Qualified name required when defining type family instance in instance declaration

With these two modules, GHC gives the following error:

Bar.hs:3:30: Not in scope: type constructor or class `T'

I have to use Foo.T in the instance definition. This is inconsistent with method definitions which must use unqualified names.

module Foo where
class C a where type T a

module Bar where
import qualified Foo
instance Foo.C Int where type T Int = Int

Trac metadata

Trac field	Value
Version	6.9
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
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CC
Operating system	Unknown
Architecture	Unknown