tools/tiff2pdf.c:2050: error: Null Dereference
  pointer `tbc` last assigned on line 2026 could be null and is dereferenced at line 2050, column 6.

tools/tiff2pdf.c:2024:1: start of procedure t2p_read_tiff_size_tile()
2022. */
2023. 
2024. void t2p_read_tiff_size_tile(T2P* t2p, TIFF* input, ttile_t tile){
      ^
2025. 
2026. 	uint64* tbc = NULL;

tools/tiff2pdf.c:2026:2: 
2024. void t2p_read_tiff_size_tile(T2P* t2p, TIFF* input, ttile_t tile){
2025. 
2026. 	uint64* tbc = NULL;
       ^
2027. 	uint16 edge=0;
2028. #ifdef JPEG_SUPPORT

tools/tiff2pdf.c:2027:2: 
2025. 
2026. 	uint64* tbc = NULL;
2027. 	uint16 edge=0;
       ^
2028. #ifdef JPEG_SUPPORT
2029. 	unsigned char* jpt;

tools/tiff2pdf.c:2033:2: 
2031.         uint64 k;
2032. 
2033. 	edge |= t2p_tile_is_right_edge(t2p->tiff_tiles[t2p->pdf_page], tile);
       ^
2034. 	edge |= t2p_tile_is_bottom_edge(t2p->tiff_tiles[t2p->pdf_page], tile);
2035. 	

tools/tiff2pdf.c:2098:1: start of procedure t2p_tile_is_right_edge()
  2096.  */
  2097. 
  2098. int t2p_tile_is_right_edge(T2P_TILES tiles, ttile_t tile){
        ^
  2099. 
  2100. 	if( ((tile+1) % tiles.tiles_tilecountx == 0) 

tools/tiff2pdf.c:2100:7: Taking false branch
  2098. int t2p_tile_is_right_edge(T2P_TILES tiles, ttile_t tile){
  2099. 
  2100. 	if( ((tile+1) % tiles.tiles_tilecountx == 0) 
              ^
  2101. 		&& (tiles.tiles_edgetilewidth != 0) ){
  2102. 		return(1);

tools/tiff2pdf.c:2104:3: 
  2102. 		return(1);
  2103. 	} else {
  2104. 		return(0);
          ^
  2105. 	}
  2106. }

tools/tiff2pdf.c:2106:1: return from a call to t2p_tile_is_right_edge
  2104. 		return(0);
  2105. 	}
  2106. }
        ^
  2107. 
  2108. /*

tools/tiff2pdf.c:2034:2: 
2032. 
2033. 	edge |= t2p_tile_is_right_edge(t2p->tiff_tiles[t2p->pdf_page], tile);
2034. 	edge |= t2p_tile_is_bottom_edge(t2p->tiff_tiles[t2p->pdf_page], tile);
       ^
2035. 	
2036. 	if(t2p->pdf_transcode==T2P_TRANSCODE_RAW){

tools/tiff2pdf.c:2113:1: start of procedure t2p_tile_is_bottom_edge()
  2111.  */
  2112. 
  2113. int t2p_tile_is_bottom_edge(T2P_TILES tiles, ttile_t tile){
        ^
  2114. 
  2115. 	if( ((tile+1) > (tiles.tiles_tilecount-tiles.tiles_tilecountx) )

tools/tiff2pdf.c:2115:7: Taking false branch
  2113. int t2p_tile_is_bottom_edge(T2P_TILES tiles, ttile_t tile){
  2114. 
  2115. 	if( ((tile+1) > (tiles.tiles_tilecount-tiles.tiles_tilecountx) )
              ^
  2116. 		&& (tiles.tiles_edgetilelength != 0) ){
  2117. 		return(1);

tools/tiff2pdf.c:2119:3: 
  2117. 		return(1);
  2118. 	} else {
  2119. 		return(0);
          ^
  2120. 	}
  2121. }

tools/tiff2pdf.c:2121:1: return from a call to t2p_tile_is_bottom_edge
  2119. 		return(0);
  2120. 	}
  2121. }
        ^
  2122. 
  2123. /*

tools/tiff2pdf.c:2036:5: Taking true branch
2034. 	edge |= t2p_tile_is_bottom_edge(t2p->tiff_tiles[t2p->pdf_page], tile);
2035. 	
2036. 	if(t2p->pdf_transcode==T2P_TRANSCODE_RAW){
          ^
2037. 		if(edge
2038. #if defined(JPEG_SUPPORT) || defined(OJPEG_SUPPORT)

tools/tiff2pdf.c:2037:6: Taking false branch
2035. 	
2036. 	if(t2p->pdf_transcode==T2P_TRANSCODE_RAW){
2037. 		if(edge
           ^
2038. #if defined(JPEG_SUPPORT) || defined(OJPEG_SUPPORT)
2039. 		&& !(t2p->pdf_compression==T2P_COMPRESS_JPEG)

tools/tiff2pdf.c:2049:4: 
2047. 			return;
2048. 		} else {
2049. 			TIFFGetField(input, TIFFTAG_TILEBYTECOUNTS, &tbc);
         ^
2050. 			k=tbc[tile];
2051. #ifdef OJPEG_SUPPORT

libtiff/tif_dir.c:1151:1: start of procedure TIFFGetField()
  1149.  * internal directory structure.
  1150.  */
  1151. int
        ^
  1152. TIFFGetField(TIFF* tif, uint32 tag, ...)
  1153. {

libtiff/tif_dir.c:1157:2: 
  1155. 	va_list ap;
  1156. 
  1157. 	va_start(ap, tag);
         ^
  1158. 	status = TIFFVGetField(tif, tag, ap);
  1159. 	va_end(ap);

libtiff/tif_dir.c:1158:2: Skipping TIFFVGetField(): empty list of specs
  1156. 
  1157. 	va_start(ap, tag);
  1158. 	status = TIFFVGetField(tif, tag, ap);
         ^
  1159. 	va_end(ap);
  1160. 	return (status);

libtiff/tif_dir.c:1159:2: 
  1157. 	va_start(ap, tag);
  1158. 	status = TIFFVGetField(tif, tag, ap);
  1159. 	va_end(ap);
         ^
  1160. 	return (status);
  1161. }

libtiff/tif_dir.c:1160:2: 
  1158. 	status = TIFFVGetField(tif, tag, ap);
  1159. 	va_end(ap);
  1160. 	return (status);
         ^
  1161. }
  1162. 

libtiff/tif_dir.c:1161:1: return from a call to TIFFGetField
  1159. 	va_end(ap);
  1160. 	return (status);
  1161. }
        ^
  1162. 
  1163. /*

tools/tiff2pdf.c:2050:4: 
2048. 		} else {
2049. 			TIFFGetField(input, TIFFTAG_TILEBYTECOUNTS, &tbc);
2050. 			k=tbc[tile];
         ^
2051. #ifdef OJPEG_SUPPORT
2052. 			if(t2p->tiff_compression==COMPRESSION_OJPEG){
