[Haskell-cafe] A guess on stack-overflows - thunks build-up and tail recursion

Ketil Malde ketil at malde.org
Fri Mar 20 08:43:47 EDT 2009

GüŸnther Schmidt <gue.schmidt at web.de> writes:

> Apparently it is the evaluation of this huge build-up that causes the
> stack-overflow but not the thunk-build-up *as such*.

> Do I understand this correctly?

I think that is correct.

  Prelude> foldl (+) 0 [1..1000000]
  *** Exception: stack overflow
  Prelude> foldl const 0 [1..1000000]
  Prelude> foldl (flip const) 0 [1..1000000]

If I haven't seen further, it is by standing in the footprints of giants

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