Hi *,

I'm hoping someone could help me understand what the asserts in CoreToStg on line 240 and 216 are trying to tell me.

I hit both of them while trying to compile libraries as dyn.

WARNING: file compiler\stgSyn\CoreToStg.hs, line 250
  $trModule2 False True
ghc-stage1.exe: panic! (the 'impossible' happened)
  (GHC version 8.1.20160612 for x86_64-unknown-mingw32):
        ASSERT failed!
  file compiler\stgSyn\CoreToStg.hs line 216 $trModule2

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

WARNING: file compiler\simplCore\SimplCore.hs, line 633
  Simplifier bailing out after 4 iterations [6737, 736, 51, 9]
    Size = {terms: 12,990, types: 9,998, coercions: 443}
WARNING: file compiler\stgSyn\CoreToStg.hs, line 250
  $fEqBigNat_$c/= False True
ghc-stage1.exe: panic! (the 'impossible' happened)
  (GHC version 8.1.20160612 for x86_64-unknown-mingw32):
        ASSERT failed!
  file compiler\stgSyn\CoreToStg.hs line 240
  [$fEqBigNat_$c/=, $fEqBigNat]

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

Kind Regards,

Tamar