patch 8.1.1189: mode is not cleared when leaving Insert mode

Problem:    Mode is not cleared when leaving Insert mode.
Solution:   Clear the mode when got_int is set. (Ozaki Kiichi, closes #4270)

Author: brammool

src/edit.c

@@ -4564,7 +4564,7 @@ ins_esc(
      */
     if (reg_recording != 0 || restart_edit != NUL)
 	showmode();
-    else if (p_smd && !skip_showmode())
+    else if (p_smd && (got_int || !skip_showmode()))
 	msg("");
 
     return TRUE;	    /* exit Insert mode */

src/testdir/test_bufline.vim

@@ -18,7 +18,7 @@ func Test_setbufline_getbufline()
   let b = bufnr('%')
   wincmd w
   call assert_equal(1, setbufline(b, 5, ['x']))
-  call assert_equal(1, setbufline(1234, 1, ['x']))
+  call assert_equal(1, setbufline(bufnr('$') + 1, 1, ['x']))
   call assert_equal(0, setbufline(b, 4, ['d', 'e']))
   call assert_equal(['c'], getbufline(b, 3))
   call assert_equal(['d'], getbufline(b, 4))

src/testdir/test_messages.vim

@@ -1,5 +1,7 @@
 " Tests for :messages, :echomsg, :echoerr
 
+source shared.vim
+
 function Test_messages()
   let oldmore = &more
   try
@@ -92,3 +94,34 @@ func Test_echoerr()
   call assert_match("function('<lambda>\\d*')", execute(':echoerr {-> 1234}'))
   call test_ignore_error('RESET')
 endfunc
+
+func Test_mode_message_at_leaving_insert_by_ctrl_c()
+  if !has('terminal') || has('gui_running')
+    return
+  endif
+
+  " Set custom statusline built by user-defined function.
+  let testfile = 'Xtest.vim'
+  call writefile([
+        \ 'func StatusLine() abort',
+        \ '  return ""',
+        \ 'endfunc',
+        \ 'set statusline=%!StatusLine()',
+        \ 'set laststatus=2',
+        \ ], testfile)
+
+  let rows = 10
+  let buf = term_start([GetVimProg(), '--clean', '-S', testfile], {'term_rows': rows})
+  call term_wait(buf, 200)
+  call assert_equal('run', job_status(term_getjob(buf)))
+
+  call term_sendkeys(buf, "i")
+  call WaitForAssert({-> assert_match('^-- INSERT --\s*$', term_getline(buf, rows))})
+  call term_sendkeys(buf, "\<C-C>")
+  call WaitForAssert({-> assert_match('^\s*$', term_getline(buf, rows))})
+
+  call term_sendkeys(buf, ":qall!\<CR>")
+  call WaitForAssert({-> assert_equal('dead', job_status(term_getjob(buf)))})
+  exe buf . 'bwipe!'
+  call delete(testfile)
+endfunc

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1189,
 /**/
     1188,
 /**/