[LARTC] Segmentation fault

[Fatih Düzova]

Hi,
I have a small question about tc's source code. I m trying to compile
the code by itself, and for this purpose i ve created a big .c file
that includes all the sources it uses. the reason behind this  to make
a small modification for my school project.
But whenever I try to do "tc qdisc add ..." or "tc class add..", it
gives the error segmentation fault, and it gives this error in this
code section of tc_qdisc_modify function:

if (q->parse_qopt(q, argc, argv, &req.n))

I could not find why this error has occured for 3 days. I would
appreciate, if you could help me or suggest something.