Convert.convert v_axsr)))
                  "root" (inputDropboxFilesRoot x)
 }}}

 ie. the lambda needs parentheses around it.

--
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10703
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler