From 7d603185e1c82453c990d15a6e09d29e6badb9b2 Mon Sep 17 00:00:00 2001
From: Henrik Lissner <henrik@lissner.net>
Date: Sun, 1 Nov 2020 23:38:42 -0500
Subject: [PATCH] Filter dead buffers from persp-mode workspaces

Fix #4196
Fix #1525
---
 modules/ui/workspaces/config.el | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/modules/ui/workspaces/config.el b/modules/ui/workspaces/config.el
index 546cc5ca9..cc8aee57b 100644
--- a/modules/ui/workspaces/config.el
+++ b/modules/ui/workspaces/config.el
@@ -142,6 +142,14 @@ stored in `persp-save-dir'.")
           (cadr prev-buffers)
         head)))
 
+  ;; HACK Fixes #4196, #1525: selecting deleted buffer error when quitting Emacs
+  ;;      or on some buffer listing ops.
+  (defadvice! +workspaces-remove-dead-buffers-a (persp)
+    :before #'persp-buffers-to-savelist
+    (when (persp-p persp)
+      (setf (persp-buffers persp)
+            (cl-delete-if-not #'persp-get-buffer-or-null (persp-buffers persp)))))
+
   ;; Delete the current workspace if closing the last open window
   (define-key! persp-mode-map
     [remap delete-window] #'+workspace/close-window-or-workspace