From 65bcec9e9ba8f134536b9d3db1d5beac26991e17 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Wed, 17 Aug 2022 08:58:51 +0800
Subject: vim-patch:9.0.0220: invalid memory access with for loop over NULL
 string

Problem:    Invalid memory access with for loop over NULL string.
Solution:   Make sure mb_ptr2len() consistently returns zero for NUL.
https://github.com/vim/vim/commit/f6d39c31d2177549a986d170e192d8351bd571e2
---
 src/nvim/testdir/test_eval_stuff.vim | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/nvim/testdir/test_eval_stuff.vim')

diff --git a/src/nvim/testdir/test_eval_stuff.vim b/src/nvim/testdir/test_eval_stuff.vim
index 811c6c946d..eff1376d3c 100644
--- a/src/nvim/testdir/test_eval_stuff.vim
+++ b/src/nvim/testdir/test_eval_stuff.vim
@@ -75,6 +75,18 @@ func Test_for_invalid()
   redraw
 endfunc
 
+func Test_for_over_null_string()
+  let save_enc = &enc
+  " set enc=iso8859
+  let cnt = 0
+  for c in v:_null_string
+    let cnt += 1
+  endfor
+  call assert_equal(0, cnt)
+
+  let &enc = save_enc
+endfunc
+
 func Test_readfile_binary()
   new
   call setline(1, ['one', 'two', 'three'])
-- 
cgit