GHC 8.4.3 triggers GHC Bug during Haddock generations :(

[arianvp]

  Missing documentation for:
    deriveFamily (src/Generics/MRSOP/TH.hs:76)
 100% ( 12 / 12) in 'Generics.MRSOP.Base.Combinators'
 100% (  8 /  8) in 'Generics.MRSOP.Base'
haddock: panic! (the 'impossible' happened)
  (GHC version 8.4.3 for x86_64-unknown-linux):
        completeCall

fail_axvf
Select nodup wild_00
Stop[BoringCtxt] Rep Singl (El FamRoseInt) (Lkup ix CodesRoseInt)
Call stack:
    CallStack (from HasCallStack):
      callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable
      pprPanic, called at compiler/simplCore/Simplify.hs:1533:9 in ghc:Simplify

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

builder for '/nix/store/r256qk6r5fxgy6qrakfxjqi1xsql4b0p-generics-mrsop-1.1.1.drv' failed with exit code 1
cannot build derivation '/nix/store/z1wpzd70jwfng4sf4ilvgmjl7zj6lnnz-ghc-8.4.3-with-packages.drv': 1 dependencies couldn't be built
error: build of '/nix/store/z1wpzd70jwfng4sf4ilvgmjl7zj6lnnz-ghc-8.4.3-with-packages.drv' failed

[sjakobi]

Reported at https://ghc.haskell.org/trac/ghc/ticket/15517.

[sjakobi]

GHC-8.6.1 will include a fix! :)

[VictorCMiraldo]

Closing this as GHC-8.6.1 has already been released.