[pypy-issue] [issue1381] random() generator returning result outside the 0.0 .. 1.0 domain.

[klankschap]

klankschap <vm at klankschap.nl> added the comment:

On 23 Jan 2013, at 21:18, Amaury Forgeot d Arc wrote:

> 
> Amaury Forgeot d Arc <amauryfa at gmail.com> added the comment:
> 
> Unfortunately the unit test added by CPython http://hg.python.org/cpython/rev/6df0b4ed8617
> already passes with PyPy.  Did you experience this issue on PyPy?
> 
> The test passes probably for a bad reason, the jumpahead implementation is slightly different on PyPy: 
> compare
>    for (i = N-1; i > 1; i--) {
> with
>    for i in range(N - 1, 0, -1):

i do have the same issue with pypy.
Pretty annoying as you have to insert ad hoc checks for 
u = random()

But it seems related to the random.jumpahead() function.

.F

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PyPy bug tracker <tracker at bugs.pypy.org>
<https://bugs.pypy.org/issue1381>
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