patch 8.1.0469: too often indexing in qf_lists[]
Problem: Too often indexing in qf_lists[].
Solution: Use a qf_list_T pointer. (Yegappan Lakshmanan)
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 2b3c1a0..4d7987d 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -558,6 +558,8 @@
" Search for non existing help string
call assert_fails('Xhelpgrep a1b2c3', 'E480:')
+ " Invalid regular expression
+ call assert_fails('Xhelpgrep \@<!', 'E480:')
endfunc
func Test_helpgrep()