[GHC] #14996: Typed holes are very slow

[GHC]

#14996: Typed holes are very slow
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  TypedHoles
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 sighingnow):

 Replying to [comment:2 monoidal]:
 > Another issue is this:
 >
 > {{{
 > <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: []
 > }}}
 >
 > (giving "1" twice is needed to reproduce the error)

 I think it's just a variant of ticket:11547, since the patch Phab:D2447
 has been reverted in ticket:14052.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14996#comment:3>
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