how to track down out-of-bounds error?

[David Roundy]

In some code which uses UArrays, I'm getting the following error:

Fail: Ix{Int}.index: Index (3723) out of range ((0,3722))

Presumably this means I'm trying to access one beyond the end of an array.
The problem is trying to figure out where I'm doing this.  Unfortunately, I
have only been able to see this error on a rather large test repository,
where it takes seven minutes for the test to show up.

Any suggestions how I might most easily track this bug down?
-- 
David Roundy
http://www.abridgegame.org