[GHC] #14382: The 'impossible' happened whilst installing gi-gtk via cabal

[GHC]

#14382: The 'impossible' happened whilst installing gi-gtk via cabal
--------------------------------------+---------------------------------
           Reporter:  maartenjacobs   |             Owner:  (none)
               Type:  bug             |            Status:  new
           Priority:  normal          |         Milestone:
          Component:  Compiler        |           Version:  8.2.1
           Keywords:  gtk, pango      |  Operating System:  Linux
       Architecture:  x86_64 (amd64)  |   Type of failure:  None/Unknown
          Test Case:                  |        Blocked By:
           Blocking:                  |   Related Tickets:
Differential Rev(s):                  |         Wiki Page:
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 I've been trying to install gi-gtk using "cabal install gi-gtk". In the
 process I upgraded to the most recent stable GHC and cabal. I've also
 installed gtk3 libraries which I thought were necessary.

 {{{
 ...
 [91 of 95] Compiling GI.Pango.Objects.Layout ( GI/Pango/Objects/Layout.hs,
 dist/build/GI/Pango/Objects/Layout.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.2.1 for x86_64-unknown-linux):
         tcIfaceGlobal (local): not found
   You are in a maze of twisty little passages, all alike.
   While forcing the thunk for TyThing Layout
   which was lazily initialized by initIfaceCheck typecheckLoop,
   I tried to tie the knot, but I couldn't find Layout
   in the current type environment.
   If you are developing GHC, please read Note [Tying the knot]
   and Note [Type-checking inside the knot].
   Consider rebuilding GHC with profiling for a better stack trace.
   Contents of current type environment: []
   Call stack:
       CallStack (from HasCallStack):
         prettyCurrentCallStack, called at
 compiler/utils/Outputable.hs:1133:58 in ghc:Outputable
         callStackDoc, called at compiler/utils/Outputable.hs:1137:37 in
 ghc:Outputable
         pprPanic, called at compiler/iface/TcIface.hs:1696:23 in
 ghc:TcIface

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

 Failed to install gi-pango-1.0.15
 cabal: Error: some packages failed to install:
 gi-gdk-3.0.14-INozoUgbf2HFkX3VeIwKfl depends on gi-gdk-3.0.14 which failed
 to
 install.
 gi-gtk-3.0.17-1AObKz0Ppj5GXVupmEC7Yc depends on gi-gtk-3.0.17 which failed
 to
 install.
 gi-pango-1.0.15-E4HLwHGC2n62ObUIQeuwp8 failed during the building phase.
 The
 exception was:
 ExitFailure 1
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14382>
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