https://github.com/ImageMagick/ImageMagick/issues/644

diff --git a/coders/mat.c b/coders/mat.c
index 76a746fd51e022a1c57eb784b7fe9d96d12076cf..b5c91b2aa6af914caa21201df69480e272b4f444 100644 (file)
--- a/coders/mat.c
+++ b/coders/mat.c
@@ -1138,7 +1138,11 @@ RestoreMSCWarning
     }
     status=SetImageExtent(image,image->columns,image->rows,exception);
     if (status == MagickFalse)
-      return(DestroyImageList(image));
+      {
+        if ((image != image2) && (image2 != (Image *) NULL))
+          image2=DestroyImage(image2);
+        return(DestroyImageList(image));
+      }
     quantum_info=AcquireQuantumInfo(clone_info,image);
     if (quantum_info == (QuantumInfo *) NULL)
       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");