From: Sam Steingold <sds@gnu.org>
Date: Wed, 29 Jan 2020 16:17:50 +0000 (-0500)
Subject: fix bug#39344
X-Git-Tag: emacs-28.0.90~7908^2~32
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=bb3b0990d8505342ae14841144778df9e650ebdc;p=emacs.git

fix bug#39344

* gnus.el (gnus-add-buffer): Use `cl-pushnew' instead of `push' to
  avoid duplicate entries.
---

diff --git a/lisp/gnus/gnus.el b/lisp/gnus/gnus.el
index 6df26b4af8c..caeab7f55af 100644
--- a/lisp/gnus/gnus.el
+++ b/lisp/gnus/gnus.el
@@ -660,7 +660,7 @@ be used directly.")
 (defun gnus-add-buffer ()
   "Add the current buffer to the list of Gnus buffers."
   (gnus-prune-buffers)
-  (push (current-buffer) gnus-buffers))
+  (cl-pushnew (current-buffer) gnus-buffers))
 
 (defmacro gnus-kill-buffer (buffer)
   "Kill BUFFER and remove from the list of Gnus buffers."