The post https://superuser.com/questions/752189/install-programs-from-command-line-on-windows has been closed and marked as a dupe. If you click on the dupe you'll see the post has been deleted.
Not sure if you'd consider it a bug, but IMO it is because when I click on it (and whilst not logged in) I get a Page Not Found... Why show me a duplicate if it's not found (which arguably means it's not a dupe)!