From dcf7bc414037c888dbc4003caf9e28ffb0f7d4e2 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Sun, 17 Apr 2022 03:54:28 +0800
Subject: vim-patch:8.2.4762: using freed memory using synstack() and synID()
 in WinEnter (#18136)

Problem:    Using freed memory when using synstack() and synID() in WinEnter.
Solution:   Check using the syntax window. (closes vim/vim#10204)
https://github.com/vim/vim/commit/ca7e86c23789eb0ed8f6400f25ea9e0e1036f9fc
---
 src/nvim/testdir/test_syntax.vim | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src/nvim/testdir')

diff --git a/src/nvim/testdir/test_syntax.vim b/src/nvim/testdir/test_syntax.vim
index b047b53b6f..6bef61ae8f 100644
--- a/src/nvim/testdir/test_syntax.vim
+++ b/src/nvim/testdir/test_syntax.vim
@@ -794,5 +794,18 @@ func Test_syn_include_contains_TOP()
   bw!
 endfunc
 
+" This was using freed memory
+func Test_WinEnter_synstack_synID()
+  autocmd WinEnter * call synstack(line("."), col("."))
+  autocmd WinEnter * call synID(line('.'), col('.') - 1, 1)
+  call setline(1, 'aaaaa')
+  normal! $
+  new
+  close
+
+  au! WinEnter
+  bw!
+endfunc
+
 
 " vim: shiftwidth=2 sts=2 expandtab
-- 
cgit