libavcodec/vp6.c:457: error: Buffer Overrun L1
  Offset: [5, +oo] (⇐ [0, +oo] + 5) Size: 2.

libavcodec/vp6.c:424:1: <Length trace>
422. }
423. 
424. static void vp6_parse_coeff(VP56Context *s)
     ^
425. {
426.     VP56RangeCoder *c = s->ccp;

libavcodec/vp6.c:424:1: Parameter `s->modelp->coeff_dccv[*]`
422. }
423. 
424. static void vp6_parse_coeff(VP56Context *s)
     ^
425. {
426.     VP56RangeCoder *c = s->ccp;

libavcodec/vp6.c:442:9: Assignment
440.         ctx = s->left_block[ff_vp56_b6to4[b]].not_null_dc
441.               + s->above_blocks[s->above_block_idx[b]].not_null_dc;
442.         model1 = model->coeff_dccv[pt];
             ^
443.         model2 = model->coeff_dcct[pt][ctx];
444. 

libavcodec/vp6.c:457:62: Array access: Offset: [5, +oo] (⇐ [0, +oo] + 5) Size: 2
455.                     } else {
456.                         if (vp56_rac_get_prob(c, model2[4]))
457.                             coeff = 3 + vp56_rac_get_prob(c, model1[5]);
                                                                  ^
458.                         else
459.                             coeff = 2;
