libavcodec/flac.c:153: error: Null Dereference
  pointer `&gb->buffer` last assigned on line 150 could be null and is dereferenced by call to `get_bits()` at line 153, column 24.

libavcodec/flac.c:146:1: start of procedure ff_flac_parse_streaminfo()
144. }
145. 
146. void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
     ^
147.                               const uint8_t *buffer)
148. {

libavcodec/flac.c:150:5: 
148. {
149.     GetBitContext gb;
150.     init_get_bits(&gb, buffer, FLAC_STREAMINFO_SIZE*8);
         ^
151. 
152.     /* mandatory streaminfo */

libavcodec/bitstream.h:719:1: start of procedure init_get_bits()
  717.  * @param bit_size the size of the buffer in bits
  718.  */
  719. static inline void init_get_bits(GetBitContext *s,
       ^
  720.                    const uint8_t *buffer, int bit_size)
  721. {

libavcodec/bitstream.h:722:5: 
  720.                    const uint8_t *buffer, int bit_size)
  721. {
  722.     int buffer_size= (bit_size+7)>>3;
           ^
  723.     if(buffer_size < 0 || bit_size < 0) {
  724.         buffer_size = bit_size = 0;

libavcodec/bitstream.h:723:8: Taking true branch
  721. {
  722.     int buffer_size= (bit_size+7)>>3;
  723.     if(buffer_size < 0 || bit_size < 0) {
              ^
  724.         buffer_size = bit_size = 0;
  725.         buffer = NULL;

libavcodec/bitstream.h:724:9: 
  722.     int buffer_size= (bit_size+7)>>3;
  723.     if(buffer_size < 0 || bit_size < 0) {
  724.         buffer_size = bit_size = 0;
               ^
  725.         buffer = NULL;
  726.     }

libavcodec/bitstream.h:725:9: 
  723.     if(buffer_size < 0 || bit_size < 0) {
  724.         buffer_size = bit_size = 0;
  725.         buffer = NULL;
               ^
  726.     }
  727. 

libavcodec/bitstream.h:728:5: 
  726.     }
  727. 
  728.     s->buffer= buffer;
           ^
  729.     s->size_in_bits= bit_size;
  730.     s->buffer_end= buffer + buffer_size;

libavcodec/bitstream.h:729:5: 
  727. 
  728.     s->buffer= buffer;
  729.     s->size_in_bits= bit_size;
           ^
  730.     s->buffer_end= buffer + buffer_size;
  731. #ifdef ALT_BITSTREAM_READER

libavcodec/bitstream.h:730:5: 
  728.     s->buffer= buffer;
  729.     s->size_in_bits= bit_size;
  730.     s->buffer_end= buffer + buffer_size;
           ^
  731. #ifdef ALT_BITSTREAM_READER
  732.     s->index=0;

libavcodec/bitstream.h:732:5: 
  730.     s->buffer_end= buffer + buffer_size;
  731. #ifdef ALT_BITSTREAM_READER
  732.     s->index=0;
           ^
  733. #elif defined LIBMPEG2_BITSTREAM_READER
  734.     s->buffer_ptr = (uint8_t*)((intptr_t)buffer&(~1));

libavcodec/bitstream.h:742:1: return from a call to init_get_bits
  740.     skip_bits_long(s, 0);
  741. #endif
  742. }
       ^
  743. 
  744. static inline void align_get_bits(GetBitContext *s)

libavcodec/flac.c:153:5: 
151. 
152.     /* mandatory streaminfo */
153.     s->min_blocksize = get_bits(&gb, 16);
         ^
154.     s->max_blocksize = get_bits(&gb, 16);
155. 

libavcodec/bitstream.h:616:1: start of procedure get_bits()
  614.  * Note, the alt bitstream reader can read up to 25 bits, but the libmpeg2 reader can't
  615.  */
  616. static inline unsigned int get_bits(GetBitContext *s, int n){
       ^
  617.     register int tmp;
  618.     OPEN_READER(re, s)

libavcodec/bitstream.h:618:5: 
  616. static inline unsigned int get_bits(GetBitContext *s, int n){
  617.     register int tmp;
  618.     OPEN_READER(re, s)
           ^
  619.     UPDATE_CACHE(re, s)
  620.     tmp= SHOW_UBITS(re, s, n);

libavcodec/bitstream.h:619:5: 
  617.     register int tmp;
  618.     OPEN_READER(re, s)
  619.     UPDATE_CACHE(re, s)
           ^
  620.     tmp= SHOW_UBITS(re, s, n);
  621.     LAST_SKIP_BITS(re, s, n)
