From 7ded303d684605ea44846c5f8a4031326529fb6d Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Wed, 18 May 2022 08:21:24 +0800
Subject: vim-patch:8.2.4975: recursive command line loop may cause a crash
 (#18614)

Problem:    Recursive command line loop may cause a crash.
Solution:   Limit recursion of getcmdline().
https://github.com/vim/vim/commit/51f0bfb88a3554ca2dde777d78a59880d1ee37a8

Cherry-pick e_command_too_recursive from patch 8.2.3957.
---
 src/nvim/testdir/test_cmdline.vim | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/nvim/testdir')

diff --git a/src/nvim/testdir/test_cmdline.vim b/src/nvim/testdir/test_cmdline.vim
index 759caac878..b2c752376f 100644
--- a/src/nvim/testdir/test_cmdline.vim
+++ b/src/nvim/testdir/test_cmdline.vim
@@ -1224,4 +1224,16 @@ func Test_screenpos_and_completion()
   call feedkeys(":let a\<C-R>=Check_completion()\<CR>\<Esc>", "xt")
 endfunc
 
+func Test_recursive_register()
+  let @= = ''
+  silent! ?e/
+  let caught = 'no'
+  try
+    normal // 
+  catch /E169:/
+    let caught = 'yes'
+  endtry
+  call assert_equal('yes', caught)
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
-- 
cgit