[Python-Dev] Challenge: Please break this! (a.k.a restricted mode revisited)

[Serhiy Storchaka]

On 10.04.16 19:51, Jon Ribbens wrote:
> On Sun, Apr 10, 2016 at 02:51:23PM +1000, Nick Coghlan wrote:
>> On 9 April 2016 at 22:43, Victor Stinner <victor.stinner at gmail.com> wrote:
>>> See pysandbox test suite for a lot of ways to escape a sandbox. CPython has
>>> a list of know code to crash CPython (I don't recall the dieectory in
>>> sources), even with the latest version of CPython.
>>
>> They're at https://hg.python.org/cpython/file/tip/Lib/test/crashers
>
> Thanks. I take your point that sandboxing Python requires CPython to
> free of code execution bugs. However I will note that none of the
> crashers in that directory will work inside my experiment (except
> "infinite_loop_re.py", which isn't a crasher just a long loop).

Try following example:

     it = iter([1])
     for i in range(1000000):
         it = filter(None, it)
     next(it)