libavformat/matroskadec.c:898: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 898, column 24 is not reachable after line 898, column 13.

libavformat/matroskadec.c:881:1: start of procedure matroska_decode_buffer()
879. }
880. 
881. static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
     ^
882.                                   MatroskaTrack *track)
883. {

libavformat/matroskadec.c:884:5: 
882.                                   MatroskaTrack *track)
883. {
884.     MatroskaTrackEncoding *encodings = track->encodings.elem;
         ^
885.     uint8_t* data = *buf;
886.     int isize = *buf_size;

libavformat/matroskadec.c:885:5: 
883. {
884.     MatroskaTrackEncoding *encodings = track->encodings.elem;
885.     uint8_t* data = *buf;
         ^
886.     int isize = *buf_size;
887.     uint8_t* pkt_data = NULL;

libavformat/matroskadec.c:886:5: 
884.     MatroskaTrackEncoding *encodings = track->encodings.elem;
885.     uint8_t* data = *buf;
886.     int isize = *buf_size;
         ^
887.     uint8_t* pkt_data = NULL;
888.     int pkt_size = isize;

libavformat/matroskadec.c:887:5: 
885.     uint8_t* data = *buf;
886.     int isize = *buf_size;
887.     uint8_t* pkt_data = NULL;
         ^
888.     int pkt_size = isize;
889.     int result = 0;

libavformat/matroskadec.c:888:5: 
886.     int isize = *buf_size;
887.     uint8_t* pkt_data = NULL;
888.     int pkt_size = isize;
         ^
889.     int result = 0;
890.     int olen;

libavformat/matroskadec.c:889:5: 
887.     uint8_t* pkt_data = NULL;
888.     int pkt_size = isize;
889.     int result = 0;
         ^
890.     int olen;
891. 

libavformat/matroskadec.c:892:5: 
890.     int olen;
891. 
892.     switch (encodings[0].compression.algo) {
         ^
893.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
894.         return encodings[0].compression.settings.size;

libavformat/matroskadec.c:893:5: Switch condition is false. Skipping switch case
891. 
892.     switch (encodings[0].compression.algo) {
893.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
         ^
894.         return encodings[0].compression.settings.size;
895.     case MATROSKA_TRACK_ENCODING_COMP_LZO:

libavformat/matroskadec.c:895:5: Switch condition is true. Entering switch case
893.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
894.         return encodings[0].compression.settings.size;
895.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
         ^
896.         do {
897.             olen = pkt_size *= 3;

libavformat/matroskadec.c:897:13: 
895.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
896.         do {
897.             olen = pkt_size *= 3;
                 ^
898.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
899.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);

libavformat/matroskadec.c:898:13: 
896.         do {
897.             olen = pkt_size *= 3;
898.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
                 ^
899.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
900.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);

libavutil/mem.c:119:1: start of procedure av_realloc()
  117. }
  118. 
  119. void *av_realloc(void *ptr, unsigned int size)
       ^
  120. {
  121. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:126:8: Taking false branch
  124. 
  125.     /* let's disallow possible ambiguous cases */
  126.     if(size > (INT_MAX-16) )
              ^
  127.         return NULL;
  128. 

libavutil/mem.c:135:5: 
  133.     return (char*)realloc((char*)ptr - diff, size + diff) + diff;
  134. #else
  135.     return realloc(ptr, size);
           ^
  136. #endif
  137. }

libavutil/mem.c:137:1: return from a call to av_realloc
  135.     return realloc(ptr, size);
  136. #endif
  137. }
       ^
  138. 
  139. void av_free(void *ptr)

libavformat/matroskadec.c:899:13: Skipping av_lzo1x_decode(): empty list of specs
897.             olen = pkt_size *= 3;
898.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
899.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
                 ^
900.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
901.         if (result)

libavformat/matroskadec.c:900:18: Loop condition is true. Entering loop body
898.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
899.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
900.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
                      ^
901.         if (result)
902.             goto failed;

libavformat/matroskadec.c:900:48: Loop condition is true. Entering loop body
898.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
899.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
900.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
                                                    ^
901.         if (result)
902.             goto failed;

libavformat/matroskadec.c:897:13: 
895.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
896.         do {
897.             olen = pkt_size *= 3;
                 ^
898.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
899.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);

libavformat/matroskadec.c:898:13: 
896.         do {
897.             olen = pkt_size *= 3;
898.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
                 ^
899.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
900.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);

libavutil/mem.c:119:1: start of procedure av_realloc()
  117. }
  118. 
  119. void *av_realloc(void *ptr, unsigned int size)
       ^
  120. {
  121. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:126:8: Taking true branch
  124. 
  125.     /* let's disallow possible ambiguous cases */
  126.     if(size > (INT_MAX-16) )
              ^
  127.         return NULL;
  128. 

libavutil/mem.c:127:9: 
  125.     /* let's disallow possible ambiguous cases */
  126.     if(size > (INT_MAX-16) )
  127.         return NULL;
               ^
  128. 
  129. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:137:1: return from a call to av_realloc
  135.     return realloc(ptr, size);
  136. #endif
  137. }
       ^
  138. 
  139. void av_free(void *ptr)
