haddock : panic! (the 'impossible' happened)

On linux-powerpc64:

*** Core Lint warnings : in result of Desugar (after optimization) ***
{-# LINE 812 "compiler/main/TidyPgm.lhs #-}: Warning:
    [RHS of $c>>_arNji :: forall a_a3Rz b_a3RA.
            TidyPgm.DFFV a_a3Rz -> TidyPgm.DFFV b_a3RA -> 
                 TidyPgm.DFFV b_a3RA]
    INLINE binder is (non-rule) loop breaker: $c>>_arNji

haddock: panic! (the 'impossible' happened)
  (GHC version 7.7.20121119 for powerpc64-unknown-linux):
        mkWWcpr: not a product
<<details unavailable>>

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

make[1]: *** [compiler/stage2/doc/html/ghc/ghc.haddock] Error 1
make: *** [all] Error 2

Possibly related to #7267 (closed).

Trac metadata

Trac field	Value
Version	7.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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