Simon King wrote:
> Dear Sage support,
>
> since a couple of hours I am fighting with a segmentation fault in a
> Cython module. Can you help me?
>
> I can boil it down to the following files:
>
> 1. Ccrash.h:
> typedef unsigned char FEL;
> typedef FEL *PTR;
> typedef struct
> {
> long i;
> long m;
> } piv_t;
> piv_t *_zfindpiv_(PTR row);
>
>
> 2. Ccrash.c:
> #include "Ccrash.h"
> piv_t *_zfindpiv_(PTR row)
> {
> piv_t *P;
> P->i=0;
> P->m=0;
> return P;
> }
It looks like you are never allocating the actual piv_t struct that P is
supposed to point to. You are just creating the pointer P and then
assigning directly to it.
Shouldn't you have something like
piv_t *P = malloc(sizeof(piv_t));
You'll also probably want to be careful about deallocating that memory
sometime to prevent a leak.
Jason
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