Ref https://bugs.launchpad.net/ubuntu/+source/python3.5/+bug/1650202 and https://github.com/python/typing/commit/7baf6fe2a6d96ab09c807aac174650baa35d15dd
Optional returns a Union, which can't be subclassed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1652113 Title: package maas-rack-controller 2.1.3+bzr5573-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/maas/+bug/1652113/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
