rbenv/ruby/bundler error on bundle install

[stevensona]

Hi. Not sure if this is the correct place to post this, but I ran into this issue and thought others may benefit from hearing what I did to fix it.

Fresh install of Bash on Windows 14371.rs1_release.160617-1723. Install rbenv latest, ruby 2.3.1, and bundler latest. Any attempt to run bundle fails with the following error: "ArgumentError: parent directory is world writable but not sticky". Following advice in this comment, I was able to resolve the issue by running the command find ~/.bundle/cache -type d -exec chmod 0755 {} +

[lateau]

I think this caused by umask 0000 on fresh WSL.
This is what I'm doing:

$ tail -n1 ~/.bashrc
umask 0022

[Tset-Noitamotua]

I reported a [similar issue on bundlers issue tracker](https://github.com/bundler/bundler/issues/4887) ... maybe its related.

[therealkenc]

Going to call @lateau's explanation authoritative.