[Haskell-cafe] Stack overflow in simple code with getStdRandom / randomR (GHC)

[Henning Thielemann]

On Tue, 19 Apr 2011, Volker Stolz wrote:

> The following three-liner creates a stack overflow (on my machine, MacOS), and I'm a bit puzzled as to why:
>
>> import System.Random
>>
>> main = do
>>  mapM (const (getStdRandom (randomR (0, 50000::Int)))) [0..10000000]
>
> botanix:~ stolz$ ./a.out
> Stack space overflow: current size 8388608 bytes.
> Use `+RTS -Ksize -RTS' to increase it.

Shall it print something? I think mapM_ would be better here. If you 
compile with 'ghc -Wall' then GHC will also warn you, that you ignored the 
result of mapM. I think, HLint would also warn you.