From: Noam Postavsky <npostavs@gmail.com>
Date: Fri, 31 May 2019 12:24:56 +0000 (-0400)
Subject: Allow macros autoloaded as functions during bytecomp (Bug#36022)
X-Git-Tag: emacs-26.2.90~27
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=2860285621eb890697ca122cd6ede8c3f03566d6;p=emacs.git

Allow macros autoloaded as functions during bytecomp (Bug#36022)

* lisp/emacs-lisp/bytecomp.el (byte-compile-callargs-warn): Don't pass
symbols which don't have a known definition to
byte-compile--function-signature, it fails to compile code which
previously compiled successfully (for example, gnus.el until
2019-06-01 "* lisp/gnus/gnus.el: Mark autoloaded macros as such" which
autoloads some macros as if they were functions).
---

diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index 72e81a653c7..e3b34c189f6 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -1379,7 +1379,9 @@ when printing the error message."
 (defun byte-compile-callargs-warn (form)
   (let* ((def (or (byte-compile-fdefinition (car form) nil)
 		  (byte-compile-fdefinition (car form) t)))
-         (sig (byte-compile--function-signature (or def (car form))))
+         (sig (cond (def (byte-compile--function-signature def))
+                    ((subrp (symbol-function (car form)))
+                     (subr-arity (symbol-function (car form))))))
 	 (ncall (length (cdr form))))
     ;; Check many or unevalled from subr-arity.
     (if (and (cdr-safe sig)