Bug compiling with -fglasgow-exts

I have a bug, here's the error from the compiler.

ghc -fglasgow-exts -o build/Graphics/UI/GIO/Bitmap.o -package-name gio 
-ohi build/Graphics/UI/GIO/Bitmap.hi -odir build/Graphics/UI/GIO -c 
src/Graphics/UI/GIO/Bitmap.hs  -package port -O2 -ibuild
ghc-6.0.1: panic! (the `impossible' happened, GHC version 6.0.1):
        typecheck/TcRnTypes.lhs:233: Missing field in record 
construction TcRnTypes.top_errs
 
I attach the module wich caused the error and the module Attributes, 
wich I modified. The other files can be found in the current release 
(1.0) of htoolkit at htoolkit.sourceforge.net.

Vincenzo

Attributes.hs
Description: Text document

Bitmap.hs
Description: Text document

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