[GHC] #14388: GHC Panic

[GHC]

#14388: GHC Panic
-------------------------------------+-------------------------------------
        Reporter:  aferrandi         |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:  IfaceTyLit
                                     |  panic
Operating System:  Linux             |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Old description:

> Building the project exmap I,ve got:
>
> Information:stack: Building 'exmap' ...
> Information:stack: /usr/bin/stack build . --stack-yaml
> /home/andrea/prj/exmap/server/stack.yaml "--ghc-options=-Wall -Werror"
> exmap-0.1.0.0: configure (exe)
> Configuring exmap-0.1.0.0...
> exmap-0.1.0.0: build (exe)
> Preprocessing executable 'exmap' for exmap-0.1.0.0...
> ghc: panic! (the 'impossible' happened)
>   (GHC version 8.0.2 for x86_64-unknown-linux):
>         get IfaceTyLit 255
> Information:stack: Please report this as a GHC bug:
> http://www.haskell.org/ghc/reportabug
> Information:stack: --  While building package exmap-0.1.0.0 using:
>       /home/andrea/.stack/setup-exe-cache/x86_64-linux/Cabal-
> simple_mPHDZzAJ_1.24.2.0_ghc-8.0.2 --builddir=.stack-
> work/dist/x86_64-linux/Cabal-1.24.2.0 build exe:exmap --ghc-options "
> -ddump-hi -ddump-to-file"
>     Process exited with code: ExitFailure 1
> Information:25.10.17 16:19 - Compilation completed with 1 error and 0
> warnings in 1s 946ms
> Error:stack: Stack build failed with nonzero exit status

New description:

 Building the project exmap I,ve got:
 {{{
 Information:stack: Building 'exmap' ...
 Information:stack: /usr/bin/stack build . --stack-yaml
 /home/andrea/prj/exmap/server/stack.yaml "--ghc-options=-Wall -Werror"
 exmap-0.1.0.0: configure (exe)
 Configuring exmap-0.1.0.0...
 exmap-0.1.0.0: build (exe)
 Preprocessing executable 'exmap' for exmap-0.1.0.0...
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.0.2 for x86_64-unknown-linux):
         get IfaceTyLit 255
 Information:stack: Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 Information:stack: --  While building package exmap-0.1.0.0 using:
       /home/andrea/.stack/setup-exe-cache/x86_64-linux/Cabal-
 simple_mPHDZzAJ_1.24.2.0_ghc-8.0.2 --builddir=.stack-
 work/dist/x86_64-linux/Cabal-1.24.2.0 build exe:exmap --ghc-options "
 -ddump-hi -ddump-to-file"
     Process exited with code: ExitFailure 1
 Information:25.10.17 16:19 - Compilation completed with 1 error and 0
 warnings in 1s 946ms
 Error:stack: Stack build failed with nonzero exit status
 }}}

--

Comment (by bgamari):

 What is `exmap`? I don't see a package by this name on Hackage.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14388#comment:1>
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