Hi, I have a small function to find all indices in an array where a given subword can be found, looking like this:

ind i ws ar | i+length ws-1 > len e = [] | and [ar!(i+j) == ws!!j | j<-[0..length ws-1]] = i : ind (i+1) ws ar | otherwise = ind (i+1) ws ar

(i::Int is the position, ws::[a] is the word to look for, while ar::Array Int a is the array wherein to look) This occasionally blows up with a stack overflow, perhaps I'm being dense, but I'm not sure why. Any suggestions? BTW, is there a general way to track down stack overflows? I use the -xc option, are there any other tricks I should know about? And does heap profiling (GHC) imply more stack usage -- I seem to get overflows much more easily when profiling. -kzm -- If I haven't seen further, it is by standing in the footprints of giants