There are too many error handling conventions used in library code!

[Jack Waugh]

Simon Peyton-Jones writes in
http://article.gmane.org/gmane.comp.lang.haskell.libraries/16016 :

> You may find these papers relevant, especially the first.  (Yes, you can catch
and recover from head []!)
> 
> http://research.microsoft.com/en-us/um/people/simonpj/papers/imprecise-exn.htm

Thank you very much; this is exactly the paper I needed to read, pointed out to
me exactly when I needed to read it.

Jack Waugh