commit https://github.com/vim/vim/commit/06b0734d9cd2f39d4c12c7fd89a100eadbe5be78 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 31 22:26:28 2015 +0100 patch 7.4.1014 Problem: fnamemodify('.', ':.') returns an empty string in Cygwin. Solution: Use CCP_RELATIVE in the call to cygwin_conv_path. (Jacob Niehus, closes https://github.com/vim/vim/issues/505)

Test for search('multi-byte char', 'bce')

STARTTEST
:source small.vim
:source mbyte.vim
:set encoding=utf-8
:/^Test bce:/+1
:$put =search('Ａ', 'bce', line('.'))
:1;/^Results:/,$wq! test.out
ENDTEST

Results:

Test bce:
Ａ