From: Andrii Kolomoiets <andreyk.mad@gmail.com>
Date: Thu, 28 Nov 2019 13:54:41 +0000 (+0200)
Subject: Ensure buffer is alive in python-pdbtrack-unset-tracked-buffer
X-Git-Tag: emacs-27.0.90~417
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=89a4488f8950c52b6e3fd8b780761ede87b518fd;p=emacs.git

Ensure buffer is alive in python-pdbtrack-unset-tracked-buffer

* lisp/progmodes/python.el (python-pdbtrack-unset-tracked-buffer):
Check if buffer `python-pdbtrack-tracked-buffer' is alive.
(Bug#38413)
---

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index e720c6eb6a8..1b3b92deaf5 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -3832,10 +3832,10 @@ Returns the tracked buffer."
 
 (defun python-pdbtrack-unset-tracked-buffer ()
   "Untrack currently tracked buffer."
-  (when python-pdbtrack-tracked-buffer
+  (when (buffer-live-p python-pdbtrack-tracked-buffer)
     (with-current-buffer python-pdbtrack-tracked-buffer
-      (set-marker overlay-arrow-position nil))
-    (setq python-pdbtrack-tracked-buffer nil)))
+      (set-marker overlay-arrow-position nil)))
+  (setq python-pdbtrack-tracked-buffer nil))
 
 (defun python-pdbtrack-tracking-finish ()
   "Finish tracking."