[GHC] #12216: GHC 8.0.1 panics when compiling JuicyPixels-repa 0.7.1

[GHC]

#12216: GHC 8.0.1 panics when compiling JuicyPixels-repa 0.7.1
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        Reporter:  cgo               |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  MacOS X           |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Description changed by simonpj:

@@ -2,1 +2,1 @@
-
+ {{{
@@ -22,1 +22,1 @@
-
+ }}}

New description:

 This just happened on macOS 10.11.5:
 {{{
 Configuring JuicyPixels-repa-0.7.1.0...
 Building JuicyPixels-repa-0.7.1.0...
 Preprocessing library JuicyPixels-repa-0.7.1.0...
 [1 of 1] Compiling Codec.Picture.Repa ( Codec/Picture/Repa.hs, dist/dist-
 sandbox-94652cd7/build/Codec/Picture/Repa.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.0.1 for x86_64-apple-darwin):
         filterImports/combine
   (Array,
    Array{Array, AByteString, ACursored, ADelayed, AForeignPtr,
 AInterleave, ASmall, APart, AUnboxed, AUndefined, AVector, cursoredExtent,
 loadCursor, makeCursor, shiftCursor},
    Nothing)
   (Array,
    Source{Source, Array, deepSeqArray, extent, index, linearIndex,
 unsafeIndex, unsafeLinearIndex},
    Nothing)

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
 }}}
 cabal: Leaving directory '/var/folders/lj/5d92khf937120qgs9xccbn400000gn/T
 /cabal-tmp-24887/JuicyPixels-repa-0.7.1.0'
 Updating documentation index

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12216#comment:1>
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