https://github.com/ImageMagick/ImageMagick/issues/1452

diff --git a/coders/sixel.c b/coders/sixel.c
index a8a658f352ceaa65f65fdf01b2591769a2e5339c..ae32db87490be730748dbdd31d96eb5733d13da6 100644 (file)
--- a/coders/sixel.c
+++ b/coders/sixel.c
@@ -1057,6 +1057,7 @@ static Image *ReadSIXELImage(const ImageInfo *image_info,ExceptionInfo *exceptio
   if (sixel_decode(image,(unsigned char *) sixel_buffer,&sixel_pixels,&image->columns,&image->rows,&sixel_palette,&image->colors,exception) == MagickFalse)
     {
       sixel_buffer=(char *) RelinquishMagickMemory(sixel_buffer);
+      sixel_pixels=(unsigned char *) RelinquishMagickMemory(sixel_pixels);
       ThrowReaderException(CorruptImageError,"CorruptImage");
     }
   sixel_buffer=(char *) RelinquishMagickMemory(sixel_buffer);