libavformat/matroskadec.c:891: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 891, column 24 is not reachable after line 891, column 13.

libavformat/matroskadec.c:874:1: start of procedure matroska_decode_buffer()
872. }
873. 
874. static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
     ^
875.                                   MatroskaTrack *track)
876. {

libavformat/matroskadec.c:877:5: 
875.                                   MatroskaTrack *track)
876. {
877.     MatroskaTrackEncoding *encodings = track->encodings.elem;
         ^
878.     uint8_t* data = *buf;
879.     int isize = *buf_size;

libavformat/matroskadec.c:878:5: 
876. {
877.     MatroskaTrackEncoding *encodings = track->encodings.elem;
878.     uint8_t* data = *buf;
         ^
879.     int isize = *buf_size;
880.     uint8_t* pkt_data = NULL;

libavformat/matroskadec.c:879:5: 
877.     MatroskaTrackEncoding *encodings = track->encodings.elem;
878.     uint8_t* data = *buf;
879.     int isize = *buf_size;
         ^
880.     uint8_t* pkt_data = NULL;
881.     int pkt_size = isize;

libavformat/matroskadec.c:880:5: 
878.     uint8_t* data = *buf;
879.     int isize = *buf_size;
880.     uint8_t* pkt_data = NULL;
         ^
881.     int pkt_size = isize;
882.     int result = 0;

libavformat/matroskadec.c:881:5: 
879.     int isize = *buf_size;
880.     uint8_t* pkt_data = NULL;
881.     int pkt_size = isize;
         ^
882.     int result = 0;
883.     int olen;

libavformat/matroskadec.c:882:5: 
880.     uint8_t* pkt_data = NULL;
881.     int pkt_size = isize;
882.     int result = 0;
         ^
883.     int olen;
884. 

libavformat/matroskadec.c:885:5: 
883.     int olen;
884. 
885.     switch (encodings[0].compression.algo) {
         ^
886.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
887.         return encodings[0].compression.settings.size;

libavformat/matroskadec.c:886:5: Switch condition is false. Skipping switch case
884. 
885.     switch (encodings[0].compression.algo) {
886.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
         ^
887.         return encodings[0].compression.settings.size;
888.     case MATROSKA_TRACK_ENCODING_COMP_LZO:

libavformat/matroskadec.c:888:5: Switch condition is true. Entering switch case
886.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
887.         return encodings[0].compression.settings.size;
888.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
         ^
889.         do {
890.             olen = pkt_size *= 3;

libavformat/matroskadec.c:890:13: 
888.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
889.         do {
890.             olen = pkt_size *= 3;
                 ^
891.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
892.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);

libavformat/matroskadec.c:891:13: 
889.         do {
890.             olen = pkt_size *= 3;
891.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
                 ^
892.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
893.         } 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:892:13: Skipping av_lzo1x_decode(): empty list of specs
890.             olen = pkt_size *= 3;
891.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
892.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
                 ^
893.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
894.         if (result)

libavformat/matroskadec.c:893:18: Loop condition is true. Entering loop body
891.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
892.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
893.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
                      ^
894.         if (result)
895.             goto failed;

libavformat/matroskadec.c:893:48: Loop condition is true. Entering loop body
891.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
892.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
893.         } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
                                                    ^
894.         if (result)
895.             goto failed;

libavformat/matroskadec.c:890:13: 
888.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
889.         do {
890.             olen = pkt_size *= 3;
                 ^
891.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
892.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);

libavformat/matroskadec.c:891:13: 
889.         do {
890.             olen = pkt_size *= 3;
891.             pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
                 ^
892.             result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
893.         } 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)
