patch 7.4.1180
Problem:    Crash with invalid argument to glob2regpat().
Solution:   Check for NULL. (Justin M. Keyes, closes #596)  Add a test.
diff --git a/src/testdir/test_alot.vim b/src/testdir/test_alot.vim
index aceb073..9745433 100644
--- a/src/testdir/test_alot.vim
+++ b/src/testdir/test_alot.vim
@@ -5,6 +5,7 @@
 source test_cursor_func.vim
 source test_delete.vim
 source test_expand.vim
+source test_glob2regpat.vim
 source test_json.vim
 source test_lispwords.vim
 source test_menu.vim