From 0382c9d8c1f45aaacc8800b6d88f0041b6812469 Mon Sep 17 00:00:00 2001
From: w0rp <devw0rp@gmail.com>
Date: Fri, 6 Jan 2023 19:02:35 +0000
Subject: [PATCH] Fix #4413 - Avoid errors for invalid buffers in
 ale#virtualtext#Clear

---
 autoload/ale/virtualtext.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autoload/ale/virtualtext.vim b/autoload/ale/virtualtext.vim
index 3d5d595e..63346d79 100644
--- a/autoload/ale/virtualtext.vim
+++ b/autoload/ale/virtualtext.vim
@@ -48,7 +48,7 @@ if !has_key(s:, 'has_virt_text')
 endif
 
 function! ale#virtualtext#Clear(buf) abort
-    if !s:has_virt_text
+    if !s:has_virt_text || !bufexists(str2nr(a:buf))
         return
     endif