[petsc-users] segfault on MatCreateSNESMF ?

[Mark Lohry]

sorry, disregard that. I had forgotten to do TSCreate earlier.

On 05/12/2015 04:38 PM, Mark Lohry wrote:
> I'm getting a segfault when trying to set up a matrix-free solver:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00002aaaabe7b7de in MatCreateSNESMF (snes=0x0, J=0x7fffffffc340)
>     at /home/mlohry/dev/petsc-3.5.3/src/snes/mf/snesmfj.c:151
> 151      if (snes->vec_func) {
> (gdb) bt
> #0  0x00002aaaabe7b7de in MatCreateSNESMF (snes=0x0, J=0x7fffffffc340)
>     at /home/mlohry/dev/petsc-3.5.3/src/snes/mf/snesmfj.c:151
>
>
> from the line
>
>
>   SNES snes; // non-linear algebraic solver context
>   TSGetSNES(ts,&snes);
>   Mat JacMatFree=NULL;
>   MatCreateSNESMF(snes,&JacMatFree); // tell non-linear solver this is 
> matrix-free
>
>
> any idea where this could come from?