Stack overflow death
GHCI dies without any warning, if evaluation of the function ex3 in the following code fragment is attempted:
ex2 x partial sum n = let partial = partial * x / fromIntegral(n)
in if (partial + sum == sum)
then sum
else ex2 x partial (sum + partial) (n+1)
ex3 x = ex2 x 1 1.0 1