simple backtraces in ghci

[Simon Peyton-Jones]

| numbers for you, if you want.  I was wondering if there was=20
| any chance of something like this getting hard coded in.  I=20
| would want this turned off by default for compiled code, but=20
| for code loaded in ghci, I find it very useful...

see "Template metaprogramming in Haskell" on my home page, Section
8.1.

Not implemented yet, but it's coming.

S