libavcodec/xan.c:111: error: Null Dereference
  pointer `&gb->buffer` last assigned on line 108 could be null and is dereferenced by call to `get_bits1()` at line 111, column 32.

libavcodec/xan.c:98:1: start of procedure xan_huffman_decode()
 96. }
 97. 
 98. static int xan_huffman_decode(unsigned char *dest, const unsigned char *src,
     ^
 99.     int dest_len)
100. {

libavcodec/xan.c:101:5: 
 99.     int dest_len)
100. {
101.     unsigned char byte = *src++;
         ^
102.     unsigned char ival = byte + 0x16;
103.     const unsigned char * ptr = src + byte*2;

libavcodec/xan.c:102:5: 
100. {
101.     unsigned char byte = *src++;
102.     unsigned char ival = byte + 0x16;
         ^
103.     const unsigned char * ptr = src + byte*2;
104.     unsigned char val = ival;

libavcodec/xan.c:103:5: 
101.     unsigned char byte = *src++;
102.     unsigned char ival = byte + 0x16;
103.     const unsigned char * ptr = src + byte*2;
         ^
104.     unsigned char val = ival;
105.     unsigned char *dest_end = dest + dest_len;

libavcodec/xan.c:104:5: 
102.     unsigned char ival = byte + 0x16;
103.     const unsigned char * ptr = src + byte*2;
104.     unsigned char val = ival;
         ^
105.     unsigned char *dest_end = dest + dest_len;
106.     GetBitContext gb;

libavcodec/xan.c:105:5: 
103.     const unsigned char * ptr = src + byte*2;
104.     unsigned char val = ival;
105.     unsigned char *dest_end = dest + dest_len;
         ^
106.     GetBitContext gb;
107. 

libavcodec/xan.c:108:5: 
106.     GetBitContext gb;
107. 
108.     init_get_bits(&gb, ptr, 0); // FIXME: no src size available
         ^
109. 
110.     while ( val != 0x16 ) {

libavcodec/get_bits.h:473:1: start of procedure init_get_bits()
  471.  * responsible for checking for the buffer end yourself (take advantage of the padding)!
  472.  */
  473. static inline void init_get_bits(GetBitContext *s,
       ^
  474.                    const uint8_t *buffer, int bit_size)
  475. {

libavcodec/get_bits.h:476:5: 
  474.                    const uint8_t *buffer, int bit_size)
  475. {
  476.     int buffer_size= (bit_size+7)>>3;
           ^
  477.     if(buffer_size < 0 || bit_size < 0) {
  478.         buffer_size = bit_size = 0;

libavcodec/get_bits.h:477:8: Taking true branch
  475. {
  476.     int buffer_size= (bit_size+7)>>3;
  477.     if(buffer_size < 0 || bit_size < 0) {
              ^
  478.         buffer_size = bit_size = 0;
  479.         buffer = NULL;

libavcodec/get_bits.h:478:9: 
  476.     int buffer_size= (bit_size+7)>>3;
  477.     if(buffer_size < 0 || bit_size < 0) {
  478.         buffer_size = bit_size = 0;
               ^
  479.         buffer = NULL;
  480.     }

libavcodec/get_bits.h:479:9: 
  477.     if(buffer_size < 0 || bit_size < 0) {
  478.         buffer_size = bit_size = 0;
  479.         buffer = NULL;
               ^
  480.     }
  481. 

libavcodec/get_bits.h:482:5: 
  480.     }
  481. 
  482.     s->buffer= buffer;
           ^
  483.     s->size_in_bits= bit_size;
  484.     s->buffer_end= buffer + buffer_size;

libavcodec/get_bits.h:483:5: 
  481. 
  482.     s->buffer= buffer;
  483.     s->size_in_bits= bit_size;
           ^
  484.     s->buffer_end= buffer + buffer_size;
  485. #ifdef ALT_BITSTREAM_READER

libavcodec/get_bits.h:484:5: 
  482.     s->buffer= buffer;
  483.     s->size_in_bits= bit_size;
  484.     s->buffer_end= buffer + buffer_size;
           ^
  485. #ifdef ALT_BITSTREAM_READER
  486.     s->index=0;

libavcodec/get_bits.h:486:5: 
  484.     s->buffer_end= buffer + buffer_size;
  485. #ifdef ALT_BITSTREAM_READER
  486.     s->index=0;
           ^
  487. #elif defined LIBMPEG2_BITSTREAM_READER
  488.     s->buffer_ptr = (uint8_t*)((intptr_t)buffer&(~1));

libavcodec/get_bits.h:496:1: return from a call to init_get_bits
  494.     skip_bits_long(s, 0);
  495. #endif
  496. }
       ^
  497. 
  498. static inline void align_get_bits(GetBitContext *s)

libavcodec/xan.c:110:13: Loop condition is true. Entering loop body
108.     init_get_bits(&gb, ptr, 0); // FIXME: no src size available
109. 
110.     while ( val != 0x16 ) {
                 ^
111.         val = src[val - 0x17 + get_bits1(&gb) * byte];
112. 

libavcodec/xan.c:111:9: 
109. 
110.     while ( val != 0x16 ) {
111.         val = src[val - 0x17 + get_bits1(&gb) * byte];
             ^
112. 
113.         if ( val < 0x16 ) {

libavcodec/get_bits.h:393:1: start of procedure get_bits1()
  391. }
  392. 
  393. static inline unsigned int get_bits1(GetBitContext *s){
       ^
  394. #ifdef ALT_BITSTREAM_READER
  395.     unsigned int index= s->index;

libavcodec/get_bits.h:395:5: 
  393. static inline unsigned int get_bits1(GetBitContext *s){
  394. #ifdef ALT_BITSTREAM_READER
  395.     unsigned int index= s->index;
           ^
  396.     uint8_t result= s->buffer[ index>>3 ];
  397. #ifdef ALT_BITSTREAM_READER_LE

libavcodec/get_bits.h:396:5: 
  394. #ifdef ALT_BITSTREAM_READER
  395.     unsigned int index= s->index;
  396.     uint8_t result= s->buffer[ index>>3 ];
           ^
  397. #ifdef ALT_BITSTREAM_READER_LE
  398.     result>>= (index&0x07);
