libavcodec/h264.c:7667: error: Buffer Overrun L3
  Offset: [-1, +oo] Size: 16 by call to `execute_decode_slices`.

libavcodec/h264.c:7483:5: Assignment
7481.     int buf_index=0;
7482.     H264Context *hx; ///< thread context
7483.     int context_count = 0;
          ^
7484.     int next_avc= h->is_avc ? 0 : buf_size;
7485. 

libavcodec/h264.c:7667:13: Call
7665. 
7666.         if(context_count == h->max_contexts) {
7667.             execute_decode_slices(h, context_count);
                  ^
7668.             context_count = 0;
7669.         }

libavcodec/h264.c:7444:1: <Offset trace>
7442.  * @param context_count number of contexts to execute
7443.  */
7444. static void execute_decode_slices(H264Context *h, int context_count){
      ^
7445.     MpegEncContext * const s = &h->s;
7446.     AVCodecContext * const avctx= s->avctx;

libavcodec/h264.c:7444:1: Parameter `context_count`
  7442.  * @param context_count number of contexts to execute
  7443.  */
  7444. static void execute_decode_slices(H264Context *h, int context_count){
        ^
  7445.     MpegEncContext * const s = &h->s;
  7446.     AVCodecContext * const avctx= s->avctx;

libavcodec/h264.c:7444:1: <Length trace>
7442.  * @param context_count number of contexts to execute
7443.  */
7444. static void execute_decode_slices(H264Context *h, int context_count){
      ^
7445.     MpegEncContext * const s = &h->s;
7446.     AVCodecContext * const avctx= s->avctx;

libavcodec/h264.c:7444:1: Parameter `h->thread_context[*]`
  7442.  * @param context_count number of contexts to execute
  7443.  */
  7444. static void execute_decode_slices(H264Context *h, int context_count){
        ^
  7445.     MpegEncContext * const s = &h->s;
  7446.     AVCodecContext * const avctx= s->avctx;

libavcodec/h264.c:7467:14: Array access: Offset: [-1, +oo] Size: 16 by call to `execute_decode_slices` 
  7465. 
  7466.         /* pull back stuff from slices to master context */
  7467.         hx = h->thread_context[context_count - 1];
                     ^
  7468.         s->mb_x = hx->s.mb_x;
  7469.         s->mb_y = hx->s.mb_y;
