[GHC] #15511: GHCi internal error with runQ [| it |] and _

[GHC]

#15511: GHCi internal error with runQ [| it |] and _
-------------------------------------+-------------------------------------
           Reporter:  ChaiTRex       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.4.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 GHCi gives a GHC internal error with the following input:

 {{{
 :set -XTemplateHaskell
 :m + Language.Haskell.TH.Syntax
 runQ [| it |]
 runQ [| it |]
 _
 }}}

 Session:

 {{{
 $ ghci
 GHCi, version 8.4.3: http://www.haskell.org/ghc/  :? for help
 Prelude> :set -XTemplateHaskell
 Prelude> :m + Language.Haskell.TH.Syntax
 Prelude Language.Haskell.TH.Syntax> runQ [| it |]
 UnboundVarE it
 Prelude Language.Haskell.TH.Syntax> runQ [| it |]
 VarE Ghci1.it
 Prelude Language.Haskell.TH.Syntax> _

 <interactive>:1:1: error:
     GHC internal error: ‘Ghci1.it’ is not in scope during type checking,
 but it passed the renamer
     tcl_env of environment: []
 Prelude Language.Haskell.TH.Syntax>
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15511>
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