panic when compiling record implementation using type families

Attached is a current snapshot of the grapefruit-records package. Compilation of this package fails with this error message:

ghc-6.8.2: panic! (the 'impossible' happened)
  (GHC version 6.8.2 for i386-unknown-linux):
        mkStgAlts grapefruit-records-0.0.0.0:Data.Record.Complete{tc r1KI}

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Sorry that again I don’t provide a smaller test case. At the moment I have so little time to actually work on Grapefruit and the related research that I really don’t want to spend much time for searching smaller test cases. :-(

Trac metadata

Trac field	Value
Version	6.8.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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panic when compiling record implementation using type families