libavformat/rdt.c:283: error: Null Dereference
  pointer `rdt` last assigned on line 280 could be null and is dereferenced at line 283, column 5.

libavformat/rdt.c:277:1: start of procedure rdt_new_extradata()
275. }
276. 
277. static void *
     ^
278. rdt_new_extradata (void)
279. {

libavformat/rdt.c:280:5: 
278. rdt_new_extradata (void)
279. {
280.     rdt_data *rdt = av_mallocz(sizeof(rdt_data));
         ^
281. 
282.     av_open_input_stream(&rdt->rmctx, NULL, "", &rdt_demuxer, NULL);

libavutil/mem.c:132:1: start of procedure av_mallocz()
  130. }
  131. 
  132. void *av_mallocz(unsigned int size)
       ^
  133. {
  134.     void *ptr = av_malloc(size);

libavutil/mem.c:134:5: 
  132. void *av_mallocz(unsigned int size)
  133. {
  134.     void *ptr = av_malloc(size);
           ^
  135.     if (ptr)
  136.         memset(ptr, 0, size);

libavutil/mem.c:42:1: start of procedure av_malloc()
    40.    linker will do it automatically */
    41. 
    42. void *av_malloc(unsigned int size)
        ^
    43. {
    44.     void *ptr;

libavutil/mem.c:50:8: Taking false branch
    48. 
    49.     /* let's disallow possible ambiguous cases */
    50.     if(size > (INT_MAX-16) )
               ^
    51.         return NULL;
    52. 

libavutil/mem.c:61:5: Skipping memalign(): method has no implementation
    59.     ((char*)ptr)[-1]= diff;
    60. #elif defined (HAVE_MEMALIGN)
    61.     ptr = memalign(16,size);
            ^
    62.     /* Why 64?
    63.        Indeed, we should align it:

libavutil/mem.c:91:5: 
    89.     ptr = malloc(size);
    90. #endif
    91.     return ptr;
            ^
    92. }
    93. 

libavutil/mem.c:92:1: return from a call to av_malloc
    90. #endif
    91.     return ptr;
    92. }
        ^
    93. 
    94. void *av_realloc(void *ptr, unsigned int size)

libavutil/mem.c:135:9: Taking false branch
  133. {
  134.     void *ptr = av_malloc(size);
  135.     if (ptr)
               ^
  136.         memset(ptr, 0, size);
  137.     return ptr;

libavutil/mem.c:137:5: 
  135.     if (ptr)
  136.         memset(ptr, 0, size);
  137.     return ptr;
           ^
  138. }
  139. 

libavutil/mem.c:138:1: return from a call to av_mallocz
  136.         memset(ptr, 0, size);
  137.     return ptr;
  138. }
       ^
  139. 
  140. char *av_strdup(const char *s)

libavformat/rdt.c:282:5: Skipping av_open_input_stream(): empty list of specs
280.     rdt_data *rdt = av_mallocz(sizeof(rdt_data));
281. 
282.     av_open_input_stream(&rdt->rmctx, NULL, "", &rdt_demuxer, NULL);
         ^
283.     rdt->prev_ts = -1;
284.     rdt->prev_sn = -1;

libavformat/rdt.c:283:5: 
281. 
282.     av_open_input_stream(&rdt->rmctx, NULL, "", &rdt_demuxer, NULL);
283.     rdt->prev_ts = -1;
         ^
284.     rdt->prev_sn = -1;
285. 

static void *
rdt_new_extradata (void)
{
    rdt_data *rdt = av_mallocz(sizeof(rdt_data));
    av_open_input_stream(&rdt->rmctx, NULL, "", &rdt_demuxer, NULL);
    rdt->prev_ts = -1;
    rdt->prev_sn = -1;
    return rdt;
}
['static void *\nrdt_new_extradata (void)\n{\n    rdt_data *rdt = av_mallocz(sizeof(rdt_data));\n    av_open_input_stream(&rdt->rmctx, NULL, "", &rdt_demuxer, NULL);\n    rdt->prev_ts = -1;\n    rdt->prev_sn = -1;\n    return rdt;\n}', 'void *av_mallocz(unsigned int size)\n{\n    void *ptr = av_malloc(size);\n    if (ptr)\n        memset(ptr, 0, size);\n    return ptr;\n}', 'void *av_malloc(unsigned int size)\n{\n    void *ptr;\n#ifdef CONFIG_MEMALIGN_HACK\n    long diff;\n#endif\n    if(size > (INT_MAX-16) )\n        return NULL;\n#ifdef CONFIG_MEMALIGN_HACK\n    ptr = malloc(size+16);\n    if(!ptr)\n        return ptr;\n    diff= ((-(long)ptr - 1)&15) + 1;\n    ptr = (char*)ptr + diff;\n    ((char*)ptr)[-1]= diff;\n#elif defined (HAVE_MEMALIGN)\n    ptr = memalign(16,size);\n#else\n    ptr = malloc(size);\n#endif\n    return ptr;\n}']