libavformat/matroskadec.c:960: error: Memory Leak
  memory dynamically allocated by call to `av_realloc()` at line 960, column 24 is not reachable after line 960, column 13.

libavformat/matroskadec.c:924:1: start of procedure matroska_decode_buffer()
922. }
923. 
924. static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
     ^
925.                                   MatroskaTrack *track)
926. {

libavformat/matroskadec.c:927:5: 
925.                                   MatroskaTrack *track)
926. {
927.     MatroskaTrackEncoding *encodings = track->encodings.elem;
         ^
928.     uint8_t* data = *buf;
929.     int isize = *buf_size;

libavformat/matroskadec.c:928:5: 
926. {
927.     MatroskaTrackEncoding *encodings = track->encodings.elem;
928.     uint8_t* data = *buf;
         ^
929.     int isize = *buf_size;
930.     uint8_t* pkt_data = NULL;

libavformat/matroskadec.c:929:5: 
927.     MatroskaTrackEncoding *encodings = track->encodings.elem;
928.     uint8_t* data = *buf;
929.     int isize = *buf_size;
         ^
930.     uint8_t* pkt_data = NULL;
931.     int pkt_size = isize;

libavformat/matroskadec.c:930:5: 
928.     uint8_t* data = *buf;
929.     int isize = *buf_size;
930.     uint8_t* pkt_data = NULL;
         ^
931.     int pkt_size = isize;
932.     int result = 0;

libavformat/matroskadec.c:931:5: 
929.     int isize = *buf_size;
930.     uint8_t* pkt_data = NULL;
931.     int pkt_size = isize;
         ^
932.     int result = 0;
933.     int olen;

libavformat/matroskadec.c:932:5: 
930.     uint8_t* pkt_data = NULL;
931.     int pkt_size = isize;
932.     int result = 0;
         ^
933.     int olen;
934. 

libavformat/matroskadec.c:935:9: Taking false branch
933.     int olen;
934. 
935.     if (pkt_size >= 10000000)
             ^
936.         return -1;
937. 

libavformat/matroskadec.c:938:5: 
936.         return -1;
937. 
938.     switch (encodings[0].compression.algo) {
         ^
939.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
940.         return encodings[0].compression.settings.size;

libavformat/matroskadec.c:939:5: Switch condition is false. Skipping switch case
937. 
938.     switch (encodings[0].compression.algo) {
939.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
         ^
940.         return encodings[0].compression.settings.size;
941.     case MATROSKA_TRACK_ENCODING_COMP_LZO:

libavformat/matroskadec.c:941:5: Switch condition is false. Skipping switch case
939.     case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
940.         return encodings[0].compression.settings.size;
941.     case MATROSKA_TRACK_ENCODING_COMP_LZO:
         ^
942.         do {
943.             olen = pkt_size *= 3;

libavformat/matroskadec.c:952:5: Switch condition is true. Entering switch case
950.         break;
951. #if CONFIG_ZLIB
952.     case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
         ^
953.         z_stream zstream = {0};
954.         if (inflateInit(&zstream) != Z_OK)

libavformat/matroskadec.c:953:9: 
951. #if CONFIG_ZLIB
952.     case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
953.         z_stream zstream = {0};
             ^
954.         if (inflateInit(&zstream) != Z_OK)
955.             return -1;

libavformat/matroskadec.c:954:13: Taking false branch
952.     case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
953.         z_stream zstream = {0};
954.         if (inflateInit(&zstream) != Z_OK)
                 ^
955.             return -1;
956.         zstream.next_in = data;

libavformat/matroskadec.c:956:9: 
954.         if (inflateInit(&zstream) != Z_OK)
955.             return -1;
956.         zstream.next_in = data;
             ^
957.         zstream.avail_in = isize;
958.         do {

libavformat/matroskadec.c:957:9: 
955.             return -1;
956.         zstream.next_in = data;
957.         zstream.avail_in = isize;
             ^
958.         do {
959.             pkt_size *= 3;

libavformat/matroskadec.c:959:13: 
957.         zstream.avail_in = isize;
958.         do {
959.             pkt_size *= 3;
                 ^
960.             pkt_data = av_realloc(pkt_data, pkt_size);
961.             zstream.avail_out = pkt_size - zstream.total_out;

libavformat/matroskadec.c:960:13: 
958.         do {
959.             pkt_size *= 3;
960.             pkt_data = av_realloc(pkt_data, pkt_size);
                 ^
961.             zstream.avail_out = pkt_size - zstream.total_out;
962.             zstream.next_out = pkt_data + zstream.total_out;

libavutil/mem.c:119:1: start of procedure av_realloc()
  117. }
  118. 
  119. void *av_realloc(void *ptr, FF_INTERNAL_MEM_TYPE 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:961:13: 
959.             pkt_size *= 3;
960.             pkt_data = av_realloc(pkt_data, pkt_size);
961.             zstream.avail_out = pkt_size - zstream.total_out;
                 ^
962.             zstream.next_out = pkt_data + zstream.total_out;
963.             result = inflate(&zstream, Z_NO_FLUSH);

libavformat/matroskadec.c:962:13: 
960.             pkt_data = av_realloc(pkt_data, pkt_size);
961.             zstream.avail_out = pkt_size - zstream.total_out;
962.             zstream.next_out = pkt_data + zstream.total_out;
                 ^
963.             result = inflate(&zstream, Z_NO_FLUSH);
964.         } while (result==Z_OK && pkt_size<10000000);

libavformat/matroskadec.c:963:13: Skipping inflate(): method has no implementation
961.             zstream.avail_out = pkt_size - zstream.total_out;
962.             zstream.next_out = pkt_data + zstream.total_out;
963.             result = inflate(&zstream, Z_NO_FLUSH);
                 ^
964.         } while (result==Z_OK && pkt_size<10000000);
965.         pkt_size = zstream.total_out;

libavformat/matroskadec.c:964:18: Loop condition is true. Entering loop body
962.             zstream.next_out = pkt_data + zstream.total_out;
963.             result = inflate(&zstream, Z_NO_FLUSH);
964.         } while (result==Z_OK && pkt_size<10000000);
                      ^
965.         pkt_size = zstream.total_out;
966.         inflateEnd(&zstream);

libavformat/matroskadec.c:964:34: Loop condition is true. Entering loop body
962.             zstream.next_out = pkt_data + zstream.total_out;
963.             result = inflate(&zstream, Z_NO_FLUSH);
964.         } while (result==Z_OK && pkt_size<10000000);
                                      ^
965.         pkt_size = zstream.total_out;
966.         inflateEnd(&zstream);

libavformat/matroskadec.c:959:13: 
957.         zstream.avail_in = isize;
958.         do {
959.             pkt_size *= 3;
                 ^
960.             pkt_data = av_realloc(pkt_data, pkt_size);
961.             zstream.avail_out = pkt_size - zstream.total_out;

libavformat/matroskadec.c:960:13: 
958.         do {
959.             pkt_size *= 3;
960.             pkt_data = av_realloc(pkt_data, pkt_size);
                 ^
961.             zstream.avail_out = pkt_size - zstream.total_out;
962.             zstream.next_out = pkt_data + zstream.total_out;

libavutil/mem.c:119:1: start of procedure av_realloc()
  117. }
  118. 
  119. void *av_realloc(void *ptr, FF_INTERNAL_MEM_TYPE 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)
