[GHC] #14691: Replace EvTerm with CoreExpr

[GHC]

#14691: Replace EvTerm with CoreExpr
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        Reporter:  nomeata           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.3
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by nomeata):

 The error message, with a bit more detail, is
 {{{
 libraries/base/Data/Typeable/Internal.hs:618:5: error:
     • GHC internal error: ‘mkTrCon’ is not in scope during type checking,
 but it passed the renamer
       tcl_env of environment: [088 :-> Identifier[mkTrType::TypeRep
                                                               *,
 TopLevelLet],
                                089 :-> Identifier[mkTrCon::forall k (a ::
 k).
                                                            TyCon
                                                            ->
 [SomeTypeRep]
                                                            -> TypeRep a,
 TopLevelLet [] True],
 }}}

 Doesn’t that mean that `mkTrCon` actually is in scope, but somehow the
 lookup doesn't find it (different Unique maybe?)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14691#comment:10>
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