From 27149e0071c3fa38c81526f63a997bedfd6e2be8 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Tue, 3 May 2022 06:11:22 +0800
Subject: vim-patch:8.2.4858: K_SPECIAL may be escaped twice

Problem:    K_SPECIAL may be escaped twice.
Solution:   Avoid double escaping. (closes vim/vim#10340)
https://github.com/vim/vim/commit/db08887f24d20be11d184ce321bc0890613e42bd
---
 src/nvim/testdir/test_eval_stuff.vim | 22 ++++++++++++++++++++++
 1 file changed, 22 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 95eccde35c..811c6c946d 100644
--- a/src/nvim/testdir/test_eval_stuff.vim
+++ b/src/nvim/testdir/test_eval_stuff.vim
@@ -320,4 +320,26 @@ func Test_curly_assignment()
   unlet g:gvar
 endfunc
 
+" K_SPECIAL in the modified character used be escaped, which causes
+" double-escaping with feedkeys() or as the return value of an <expr> mapping,
+" and doesn't match what getchar() returns,
+func Test_modified_char_no_escape_special()
+  nnoremap <M-…> <Cmd>let g:got_m_ellipsis += 1<CR>
+  call feedkeys("\<M-…>", 't')
+  call assert_equal("\<M-…>", getchar())
+  let g:got_m_ellipsis = 0
+  call feedkeys("\<M-…>", 'xt')
+  call assert_equal(1, g:got_m_ellipsis)
+  func Func()
+    return "\<M-…>"
+  endfunc
+  nmap <expr> <F2> Func()
+  call feedkeys("\<F2>", 'xt')
+  call assert_equal(2, g:got_m_ellipsis)
+  delfunc Func
+  nunmap <F2>
+  unlet g:got_m_ellipsis
+  nunmap <M-…>
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
-- 
cgit