[Haskell-cafe] Re: Diagnosing stack overflow

Bryan O'Sullivan bos at serpentine.com
Fri Aug 17 18:42:56 EDT 2007

Joe Buehler wrote:

> What is the point in building this huge thunk if it can't be evaluated
> without a stack overflow?

It's not that there's a point to it, it's just the behaviour of foldl. 
   Hence you shouldn't be using foldl.

GHC's strictness analyser can sometimes save you from yourself if you're 
compiling with -O, but it's better to just avoid foldl and use foldr or 
Data.List.foldl' instead.


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