Below are the diffs I used to get from the 4.08 version to one that compiles and seems to work with 5.00. mike diff -c -a -r1.1 Observe.lhs *** Observe.lhs 10 Jan 2001 16:21:12 -0000 1.1 --- Observe.lhs 25 Jul 2001 16:44:09 -0000 *************** *** 107,113 **** \begin{code} import Exception ( catchAll ! , Exception(..) , throw , catchAllIO ) --- 107,113 ---- \begin{code} import Exception ( catchAll ! , Exception(..), IOException , throw , catchAllIO ) *************** *** 269,275 **** generate an IOError with a bottom in it, your just asking for trouble. \begin{code} ! instance Observable IOError where { observer = observeBase } \end{code} Functions. --- 269,275 ---- generate an IOError with a bottom in it, your just asking for trouble. \begin{code} ! instance Observable IOException where { observer = observeBase } \end{code} Functions. Alain Cremieux writes:

Hi, I'm currently trying to have Hood work with GHC, but I have some problems - I have succeeded in using the hugs version of Hood - I have dowloaded the GHC version (slightly different) but the compilation of the 'Observe' modules fails (the module is supposed to work with GHC 4.08 and I have GHC 5.00.2) : ...