From 3c24374d1455125915edae88c6408ecdb4bbbf48 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Fri, 1 Jul 1994 20:45:59 +0000
Subject: [PATCH] (shell-mode): Don't read history from /dev/null.

---
 lisp/shell.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lisp/shell.el b/lisp/shell.el
index 8c38328b82f..010af64ba1f 100644
--- a/lisp/shell.el
+++ b/lisp/shell.el
@@ -346,6 +346,8 @@ buffer."
 	      (cond ((string-equal shell "bash") "~/.bash_history")
 		    ((string-equal shell "ksh") "~/.sh_history")
 		    (t "~/.history"))))
+    (if (equal comint-input-ring-file-name "/dev/null")
+	(setq comint-input-ring-file-name nil))
     (setq shell-dirstack-query
 	  (if (string-match "^k?sh$" shell) "pwd" "dirs")))
   (run-hooks 'shell-mode-hook)
-- 
2.39.5