It looks like add-apt-repository doesn't seem to set the http_proxy variable for GPG, so if you're behind a proxy the keyserver is always 'down'. The process hangs and the only signal it seems to respond to is -9 (C-\).
-- add-apt-repository insists on downloading GPG key even if keyserver is down. If keyserver is down, add-apt-repository can't proceed. https://bugs.launchpad.net/bugs/443404 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
