From 965fff2db0d15ddd074ede8efa030f9032d4f4eb Mon Sep 17 00:00:00 2001
From: Daniel Mendler <mail@daniel-mendler.de>
Date: Sun, 22 Jan 2023 05:09:27 +0100
Subject: Add :extended version check

---
 compat-macs.el | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compat-macs.el b/compat-macs.el
index b46a410..4ba7cc1 100644
--- a/compat-macs.el
+++ b/compat-macs.el
@@ -97,6 +97,9 @@ REST are attributes and the function BODY."
                         :body t)
     (lambda (extended obsolete body)
       (when (stringp extended)
+        (compat-macs--assert
+         (and (version< extended compat-macs--version) (version< "24.4" extended))
+         "Invalid :extended version %s for %s %s" extended type name)
         (setq extended (version<= extended emacs-version)))
       (compat-macs--strict (eq extended (fboundp name))
                       "Wrong :extended flag for %s %s" type name)
-- 
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