From: Michael Albinus <michael.albinus@gmx.de>
Date: Sun, 25 Jun 2023 12:31:23 +0000 (+0200)
Subject: Fix type check in tramp-get-buffer-string
X-Git-Tag: emacs-29.1-rc1~109
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=fc7e7c3fde3;p=emacs.git

Fix type check in tramp-get-buffer-string

* lisp/net/tramp.el (tramp-get-buffer-string): Check, that BUFFER
is really a bufferp.
---

diff --git a/lisp/net/tramp.el b/lisp/net/tramp.el
index b46eeb8e374..20678ec8d1a 100644
--- a/lisp/net/tramp.el
+++ b/lisp/net/tramp.el
@@ -1960,8 +1960,11 @@ version, the function does nothing."
   "Return contents of BUFFER.
 If BUFFER is not a buffer or a buffer name, return the contents
 of `current-buffer'."
-  (with-current-buffer (or buffer (current-buffer))
-    (substring-no-properties (buffer-string))))
+  (or (let ((buf (or buffer (current-buffer))))
+        (when (bufferp buf)
+          (with-current-buffer (or buffer (current-buffer))
+	    (substring-no-properties (buffer-string)))))
+      ""))
 
 (defun tramp-debug-buffer-name (vec)
   "A name for the debug buffer for VEC."