[GHC] #10630: Template variable unbound in rewrite rule (GHC 7.10.1)

[GHC]

#10630: Template variable unbound in rewrite rule (GHC 7.10.1)
-------------------------------------+-------------------------------------
              Reporter:  Otini       |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  high        |         Milestone:
             Component:  Compiler    |           Version:  7.10.1
              Keywords:  panic,      |  Operating System:  Linux
  template, bitmap                   |   Type of failure:  GHC rejects
          Architecture:  x86_64      |  valid program
  (amd64)                            |        Blocked By:
             Test Case:              |   Related Tickets:
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
 I read this bug had been fixed in GHC 7.10, and yet I get this when trying
 to compile bitmap :

 {{{
 $ cabal install bitmap
 Resolving dependencies...
 Configuring bitmap-0.0.2...
 Building bitmap-0.0.2...
 Failed to install bitmap-0.0.2
 Build log ( /home/olivier/.cabal/logs/bitmap-0.0.2.log ):
 Configuring bitmap-0.0.2...
 Building bitmap-0.0.2...
 Preprocessing library bitmap-0.0.2...
 [ 1 of 10] Compiling Data.Bitmap.Internal ( Data/Bitmap/Internal.hs,
 dist/build/Data/Bitmap/Internal.o )
 [ 2 of 10] Compiling Data.Bitmap.Base ( Data/Bitmap/Base.hs,
 dist/build/Data/Bitmap/Base.o )
 [ 3 of 10] Compiling Data.Bitmap.IO   ( Data/Bitmap/IO.hs,
 dist/build/Data/Bitmap/IO.o )

 Data/Bitmap/IO.hs:1248:1: Warning:
     SPECIALISE pragma for non-overloaded function ‘myPlusPtr’

 Data/Bitmap/IO.hs:1249:1: Warning:
     SPECIALISE pragma for non-overloaded function ‘myPlusPtr’
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.10.1 for x86_64-unknown-linux):
         Template variable unbound in rewrite rule
   $fPixelComponentFloat3_X2Rc
   [$fPixelComponentFloat3_X2Rc]
   [$fPixelComponentFloat3_X2Rc]
   []
   []

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

 cabal: Error: some packages failed to install:
 bitmap-0.0.2 failed during the building phase. The exception was:
 ExitFailure 1
 $ ghc --version
 The Glorious Glasgow Haskell Compilation System, version 7.10.1
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10630>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler