patch 7.4.2300

Problem:    Get warning for deleting autocommand group when the autocommand
            using the group is scheduled for deletion. (Pavol Juhas)
Solution:   Check for deleted autocommand.

src/fileio.c

@@ -8018,7 +8018,7 @@ au_del_group(char_u *name)
 					    event = (event_T)((int)event + 1))
 	{
 	    for (ap = first_autopat[(int)event]; ap != NULL; ap = ap->next)
-		if (ap->group == i)
+		if (ap->group == i && ap->pat != NULL)
 		{
 		    give_warning((char_u *)_("W19: Deleting augroup that is still in use"), TRUE);
 		    in_use = TRUE;

src/testdir/test_autocmd.vim

@@ -152,6 +152,11 @@ func Test_early_bar()
   call assert_equal(1, len(split(execute('au vimBarTest'), "\n")))
 endfunc
 
+func RemoveGroup()
+  autocmd! StartOK
+  augroup! StartOK
+endfunc
+
 func Test_augroup_warning()
   augroup TheWarning
     au VimEnter * echo 'entering'
@@ -167,4 +172,14 @@ func Test_augroup_warning()
   augroup Another
   augroup END
   call assert_true(match(execute('au VimEnter'), "-Deleted-.*VimEnter") >= 0)
+
+  " no warning for postpone aucmd delete
+  augroup StartOK
+    au VimEnter * call RemoveGroup()
+  augroup END
+  call assert_true(match(execute('au VimEnter'), "StartOK.*VimEnter") >= 0)
+  redir => res
+  doautocmd VimEnter
+  redir END
+  call assert_true(match(res, "W19:") < 0)
 endfunc

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2300,
 /**/
     2299,
 /**/