https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=29839

diff --git a/coders/caption.c b/coders/caption.c
index f8f26fc0c86dd1f13556a6811e537b373d78de85..6bdb6986653fbff67a674c2229d58ed076b1b2db 100644 (file)
--- a/coders/caption.c
+++ b/coders/caption.c
@@ -202,7 +202,7 @@ static Image *ReadCAPTIONImage(const ImageInfo *image_info,
       image=DestroyImageList(image);
       return((Image *) NULL);
     }
-  if (fabs(image_info->pointsize) < MagickEpsilon)
+  if ((fabs(image_info->pointsize) < MagickEpsilon) && (strlen(caption) > 0))
     {
       double
         high,