commit https://github.com/vim/vim/commit/821179809d9b0f65177360b53584be2b4039dd46 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 27 19:21:48 2016 +0200 patch 7.4.2270 Problem: Insufficient testing for NUL bytes on a raw channel. Solution: Add a test for writing and reading.

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