Container inspection is caching data on first lookup. This will result in incorrect data being returned on subsequent lookups if a different `cid` value is provided. Also removed rescue of the `Exception` class as this generally should never happen; rescue of StandardError will be enough.
Vagrant Core Plugins
These are plugins that ship with Vagrant. Vagrant core uses its own plugin system to power a lot of the core pieces that ship with Vagrant. Each plugin will have its own README which explains its specific role.