Merge pull request #17986 from zeertzjq/fix-ex-mode-regression

Fix regression with :normal and Ex mode from #14311

src/nvim/ex_cmds.c

@@ -3860,19 +3860,22 @@ static buf_T *do_sub(exarg_T *eap, proftime_T timeout, bool do_buf_event, handle
               prompt = xmallocz(ec + 1);
               memset(prompt, ' ', sc);
               memset(prompt + sc, '^', ec - sc + 1);
-              resp = (char_u *)getcmdline_prompt(NUL, prompt, 0, EXPAND_NOTHING,
+              resp = (char_u *)getcmdline_prompt(-1, prompt, 0, EXPAND_NOTHING,
                                                  NULL, CALLBACK_NONE);
               msg_putchar('\n');
               xfree(prompt);
               if (resp != NULL) {
                 typed = *resp;
                 xfree(resp);
-                // When ":normal" runs out of characters we get
+              } else {
-                // an empty line.  Use "q" to get out of the
+                // getcmdline_prompt() returns NULL if there is no command line to return.
-                // loop.
+                typed = NUL;
-                if (ex_normal_busy && typed == NUL) {
+              }
-                  typed = 'q';
+              // When ":normal" runs out of characters we get
-                }
+              // an empty line.  Use "q" to get out of the
+              // loop.
+              if (ex_normal_busy && typed == NUL) {
+                typed = 'q';
               }
             } else {
               char_u *orig_line = NULL;

src/nvim/getchar.c

@@ -2330,8 +2330,6 @@ static int vgetorpeek(bool advance)
           // cmdline window.
           if (p_im && (State & INSERT)) {
             c = Ctrl_L;
-          } else if ((State & CMDLINE) && exmode_active) {
-            c = '\n';
           } else if ((State & CMDLINE) || (cmdwin_type > 0 && tc == ESC)) {
             c = Ctrl_C;
           } else {

test/functional/ex_cmds/normal_spec.lua

@@ -1,7 +1,10 @@
 local helpers = require('test.functional.helpers')(after_each)
 local clear = helpers.clear
+local command = helpers.command
 local feed = helpers.feed
 local expect = helpers.expect
+local eq = helpers.eq
+local eval = helpers.eval
 
 before_each(clear)
 
@@ -10,4 +13,15 @@ describe(':normal', function()
     feed('gQnormal! Ifoo<CR>')
     expect('foo')
   end)
+
+  it('normal! does not execute command in Ex mode when running out of characters', function()
+    command('let g:var = 0')
+    command('normal! gQlet g:var = 1')
+    eq(0, eval('g:var'))
+  end)
+
+  it('normal! gQinsert does not hang #17980', function()
+    command('normal! gQinsert')
+    expect('')
+  end)
 end)