libavcodec/alsdec.c:1191: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `bitstream_read_bit`.

libavcodec/alsdec.c:1183:54: Call
1181. 
1182.     while (entries < channels && !(current->stop_flag = bitstream_read_bit(bc))) {
1183.         current->master_channel = bitstream_read(bc, av_ceil_log2(channels));
                                                           ^
1184. 
1185.         if (current->master_channel >= channels) {

libavutil/common.h:229:12: Unknown value from: __builtin_clz
  227. static av_always_inline av_const int av_ceil_log2_c(int x)
  228. {
  229.     return av_log2((x - 1) << 1);
                  ^
  230. }
  231. 

libavutil/common.h:229:5: Assignment
  227. static av_always_inline av_const int av_ceil_log2_c(int x)
  228. {
  229.     return av_log2((x - 1) << 1);
           ^
  230. }
  231. 

libavcodec/alsdec.c:1183:35: Call
1181. 
1182.     while (entries < channels && !(current->stop_flag = bitstream_read_bit(bc))) {
1183.         current->master_channel = bitstream_read(bc, av_ceil_log2(channels));
                                        ^
1184. 
1185.         if (current->master_channel >= channels) {

libavcodec/bitstream.h:183:1: Parameter `bc->bits_left`
  181. 
  182. /* Return n bits from the buffer. n has to be in the 0-32 range. */
  183. static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)
       ^
  184. {
  185.     if (!n)

libavcodec/alsdec.c:1191:39: Call
1189. 
1190.         if (current->master_channel != c) {
1191.             current->time_diff_flag = bitstream_read_bit(bc);
                                            ^
1192.             current->weighting[0]   = als_weighting(bc, 1, 16);
1193.             current->weighting[1]   = als_weighting(bc, 2, 14);

libavcodec/bitstream.h:145:1: Parameter `bc->bits_left`
  143. 
  144. /* Return one bit from the buffer. */
  145. static inline unsigned bitstream_read_bit(BitstreamContext *bc)
       ^
  146. {
  147.     if (!bc->bits_left)

libavcodec/bitstream.h:150:12: Call
  148.         refill_64(bc);
  149. 
  150.     return get_val(bc, 1);
                  ^
  151. }
  152. 

libavcodec/bitstream.h:130:1: <LHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `bc->bits_left`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: <RHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `n`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:139:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `bitstream_read_bit` 
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;
