libavcodec/opus_celt.c:2057: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `opus_getrawbits`.

libavcodec/opus_celt.c:2054:5: Call
2052.     celt_decode_allocation   (s, rc);
2053.     celt_decode_fine_energy  (s, rc);
2054.     celt_decode_bands        (s, rc);
          ^
2055. 
2056.     if (s->anticollapse_bit)

libavcodec/opus_celt.c:1879:1: Parameter `rc->rb.cachelen`
  1877. }
  1878. 
  1879. static void celt_decode_bands(CeltContext *s, OpusRangeCoder *rc)
        ^
  1880. {
  1881.     float lowband_scratch[8 * 22];

libavcodec/opus_celt.c:2057:24: Call
2055. 
2056.     if (s->anticollapse_bit)
2057.         anticollapse = opus_getrawbits(rc, 1);
                             ^
2058. 
2059.     celt_decode_final_energy(s, rc, s->framebits - opus_rc_tell(rc));

libavcodec/opus.h:265:1: <LHS trace>
263.  * CELT: read 1-25 raw bits at the end of the frame, backwards byte-wise
264.  */
265. static av_always_inline unsigned int opus_getrawbits(OpusRangeCoder *rc, unsigned int count)
     ^
266. {
267.     unsigned int value = 0;

libavcodec/opus.h:265:1: Parameter `count`
  263.  * CELT: read 1-25 raw bits at the end of the frame, backwards byte-wise
  264.  */
  265. static av_always_inline unsigned int opus_getrawbits(OpusRangeCoder *rc, unsigned int count)
       ^
  266. {
  267.     unsigned int value = 0;

libavcodec/opus.h:265:1: <RHS trace>
263.  * CELT: read 1-25 raw bits at the end of the frame, backwards byte-wise
264.  */
265. static av_always_inline unsigned int opus_getrawbits(OpusRangeCoder *rc, unsigned int count)
     ^
266. {
267.     unsigned int value = 0;

libavcodec/opus.h:265:1: Parameter `count`
  263.  * CELT: read 1-25 raw bits at the end of the frame, backwards byte-wise
  264.  */
  265. static av_always_inline unsigned int opus_getrawbits(OpusRangeCoder *rc, unsigned int count)
       ^
  266. {
  267.     unsigned int value = 0;

libavcodec/opus.h:277:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `opus_getrawbits` 
  275.     value = rc->rb.cacheval & ((1<<count)-1);
  276.     rc->rb.cacheval    >>= count;
  277.     rc->rb.cachelen     -= count;
           ^
  278.     rc->total_read_bits += count;
  279. 
