libavcodec/h264_mvpred.h:672: error: Buffer Overrun L1
  Offset: -9 Size: 40.

libavcodec/h264_mvpred.h:439:1: <Length trace>
437. }
438. 
439. static void fill_decode_caches(H264Context *h, int mb_type)
     ^
440. {
441.     int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];

libavcodec/h264_mvpred.h:439:1: Parameter `h->mv_cache[*][*]`
437. }
438. 
439. static void fill_decode_caches(H264Context *h, int mb_type)
     ^
440. {
441.     int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];

libavcodec/h264_mvpred.h:606:13: Assignment
604.             int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
605.             int8_t *ref       = h->cur_pic.ref_index[list];
606.             int16_t(*mv_cache)[2] = &h->mv_cache[list][scan8[0]];
                 ^
607.             int16_t(*mv)[2]       = h->cur_pic.motion_val[list];
608.             if (!USES_LIST(mb_type, list))

libavcodec/h264_mvpred.h:672:21: Array access: Offset: -9 Size: 40
670.                                       (h->topleft_partition & 2 * b_stride);
671.                     const int b8_xy = 4 * topleft_xy + 1 + (h->topleft_partition & 2);
672.                     AV_COPY32(mv_cache[-1 - 1 * 8], mv[b_xy]);
                         ^
673.                     ref_cache[-1 - 1 * 8] = ref[b8_xy];
674.                 } else {
