bug report

[Marc van Dongen]

Hi,

While I was constructing an example for ghc-users, I created the following
program which crashed ghc-2.03.

> module Tmp( g ) where

> data AB p q = A
>             | B p q

> g :: (Ord p,Ord q) => (AB p q) -> Bool
> g (B _ _)
>   = g A

  tmp.lhs:6: 
      Warning: Possibly incomplete patterns in the definition of function `g'

  zonkIdOcc: g_aoQ

  panic! (the `impossible' happened):
          lookupBindC:no info!
  for: g_aoQ
  (probably: data dependencies broken by an optimisation pass)
  static binds for:
  Tmp.$d1{-rmM,x-}
  local binds for:

Two seconds later, my system crashed. I assume ghc-2.03 did not cause this :-)


Regards,


Marc