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)

the first targets to make vim are: scratch config myself
srcdir = .
VIMNAME = vim
EXNAME = ex
VIEWNAME = view