Fix cl-concatenate inlining

* lisp/emacs-lisp/seq.el (seq-concatenate): Auto-load it.  Do not
merge to master.  (Bug#45610)

1 files changed, 3 insertions, 0 deletions

diff --git a/lisp/emacs-lisp/seq.el b/lisp/emacs-lisp/seq.el
index e84f618297a..ef2b1092c83 100644
--- a/lisp/emacs-lisp/seq.el
+++ b/lisp/emacs-lisp/seq.el
@@ -284,6 +284,9 @@ sorted.  FUNCTION must be a function of one argument."
 (cl-defmethod seq-reverse ((sequence sequence))
   (reverse sequence))
 
+;; We are autoloading seq-concatenate because cl-concatenate needs
+;; that when it's inlined, per the cl-proclaim in cl-macs.el.
+;;;###autoload
 (cl-defgeneric seq-concatenate (type &rest sequences)
   "Concatenate SEQUENCES into a single sequence of type TYPE.
 TYPE must be one of following symbols: vector, string or list.