libavcodec/flacdec.c:481: error: Integer Overflow L2
  ([0, +oo] - 16):unsigned32 by call to `bitstream_skip`.

libavcodec/flacdec.c:478:5: Call
476.     }
477. 
478.     bitstream_align(bc);
         ^
479. 
480.     /* frame footer */

libavcodec/bitstream.h:272:1: Parameter `bc->bits_left`
  270. 
  271. /* Skip bits to a byte boundary. */
  272. static inline const uint8_t *bitstream_align(BitstreamContext *bc)
       ^
  273. {
  274.     unsigned n = -bitstream_tell(bc) & 7;

libavcodec/flacdec.c:481:5: Call
479. 
480.     /* frame footer */
481.     bitstream_skip(bc, 16); /* data crc */
         ^
482. 
483.     return 0;

libavcodec/bitstream.h:240:1: Parameter `n`
  238. 
  239. /* Skip n bits in the buffer. */
  240. static inline void bitstream_skip(BitstreamContext *bc, unsigned n)
       ^
  241. {
  242.     if (n < bc->bits_left)

libavcodec/bitstream.h:243:9: Call
  241. {
  242.     if (n < bc->bits_left)
  243.         skip_remaining(bc, n);
               ^
  244.     else {
  245.         n -= bc->bits_left;

libavcodec/bitstream.h:229:1: <LHS trace>
227. }
228. 
229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
     ^
230. {
231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: Parameter `bc->bits_left`
    227. }
    228. 
    229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
         ^
    230. {
    231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: <RHS trace>
227. }
228. 
229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
     ^
230. {
231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:229:1: Parameter `n`
    227. }
    228. 
    229. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
         ^
    230. {
    231. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:236:5: Binary operation: ([0, +oo] - 16):unsigned32 by call to `bitstream_skip` 
    234.     bc->bits <<= n;
    235. #endif
    236.     bc->bits_left -= n;
             ^
    237. }
    238. 
