libavcodec/ra288.c:245: error: Null Dereference
  pointer `&gb->buffer` last assigned on line 242 could be null and is dereferenced by call to `get_bits()` at line 245, column 31.

libavcodec/ra288.c:226:1: start of procedure ra288_decode_frame()
224. }
225. 
226. static int ra288_decode_frame(AVCodecContext * avctx, void *data,
     ^
227.                               int *data_size, const uint8_t * buf,
228.                               int buf_size)

libavcodec/ra288.c:230:5: 
228.                               int buf_size)
229. {
230.     int16_t *out = data;
         ^
231.     int i, j;
232.     RA288Context *ractx = avctx->priv_data;

libavcodec/ra288.c:232:5: 
230.     int16_t *out = data;
231.     int i, j;
232.     RA288Context *ractx = avctx->priv_data;
         ^
233.     GetBitContext gb;
234. 

libavcodec/ra288.c:235:9: Taking false branch
233.     GetBitContext gb;
234. 
235.     if (buf_size < avctx->block_align) {
             ^
236.         av_log(avctx, AV_LOG_ERROR,
237.                "Error! Input buffer is too small [%d<%d]\n",

libavcodec/ra288.c:242:5: 
240.     }
241. 
242.     init_get_bits(&gb, buf, avctx->block_align * 8);
         ^
243. 
244.     for (i=0; i < 32; i++) {

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/ra288.c:244:10: 
242.     init_get_bits(&gb, buf, avctx->block_align * 8);
243. 
244.     for (i=0; i < 32; i++) {
              ^
245.         float gain = amptable[get_bits(&gb, 3)];
246.         int cb_coef = get_bits(&gb, 6 + (i&1));

libavcodec/ra288.c:244:15: Loop condition is true. Entering loop body
242.     init_get_bits(&gb, buf, avctx->block_align * 8);
243. 
244.     for (i=0; i < 32; i++) {
                   ^
245.         float gain = amptable[get_bits(&gb, 3)];
246.         int cb_coef = get_bits(&gb, 6 + (i&1));

libavcodec/ra288.c:245:9: 
243. 
244.     for (i=0; i < 32; i++) {
245.         float gain = amptable[get_bits(&gb, 3)];
             ^
246.         int cb_coef = get_bits(&gb, 6 + (i&1));
247. 

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)
