Template variable unbound in rewrite rule (GHC 7.10.1)

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

Trac metadata

Trac field	Value
Version	7.10.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed weight to 7

added Tbug Trac import labels

changed milestone to %⊥

Should be fixed in 7.10.2 as part of #10251 (closed)

closed

changed milestone to %7.10.2

I confirmed that this is fixed in the ghc-7.10 branch.

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

added TemplateHaskell label

added Phigh label