[Cython] Segfault with large cdef'd list

[Robert Bradshaw]

Cython itself doesn't impose any limits, but it does inherit whatever
limit exists in the C complier and runtime. The variance may be due to
whatever else happens to be placed on the stack.

On Sat, Jan 6, 2018 at 10:57 PM, Dan Stromberg <drsalists at gmail.com> wrote:
> I'm getting a weird segfault from a tiny function (SSCCE) using cython
> with python 2.7.  I'm seeing something similar with cython and python
> 3.5, though I did not create an SSCCE for 3.5.
>
> This same code used to work with slightly older cythons and pythons,
> and a slightly older version of Linux Mint.
>
> The code is at http://stromberg.dnsalias.org/svn/why-is-python-slow/trunk
> (more specifically at
> http://stromberg.dnsalias.org/svn/why-is-python-slow/trunk/tst.pyx )
>
> In short, cdef'ing a list of doubles with about a million elements,
> and using only the 0th element once, segfaults - but cdef'ing a
> slightly smaller array does not segfault under otherwise identical
> conditions.
>
> Any suggestions?  Does Cython have a limit on the max size of a stack frame?
>
> Thanks!  I quite like cython.
> _______________________________________________
> cython-devel mailing list
> cython-devel at python.org
> https://mail.python.org/mailman/listinfo/cython-devel