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)

Test for writing and reading a file of over 100 Kbyte

1 line: "This is the start"
3001 lines: "This is the leader"
1 line: "This is the middle"
3001 lines: "This is the trailer"
1 line: "This is the end"

STARTTEST
:%d
aThis is the start
This is the leader
This is the middle
This is the trailer
This is the endkY3000p2GY3000p
:w! Xtest
:%d
:e! Xtest
:.w! test.out
3003G:.w >>test.out
6005G:.w >>test.out
:qa!
ENDTEST