From 653bd99b77191a32e3331b8bbfcadf3580f35eae Mon Sep 17 00:00:00 2001
From: Henrik Lissner <henrik@lissner.net>
Date: Sat, 1 Jun 2019 00:13:47 -0400
Subject: [PATCH] Polyfill kill-current-buffer in Emacs<=25.3 #1446

kill-current-buffer wasn't introduced until Emacs 26.
---
 core/core.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/core.el b/core/core.el
index 5f76032eb..932f312aa 100644
--- a/core/core.el
+++ b/core/core.el
@@ -536,6 +536,8 @@ to least)."
   (require 'cl-lib)
   (unless EMACS26+
     (with-no-warnings
+      ;; `kill-current-buffer' was introduced in Emacs 26
+      (defalias 'kill-current-buffer #'kill-this-buffer)
       ;; if-let and when-let were moved to (if|when)-let* in Emacs 26+ so we
       ;; alias them for 25 users.
       (defalias 'if-let* #'if-let)