var v *T           // v has value nil, static type *T
x = 42             // x has value 42 and dynamic type int
x = v              // x has value (*T)(nil) and dynamic type *T
</pre>

<p>
A variable's value is retrieved by referring to the variable in an
<a href="#Expressions">expression</a>; it is the most recent value
<a href="#Assignment_statements">assigned</a> to the variable.

  kind.

#### Behavioral Changes

 - For all kinds in the API group version, a spec.selector default value is no longer
 available, because it's incompatible with `kubectl
 apply` and strategic merge patch. You must explicitly set the spec.selector value
 in your manifest. An object with a spec.selector value that does not match the labels in
 its spec.template is invalid.

  * Restrict active deadline seconds max allowed value to be maximum uint32 to avoid overflow ([#46640](https://github.com/kubernetes/kubernetes/pull/46640), [@derekwaynecarr](https://github.com/derekwaynecarr))

- Added warnings about workload resources (Pods, ReplicaSets, Deployments, Jobs, CronJobs, or ReplicationControllers) whose names are not valid DNS labels. ([#114412](https://github.com/kubernetes/kubernetes/pull/114412),...

  - Clients should reload the token from disk periodically (once per minute is recommended) to ensure they continue to use a valid token. `k8s.io/client-go` version v11.0.0+ and v0.15.0+ reload tokens automatically.

* The new default value for the --allow-privileged parameter of the Kubernetes-worker charm has been set to true based on changes which went into the Kubernetes 1.10 release. Before this change the default value was set to false. If you're installing Canonical Kubernetes you should expect this value to now be true by default and you should now look to use PSP (pod security policies).  ([#64104](https://git...

- Kubeadm: Added missing cluster-info context validation to prevent panics when the user has a malformed kubeconfig in the cluster-info ConfigMap that excludes a valid current context. ([#134715](https://github.com/kubernetes/kubernetes/pull/134715), [@neolit123](https://github.com/neolit123))

- github.com/envoyproxy/go-control-plane: [v0.12.0 → v0.13.0](https://github.com/envoyproxy/go-control-plane/compare/v0.12.0...v0.13.0)
- github.com/envoyproxy/protoc-gen-validate: [v1.0.4 → v1.1.0](https://github.com/envoyproxy/protoc-gen-validate/compare/v1.0.4...v1.1.0)
- github.com/go-logfmt/logfmt: [v0.5.1 → v0.4.0](https://github.com/go-logfmt/logfmt/compare/v0.5.1...v0.4.0)

- Ingress objects are now persisted in etcd using the `networking.k8s.io/v1beta1` version...

* `kubectl wait` now supports condition value checks other than true using `--for condition=available=false` ([#69295](https://git...