我正在使用Vagrant 1.85，在某些时候我收到消息告诉我升级我的盒子版本的ubuntu / trusty64这里是消息：
==> web02: A newer version of the box 'ubuntu/trusty64' is available! You currently
==> web02: have version '20160818.0.0'. The latest is version '20160822.0.0'. Run
==> web02: `vagrant box update` to update.
所以我运行了命令sudo vagrant box update，这是我收到的消息：
==> web02: Checking for updates to 'ubuntu/trusty64'
web02: Latest installed version: 20160818.0.0
web02: Version constraints:
web02: Provider: virtualbox
==> web02: Updating 'ubuntu/trusty64' with provider 'virtualbox' from version
==> web02: '20160818.0.0' to '20160822.0.0'...
==> web02: Loading metadata for box 'https://atlas.hashicorp.com/ubuntu/trusty64'
==> web02: Adding box 'ubuntu/trusty64' (v20160822.0.0) for provider: virtualbox
/opt/vagrant/embedded/lib/ruby/2.2.0/rubygems/version.rb:206:in `initialize': Malformed version number string temp (ArgumentError)
from /opt/vagrant/embedded/lib/ruby/2.2.0/rubygems/version.rb:198:in `new'
from /opt/vagrant/embedded/lib/ruby/2.2.0/rubygems/version.rb:198:in `new'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:284:in `block (3 levels) in find'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:284:in `each'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:284:in `all?'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:284:in `block (2 levels) in find'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:283:in `each'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:283:in `block in find'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:436:in `block in with_collection_lock'
from /opt/vagrant/embedded/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:435:in `with_collection_lock'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/box_collection.rb:268:in `find'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/action/builtin/box_add.rb:302:in `box_add'
.....
升级似乎没有完成，有些人可以解释一下这实际上是什么？
谢谢 佩里