https://imagemagick.org/discourse-server/viewtopic.php?f=2&t=36611

diff --git a/MagickWand/magick-image.c b/MagickWand/magick-image.c
index 5937c2f72f1c6bae67d6137e50af9f5ace04b729..cdde764c333e15568d62f69063aa1b90640d83bd 100644 (file)
--- a/MagickWand/magick-image.c
+++ b/MagickWand/magick-image.c
@@ -10297,8 +10297,9 @@ WandExport MagickBooleanType MagickSetImageFilename(MagickWand *wand,
     (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",wand->name);
   if (wand->images == (Image *) NULL)
     ThrowWandException(WandError,"ContainsNoImages",wand->name);
-  if (filename != (const char *) NULL)
-    (void) CopyMagickString(wand->images->filename,filename,MagickPathExtent);
+  if (filename == (const char *) NULL)
+    return(MagickFalse);
+  (void) CopyMagickString(wand->images->filename,filename,MagickPathExtent);
   return(MagickTrue);
 }
 \f