[Haskell-cafe] ghci breakpoints

[Sean McLaughlin]

Hello,

  I'm having trouble setting breakpoints from ghci.  I load the files
and I can tell things are working correctly because I can run the
program and list the locations where I want to set breakpoints.  E.g.

Prelude> :list Focus.focus
510  > focus :: forall s m. Class s m => Neg -> m [Foci]
511  > focus f =
512  >   let ats = Path.atoms f

But when I try to set a breakpoint I get

Prelude> :break Focus.focus
No breakpoints found at that location.

Does anyone have ideas about what I'm doing wrong in this case?  Do I
need to load with some special options to have breakpoints work?

Thanks,

Sean