patch 8.0.0042

Problem:    When using Insert mode completion with 'completeopt' containing
            "noinsert" change is not saved for undo.  (Tommy Allen)
Solution:   Call stop_arrow() before inserting for pressing Enter.

src/edit.c

@@ -857,8 +857,9 @@ edit(
 
 		/* Pressing CTRL-Y selects the current match.  When
 		 * compl_enter_selects is set the Enter key does the same. */
-		if (c == Ctrl_Y || (compl_enter_selects
+		if ((c == Ctrl_Y || (compl_enter_selects
-				   && (c == CAR || c == K_KENTER || c == NL)))
+				    && (c == CAR || c == K_KENTER || c == NL)))
+			&& stop_arrow() == OK)
 		{
 		    ins_compl_delete();
 		    ins_compl_insert(FALSE);

src/testdir/test_popup.vim

@@ -420,6 +420,13 @@ func Test_complete_no_undo()
   call feedkeys("u", 'xt')
   call assert_equal('', getline(2))
 
+  call feedkeys("ibbb\<Esc>0", 'xt')
+  call assert_equal('bbb', getline(2))
+  call feedkeys("A\<Right>\<Down>\<CR>\<Esc>", 'xt')
+  call assert_equal('January', getline(2))
+  call feedkeys("u", 'xt')
+  call assert_equal('bbb', getline(2))
+
   iunmap <Right>
   set completeopt&
   q!

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    42,
 /**/
     41,
 /**/