[GHC] #15202: Internal error showing typed hole in GHCi

[GHC]

#15202: Internal error showing typed hole in GHCi
-------------------------------------+-------------------------------------
           Reporter:  dfeuer         |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.5
  (Type checker)                     |
           Keywords:  TypedHoles     |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Compile-time
  Unknown/Multiple                   |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Run `ghc --interactive`, and at the prompt type

 {{{#!hs
 default ()
 fish :: Eq a => a; fish = undefined
 foo :: String; foo = show _
 }}}

 The following error appears:

 {{{
 <interactive>:1:1: error:
     GHC internal error: ‘Ghci1.$trModule’ is not in scope during type
 checking, but it passed the renamer
     tcl_env of environment: [r2CZ :-> Identifier[foo::String,
 TopLevelLet]]
 }}}

 I have not yet been able to reproduce this loading a module; it seems to
 need to be on the command line.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15202>
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