[GHC] #8503: New GeneralizedNewtypeDeriving check still isn't permissive enough

[GHC]

#8503: New GeneralizedNewtypeDeriving check still isn't permissive enough
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        Reporter:  goldfire          |            Owner:  goldfire
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.7
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:  8548
        Blocking:                    |  Related Tickets:  #8541
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Comment (by nomeata):

 Ok, the problem were two missing characters:
 {{{
 @@ -432,7 +432,7 @@ renameDeriv is_boot inst_infos bagBinds
          =       -- Bring the right type variables into
                  -- scope (yuk), and rename the method binds
             ASSERT( null sigs )
 -           bindLocalNames (map Var.varName tyvars) $
 +           bindLocalNamesFV (map Var.varName tyvars) $
             do { (rn_binds, fvs) <- rnMethodBinds (is_cls_nm inst) (\_ ->
 []) binds
                ; let binds' = InstBindings { ib_binds = rn_binds
                                             , ib_pragmas = []
 }}}
 but now everything seems to work.

 I’m running validate right now. If it goes through, any objections to
 pushing wip/T8503 to master and closing this bug?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8503#comment:37>
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