Bug Report: Too many untracked files (gitignore)

The relevant repo is here:
https://github.com/blevinstein/dotfiles

My gitignore file looks like this:
https://github.com/blevinstein/dotfiles/blob/2400ca8642a7b454a2bfc54e8402343d008836aa/.gitignore
It basically ignores all files, except for specifically whitelisted
files. However, when I run "git status" (git version
2.8.0.rc3.226.g39d4020), I see the following untracked files:

#       .bash_history
#       .bash_logout
#       .cache/
#       [private]
#       [private]
#       .profile
#       .viminfo
#       dev/

I can fix this by removing the following line from my gitignore:

!.vim/colors/*
after which all the untracked files disappear. I also tried changing
that line to:

!.vim/colors/twilight256.vim

but it had no effect.

The same effect can be achieved with any directory name starting with a period:

!.tmux/asdf

!.vim/asdf

where .tmux and .vim are real directories. It does not seem to matter
whether the "asdf" subdirectory exists at all.

Brian Levinstein

blevinstein@gmail.com | bpl4ab@virginia.edu
(703) 673-8711
Google | Software Engineer
University of Virginia | MS Commerce 2014
University of Virginia | BS Computer Science 2013
Alpha Tau Omega | Delta Chapter
http://www.linkedin.com/pub/brian-levinstein/14/620/6ba
https://github.com/blevinstein