https://github.com/ImageMagick/ImageMagick/issues/599

diff --git a/coders/mat.c b/coders/mat.c
index 6b08f765ef5c5a34090cbea257ef7dee2043e513..14dde7d10d3f7dbb6bf8a289c9c81fed98a47219 100644 (file)
--- a/coders/mat.c
+++ b/coders/mat.c
@@ -933,7 +933,8 @@ static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
   if (strncmp(MATLAB_HDR.identific, "MATLAB", 6))
     {
 MATLAB_KO:
-      clone_info=DestroyImageInfo(clone_info);
+      if (clone_info != (ImageInfo *) NULL)
+        clone_info=DestroyImageInfo(clone_info);
       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
     }