vim-patch:8.2.2221: if <Down> is mapped on the command line 'wildchar' is inserted

Problem:    If <Down> is mapped on the command line 'wildchar' is inserted.
Solution:   Set KeyTyped when using 'wildchar'. (closes vim/vim#7552)
b0ac4ea5e1

src/nvim/ex_getln.c

@@ -1082,6 +1082,7 @@ static int command_line_execute(VimState *state, int key)
     if (s->c == K_DOWN && ccline.cmdpos > 0
         && ccline.cmdbuff[ccline.cmdpos - 1] == '.') {
       s->c = (int)p_wc;
+      KeyTyped = true;  // in case the key was mapped
     } else if (s->c == K_UP) {
       // Hitting <Up>: Remove one submenu name in front of the
       // cursor
@@ -1112,6 +1113,7 @@ static int command_line_execute(VimState *state, int key)
         cmdline_del(i);
       }
       s->c = (int)p_wc;
+      KeyTyped = true;  // in case the key was mapped
       s->xpc.xp_context = EXPAND_NOTHING;
     }
   }
@@ -1134,6 +1136,7 @@ static int command_line_execute(VimState *state, int key)
             || ccline.cmdbuff[ccline.cmdpos - 3] != '.')) {
       // go down a directory
       s->c = (int)p_wc;
+      KeyTyped = true;  // in case the key was mapped
     } else if (STRNCMP(s->xpc.xp_pattern, upseg + 1, 3) == 0
         && s->c == K_DOWN) {
       // If in a direct ancestor, strip off one ../ to go down
@@ -1154,6 +1157,7 @@ static int command_line_execute(VimState *state, int key)
           && (vim_ispathsep(ccline.cmdbuff[j - 3]) || j == i + 2)) {
         cmdline_del(j - 2);
         s->c = (int)p_wc;
+        KeyTyped = true;  // in case the key was mapped
       }
     } else if (s->c == K_UP) {
       // go up a directory

src/nvim/testdir/test_cmdline.vim

@@ -51,6 +51,19 @@ func Test_complete_wildmenu()
   call feedkeys(":e Xdir1/\<Tab>\<Down>\<Up>\<Right>\<CR>", 'tx')
   call assert_equal('testfile1', getline(1))
 
+  +  " <C-J>/<C-K> mappings to go up/down directories when 'wildcharm' is
+  " different than 'wildchar'.
+  set wildcharm=<C-Z>
+  cnoremap <C-J> <Down><C-Z>
+  cnoremap <C-K> <Up><C-Z>
+  call feedkeys(":e Xdir1/\<Tab>\<C-J>\<CR>", 'tx')
+  call assert_equal('testfile3', getline(1))
+  call feedkeys(":e Xdir1/\<Tab>\<C-J>\<C-K>\<CR>", 'tx')
+  call assert_equal('testfile1', getline(1))
+  set wildcharm=0
+  cunmap <C-J>
+  cunmap <C-K>
+
   " cleanup
   %bwipe
   call delete('Xdir1/Xdir2/Xtestfile4')