helpful

commit a94cf0edbda736c030a764b911d3e441dac930d6
parent ccdb8f0a98e541631fafb2425f7d175132eb6f6d
Author: Wilfred Hughes <me@wilfred.me.uk>
Date:   Fri,  7 Apr 2017 21:29:26 +0100

Add a useful assert

Diffstat:
M
helpful.el
 | 
1
+

1 file changed, 1 insertion(+), 0 deletions(-)
diff --git a/helpful.el b/helpful.el
@@ -236,6 +236,7 @@ Ensures global keybindings are shown first."
   "Update the current *Helpful* buffer to the latest
 state of the current symbol."
   (interactive)
+  (cl-assert (not (null helpful--sym)))
   (let ((inhibit-read-only t)
         (start-pos (point))
         (source (helpful--source helpful--sym))