libavcodec/ffv1.c:878: error: Buffer Overrun L1
  Offset: [3, `w` + 3] (⇐ [3, 4] + [0, `w` - 1]) Size: 2 by call to `decode_line`.

libavcodec/ffv1.c:856:1: Parameter `w`
854. }
855. 
856. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){
     ^
857.     int x, y;
858.     int_fast16_t sample_buffer[2][w+6];

libavcodec/ffv1.c:878:13: Call
876. //{START_TIMER
877.         if(s->avctx->bits_per_raw_sample <= 8){
878.             decode_line(s, w, sample, plane_index, 8);
                 ^
879.             for(x=0; x<w; x++){
880.                 src[x + stride*y]= sample[1][x];

libavcodec/ffv1.c:799:1: <Offset trace>
797. }
798. 
799. static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){
     ^
800.     PlaneContext * const p= &s->plane[plane_index];
801.     RangeCoder * const c= &s->c;

libavcodec/ffv1.c:799:1: Parameter `w`
  797. }
  798. 
  799. static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){
       ^
  800.     PlaneContext * const p= &s->plane[plane_index];
  801.     RangeCoder * const c= &s->c;

libavcodec/ffv1.c:799:1: <Length trace>
797. }
798. 
799. static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){
     ^
800.     PlaneContext * const p= &s->plane[plane_index];
801.     RangeCoder * const c= &s->c;

libavcodec/ffv1.c:799:1: Parameter `**sample`
  797. }
  798. 
  799. static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){
       ^
  800.     PlaneContext * const p= &s->plane[plane_index];
  801.     RangeCoder * const c= &s->c;

libavcodec/ffv1.c:851:9: Array access: Offset: [3, w + 3] (⇐ [3, 4] + [0, w - 1]) Size: 2 by call to `decode_line` 
  849.         if(sign) diff= -diff;
  850. 
  851.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);
               ^
  852.     }
  853.     s->run_index= run_index;
