locate: can not stat () `/var/lib/mlocate/mlocate.db': No such file or directory

The binary database used by locate (/var/lib/mlocate/mlocate.db) is updated
once daily by cron, so locate will not find new files.

1. You can fix this by first running sudo updatedb
sudo updatedb && locate -e bench-repo

2. It's a good idea to use the -e flag so you only find files that still exist.

3. Oh and here's a bonus tip - you can get locate to give you a detailed listing 
by passing to ls -l

ls -l $(locate -e bench-repo)