commit https://github.com/vim/vim/commit/156919f99afd1ac11d19d4270afbc1afb7245640 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Oct 15 20:46:20 2016 +0200 patch 8.0.0039 Problem: When Vim 8 reads an old viminfo and exits, the next time marks are not read from viminfo. (Ned Batchelder) Solution: Set a mark when it wasn't set before, even when the timestamp is zero. (closes #1170)

" Common preparations for running tests.

" Make sure 'runtimepath' and 'packpath' does not include $HOME.
set rtp=$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after
if has('packages')
  let &packpath = &rtp
endif

" Only when the +eval feature is present. 
if 1
  " Make sure $HOME does not get read or written.
  let $HOME = '/does/not/exist'
endif