From 73bdfdd382bf2addd7816571608db6911448b48a Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Thu, 13 Oct 2022 09:43:06 +0800
Subject: vim-patch:8.2.4453: :helpgrep may free an option that was not
 allocated

Problem:    :helpgrep may free an option that was not allocated. (Yegappan
            Lakshmanan)
Solution:   Check if the value was allocated.
https://github.com/vim/vim/commit/4791fcd82565adcc60b86830e0bb6cd5b6eea0a6
---
 src/nvim/testdir/test_quickfix.vim | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'src/nvim/testdir')

diff --git a/src/nvim/testdir/test_quickfix.vim b/src/nvim/testdir/test_quickfix.vim
index 8c9e39570f..51b11b5511 100644
--- a/src/nvim/testdir/test_quickfix.vim
+++ b/src/nvim/testdir/test_quickfix.vim
@@ -714,6 +714,33 @@ func Test_helpgrep()
   call s:test_xhelpgrep('l')
 endfunc
 
+func Test_helpgrep_restore_cpo_aucmd()
+  let save_cpo = &cpo
+  augroup QF_Test
+    au!
+    autocmd BufNew * set cpo=acd
+  augroup END
+
+  helpgrep quickfix
+  call assert_equal('acd', &cpo)
+  %bw!
+
+  set cpo&vim
+  augroup QF_Test
+    au!
+    autocmd BufReadPost * set cpo=
+  augroup END
+
+  helpgrep buffer
+  call assert_equal('', &cpo)
+
+  augroup QF_Test
+    au!
+  augroup END
+  %bw!
+  let &cpo = save_cpo
+endfunc
+
 func Test_errortitle()
   augroup QfBufWinEnter
     au!
-- 
cgit