From fbc6d3ec8656776cdc96e49f9585ba53acdbf6b1 Mon Sep 17 00:00:00 2001
From: stardiviner <numbchild@gmail.com>
Date: Tue, 9 Jul 2024 00:43:55 +0800
Subject: [PATCH] display tip when explanation function return nil

---
 org-tag-eldoc.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/org-tag-eldoc.el b/org-tag-eldoc.el
index 34be749..3745630 100644
--- a/org-tag-eldoc.el
+++ b/org-tag-eldoc.el
@@ -151,7 +151,8 @@ Backend for sideline.
 Argument COMMAND is required in sideline backend."
   (cl-case command
     (`candidates (when (derived-mode-p 'org-mode)
-                   (list (org-tag-eldoc-tag-explanation-at-point))))
+                   (list (or (org-tag-eldoc-tag-explanation-at-point)
+                             "[error] explanation function return nil"))))
     (`action 'org-tag-eldoc-database-update-row)
     (`face 'org-tag)
     (`name "org-tag-eldoc")))
-- 
2.11.4.GIT