From 0612101c92f7043e47a1b4e80120582ff538c4f8 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Thu, 7 Jul 2022 05:37:30 +0800
Subject: vim-patch:8.2.5043: can open a cmdline window from a substitute
 expression

Problem:    Can open a cmdline window from a substitute expression.
Solution:   Disallow opening a command line window when text or buffer is
            locked.
https://github.com/vim/vim/commit/71223e2db87c2bf3b09aecb46266b56cda26191d
---
 src/nvim/testdir/test_substitute.vim | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'src/nvim/testdir')

diff --git a/src/nvim/testdir/test_substitute.vim b/src/nvim/testdir/test_substitute.vim
index e06da3b44f..bc1b3fae4b 100644
--- a/src/nvim/testdir/test_substitute.vim
+++ b/src/nvim/testdir/test_substitute.vim
@@ -1,5 +1,7 @@
 " Tests for the substitute (:s) command
 
+source shared.vim
+
 func Test_multiline_subst()
   enew!
   call append(0, ["1 aa",
@@ -873,6 +875,31 @@ func Test_sub_undo_change()
   delfunc Repl
 endfunc
 
+" This was opening a command line window from the expression
+func Test_sub_open_cmdline_win()
+  " the error only happens in a very specific setup, run a new Vim instance to
+  " get a clean starting point.
+  let lines =<< trim [SCRIPT]
+    norm o0000000000000000000000000000000000000000000000000000
+    func Replace()
+      norm q/
+    endfunc
+    s/\%')/\=Replace()
+    redir >Xresult
+    messages
+    redir END
+    qall!
+  [SCRIPT]
+  call writefile(lines, 'Xscript')
+  if RunVim([], [], '-u NONE -S Xscript')
+    let messages = readfile('Xresult')
+    call assert_match('E565: Not allowed to change text or change window', messages[3])
+  endif
+
+  call delete('Xscript')
+  call delete('Xresult')
+endfunc
+
 " Test for the 2-letter and 3-letter :substitute commands
 func Test_substitute_short_cmd()
   new
-- 
cgit