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-rw-r--r--gnosis-algorithm.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/gnosis-algorithm.el b/gnosis-algorithm.el
index a032760..f3ea4aa 100644
--- a/gnosis-algorithm.el
+++ b/gnosis-algorithm.el
@@ -123,6 +123,7 @@ On lethe events the next interval is set to 0."
(defun gnosis-algorithm-date (&optional offset)
"Return the current date in a list (year month day).
Optional integer OFFSET is a number of days from the current date."
+ (cl-assert (or (numberp offset) (null offset)) nil "Date offset must be an integer or nil")
(let* ((now (decode-time))
(now (list (decoded-time-month now)
(decoded-time-day now)