libavcodec/opus_celt.c:2123: error: Buffer Overrun L3
  Offset added: 84 Size: [0, +oo].

libavcodec/opus_celt.c:1975:1: <Length trace>
1973. }
1974. 
1975. int ff_celt_decode_frame(CeltContext *s, OpusRangeCoder *rc,
      ^
1976.                          float **output, int coded_channels, int frame_size,
1977.                          int startband,  int endband)

libavcodec/opus_celt.c:1975:1: Parameter `s->frame[*].prev_energy[*][*]`
1973. }
1974. 
1975. int ff_celt_decode_frame(CeltContext *s, OpusRangeCoder *rc,
      ^
1976.                          float **output, int coded_channels, int frame_size,
1977.                          int startband,  int endband)

libavcodec/opus_celt.c:2123:13: Array access: Offset added: 84 Size: [0, +oo]
2121. 
2122.         if (!transient) {
2123.             memcpy(frame->prev_energy[1], frame->prev_energy[0], sizeof(frame->prev_energy[0]));
                  ^
2124.             memcpy(frame->prev_energy[0], frame->energy,         sizeof(frame->prev_energy[0]));
2125.         } else {
