Spurious "Overlapping Instances" error

[Wolfgang Thaller]

I've got another one! With the attached files and the CVS HEAD:

titan:~/Documents/Experiments/overlapBug wolfgang$ ghc --make Main.hs
Chasing modules from: Main.hs
Compiling Foo              ( ./Foo.hs, ./Foo.o )
Compiling Main             ( ./Main.hs, ./Main.o )
Linking ...
titan:~/Documents/Experiments/overlapBug wolfgang$ touch Main.hs
titan:~/Documents/Experiments/overlapBug wolfgang$ ghc --make Main.hs
Chasing modules from: Main.hs
Skipping  Foo              ( ./Foo.hs, ./Foo.o )
Compiling Main             ( ./Main.hs, ./Main.o )

Main.hs:5:
    Overlapping instances for Foo Int
      arising from use of `bar' at Main.hs:5
    Matching instances:
      Imported from `Foo': instance Foo Int
      Imported from `Foo': instance Foo Int
    In the definition of `main': main = bar (42 :: Int)

Happy Debugging,

Wolfgang

Main.hs

Description: Binary data


Foo.hs

Description: Binary data
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