commit https://github.com/vim/vim/commit/d56374e25df0b317b01423a01f158157faa647fa Author: Bram Moolenaar <Bram@vim.org> Date: Thu Apr 7 22:16:30 2016 +0200 patch 7.4.1718 Problem: Coverity: not using return value of set_ref_in_item(). Solution: Use the return value.

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