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From 3794389ef685b6a59b3a487d0492c3add3c42c2f Mon Sep 17 00:00:00 2001
From: Xiyue Deng <manphiz@gmail.com>
Date: Wed, 26 Feb 2025 15:39:42 -0800
Subject: [PATCH] Check for interpreted-function-p
Emacs 30.x added interpreted-function which is different from
byte-code-function, and hence helpful--signature will try to treat it
like a lambda which will fail with
,----
| (wrong-type-argument listp #[(x) (x) (t) nil "Foo"])
`----
This patch adds tests for such case using interpreted-function-p when
it's available.
---
helpful.el | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/helpful.el b/helpful.el
index b100816..331ece8 100644
--- a/helpful.el
+++ b/helpful.el
@@ -2570,7 +2570,9 @@ For example, \"(some-func FOO &optional BAR)\"."
(cond
((symbolp sym)
(help-function-arglist sym))
- ((byte-code-function-p sym)
+ ((or (byte-code-function-p sym)
+ (if (fboundp 'interpreted-function-p)
+ (interpreted-function-p sym)))
;; argdesc can be a list of arguments or an integer
;; encoding the min/max number of arguments. See
;; Byte-Code Function Objects in the elisp manual.
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