Interface files messed up?

[Peter Simons]

Hi,

I have a problem with the current GHC. When I compile the module
available at <http://peti.cryp.to/ADns.hsc>, I get the following
error:

 | $ hsc2hs ADns.hsc && ghc -c ADns.hs
 |
 | Can't find interface-file declaration for GHC.Err.assertError
 |   Probable cause: bug in .hi-boot file, or inconsistent .hi file
 |   Use -ddump-if-trace to get an idea of which file caused the error
 |
 | ADns.hsc:47: tcLookupGlobal: `adnsStrerror' is not in scope

The full output is available at <http://peti.cryp.to/ddump-if-trace>.
GHC 6.0 compiles this just fine, as does the current GHC when I add
the '-fignore-asserts' switch.

Any idea what this could be?

Peter