Description:
When using last stable version of vim(8.0.0851-1), everything is fine.
After update to latest stable version(8.0.0987-1), vim will decrease the first number by 1 in a very high probability(almost every time) when opening any file, eg. num0 -> num-1, dev3 -> dev2
Tried remove vim and remove all config file, do not change behavior.
Tried downgrade vim to last stable version(8.0.0851-1), this behavior disappears.


Additional info:
$ uname -a
Linux arch-min 4.12.8-2-ARCH #1 SMP PREEMPT Fri Aug 18 14:08:02 UTC 2017 x86_64 GNU/Linux
packages:
vim-runtime-8.0.0987-1-x86_64
vim-8.0.0987-1-x86_64
Configs:
All default vim config.
~/.bashrc only has some alias. Nothing about vim.
Cygwin and msys2 from windows, ssh connected to 2 arch machines.
Using tuna mirror(checksum is the same with upstream so I think it's not the problem).
Counldn't see any environment variable related to vim.


Steps to reproduce:
[begin]
$ sudo pacman -S vim
***
Packages (2) vim-8.0.0987-1 vim-runtime-8.0.0987-1
***
$ touch text
$ echo num0 > text
$ cat text
num0
$ vim text
num-1
[here vim is showing "num-1", and try to exit using `:q` will pop up "E37: No write since last change"]
:wq
$ cat text
num-1
[end]

Please contact if more info is needed.
Might reply late, apologize for that.