[1 of 3] Processing p
  [1 of 2] Compiling Q[sig]           ( p/Q.hsig, nothing )
  [2 of 2] Compiling P                ( p/P.hs, nothing )
[2 of 3] Processing q
  Instantiating q
  [1 of 1] Compiling QMe              ( q/QMe.hs, bkpfail13.out/q/QMe.o )
[3 of 3] Processing r
  [1 of 3] Compiling H[sig]           ( r/H.hsig, nothing )
  [2 of 3] Instantiating p

bkpfail13.bkp:8:9: error:
    • Identifier ‘f’ has conflicting definitions in the module
      and its hsig file
      Main module: f :: GHC.Types.Bool
      Hsig file:  f :: GHC.Types.Int
      The two types are different
    • while checking that q:QMe implements signature Q in p[Q=q:QMe]