On 06/20/2012 02:30 PM, kcrisman wrote:
On Thursday, April 19, 2012 3:25:44 PM UTC-4, leif wrote:
On 19 Apr., 05:33, Stephen Montgomery-Smith <step...@missouri.edu>
wrote:
> I think I have found the problem with sympow. It is nothing to do
with
> elliptic curves. It is simply a malloc/free error.
>
> In util.c there is a function free_data, which frees TACKS[0].
TACKS[0]
> is meant to be allocated in disk.c, but there are circumstances when
> TACKS[0] is not allocated.
>
> See the attached patch.
>
> I am not going to submit it as a trac ticket until I have heard from
> others. In general, how to different OS's react to "free(NULL)"?
I've created http://trac.sagemath.org/sage_trac/ticket/13144 for this.
We could just apply it only on FreeBSD, for instance.
I had responses from the email you just cited, and so I went ahead and
created a ticket here:
http://trac.sagemath.org/sage_trac/ticket/12858
So your ticket is a duplicate.
I think this patch should be applied to all operating systems. I think
it is just a matter of luck that other operating systems were not hit by
this bug.
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