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.
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index d856d32..6db3bf7 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -152,6 +152,11 @@
   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 @@
   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