14 Feb
2008
14 Feb
'08
3:02 p.m.
On Thu, Feb 14, 2008 at 2:55 PM, Don Stewart
You can use the profiler to get a stack trace, or use the new GHCi debugger to step backwards from the exception to the source.
I wrote a bit of a tutorial for this here:
http://cgi.cse.unsw.edu.au/~dons/blog/2007/11/14#no-exceptions
Section 6.3 of http://haskell.org/haskellwiki/Debugging also is relevant for using ghcu to step backward ... perhaps the section label is misleading, though. Feel free to modify as needed if you find the ghci stepper lets you find the problem -- Denis