commit https://github.com/vim/vim/commit/a890f5e34887bff7616bdb4b9ee0bf98c8d2a8f0 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 12 23:03:19 2016 +0200 patch 7.4.1926 Problem: Possible crash with many history items. Solution: Avoid the index going past the last item.

start:
test for empty string: ok
test for 1 char: ok
test for 3 chars: ok
test for contains meta char: ok
test for contains non-ascii char: ok