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:391:1: start of procedure init_get_bits()
  389.  * responsible for checking for the buffer end yourself (take advantage of the padding)!
  390.  */
  391. static inline void init_get_bits(GetBitContext *s,
       ^
  392.                    const uint8_t *buffer, int bit_size)
  393. {

libavcodec/get_bits.h:394:5: 
  392.                    const uint8_t *buffer, int bit_size)
  393. {
  394.     int buffer_size = (bit_size+7)>>3;
           ^
  395.     if (buffer_size < 0 || bit_size < 0) {
  396.         buffer_size = bit_size = 0;

libavcodec/get_bits.h:395:9: Taking true branch
  393. {
  394.     int buffer_size = (bit_size+7)>>3;
  395.     if (buffer_size < 0 || bit_size < 0) {
               ^
  396.         buffer_size = bit_size = 0;
  397.         buffer = NULL;

libavcodec/get_bits.h:396:9: 
  394.     int buffer_size = (bit_size+7)>>3;
  395.     if (buffer_size < 0 || bit_size < 0) {
  396.         buffer_size = bit_size = 0;
               ^
  397.         buffer = NULL;
  398.     }

libavcodec/get_bits.h:397:9: 
  395.     if (buffer_size < 0 || bit_size < 0) {
  396.         buffer_size = bit_size = 0;
  397.         buffer = NULL;
               ^
  398.     }
  399. 

libavcodec/get_bits.h:400:5: 
  398.     }
  399. 
  400.     s->buffer       = buffer;
           ^
  401.     s->size_in_bits = bit_size;
  402.     s->buffer_end   = buffer + buffer_size;

libavcodec/get_bits.h:401:5: 
  399. 
  400.     s->buffer       = buffer;
  401.     s->size_in_bits = bit_size;
           ^
  402.     s->buffer_end   = buffer + buffer_size;
  403. #ifdef ALT_BITSTREAM_READER

libavcodec/get_bits.h:402:5: 
  400.     s->buffer       = buffer;
  401.     s->size_in_bits = bit_size;
  402.     s->buffer_end   = buffer + buffer_size;
           ^
  403. #ifdef ALT_BITSTREAM_READER
  404.     s->index        = 0;

libavcodec/get_bits.h:404:5: 
  402.     s->buffer_end   = buffer + buffer_size;
  403. #ifdef ALT_BITSTREAM_READER
  404.     s->index        = 0;
           ^
  405. #elif defined A32_BITSTREAM_READER
  406.     s->buffer_ptr   = (uint32_t*)((intptr_t)buffer & ~3);

libavcodec/get_bits.h:410:1: return from a call to init_get_bits
  408.     skip_bits_long(s, 0);
  409. #endif
  410. }
       ^
  411. 
  412. 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:311:1: start of procedure get_bits1()
  309. }
  310. 
  311. static inline unsigned int get_bits1(GetBitContext *s){
       ^
  312. #ifdef ALT_BITSTREAM_READER
  313.     unsigned int index = s->index;

libavcodec/get_bits.h:313:5: 
  311. static inline unsigned int get_bits1(GetBitContext *s){
  312. #ifdef ALT_BITSTREAM_READER
  313.     unsigned int index = s->index;
           ^
  314.     uint8_t result = s->buffer[index>>3];
  315. #ifdef ALT_BITSTREAM_READER_LE

libavcodec/get_bits.h:314:5: 
  312. #ifdef ALT_BITSTREAM_READER
  313.     unsigned int index = s->index;
  314.     uint8_t result = s->buffer[index>>3];
           ^
  315. #ifdef ALT_BITSTREAM_READER_LE
  316.     result >>= index & 7;
