1 files changed, 6 insertions, 2 deletions
diff --git a/gnosis.el b/gnosis.el
index 3487001..a819c9d 100644
--- a/gnosis.el
+++ b/gnosis.el
@@ -730,8 +730,12 @@ Works both with {} and {{}} to make easier to import anki notes."
   "In STRING replace only the first occurrence of each word in WORDS with NEW."
   (cl-assert (listp words))
   (cl-loop for word in words
-           do (when (string-match (concat "\\<" word "\\>") string)
-                (setq string (replace-match new t t string))))
+           do (if (string-match (concat "\\<" word "\\>") string)
+		  (setq string (replace-match new t t string))
+		;; This error will be produced when user has edited a
+		;; note to an invalid cloze.
+		(error "`%s' is an invalid cloze for question: `%s'."
+		       word string )))
   string)
 
 (defun gnosis-cloze-extract-answers (str)