From: Glenn Morris <rgm@gnu.org>
Date: Fri, 20 Oct 2017 23:18:23 +0000 (-0400)
Subject: Tweak Fdocumentation's error for an undefined function
X-Git-Tag: emacs-26.0.91~509
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=6a00914d6d4e4eaac4d4beea19570838a72a1e39;p=emacs.git

Tweak Fdocumentation's error for an undefined function

* src/doc.c (Fdocumentation): Restore the pre-25 behavior
of signalling a void-function error for an undefined function.
This seems cleaner than Emacs 25's "invalid-function: nil" error,
which was (probably) an unintended consequence of changes to
Findirect_function.
---

diff --git a/src/doc.c b/src/doc.c
index 3286c12675a..e81740bfc1c 100644
--- a/src/doc.c
+++ b/src/doc.c
@@ -336,6 +336,8 @@ string is passed through `substitute-command-keys'.  */)
     }
 
   fun = Findirect_function (function, Qnil);
+  if (NILP (fun))
+    xsignal1 (Qvoid_function, function);
   if (CONSP (fun) && EQ (XCAR (fun), Qmacro))
     fun = XCDR (fun);
   if (SUBRP (fun))