[GHC] #16088: The 'impossible' happened when I was trying to use getCurrentDirectory in repl in spacemacs.

[GHC]

#16088: The 'impossible' happened when I was trying to use getCurrentDirectory in
repl in spacemacs.
-------------------------------------+-------------------------------------
        Reporter:  hanrai            |                Owner:  (none)
            Type:  bug               |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.4.4
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  None/Unknown      |            Test Case:
                                     |  getCurrentDirectory
      Blocked By:                    |             Blocking:
 Related Tickets:  #14963, #16080    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * related:  #16080 => #14963, #16080


Comment:

 Here is how to reproduce this:

 {{{
 $ /opt/ghc/8.4.4/bin/ghci -fdefer-type-errors
 GHCi, version 8.4.4: http://www.haskell.org/ghc/  :? for help
 Loaded GHCi configuration from /home/rgscott/.ghci
 λ> import System.Directory
 λ> getCurrentDirectory
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.4.4 for x86_64-unknown-linux):
         nameModule
   system $dShow_a2lk
   Call stack:
       CallStack (from HasCallStack):
         callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in
 ghc:Outputable
         pprPanic, called at compiler/basicTypes/Name.hs:241:3 in ghc:Name
 }}}

 Given that this is not reproducible with GHC 8.6, this is almost assuredly
 a duplicate of #14963, so I'll close this ticket in favor of that one.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16088#comment:3>
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