<a href="#Predeclared_identifiers"><code>nil</code></a>;
that case is selected when the expression in the TypeSwitchGuard
is a <code>nil</code> interface value.
There may be at most one <code>nil</code> case.
</p>

<p>
Given an expression <code>x</code> of type <code>interface{}</code>,
the following type switch:
</p>

<pre>
switch i := x.(type) {
case nil:

  // record of Assigned config is updated. If the Assigned config is Active at the end
  // of this period, it becomes the LastKnownGood. Note that if Spec.ConfigSource is
  // reset to nil (use local defaults), the LastKnownGood is also immediately reset to nil,
  // because the local default config is always assumed good.
  // You should not make assumptions about the node's method of determining config stability

- Omit nil or empty field when calculating container hash value to avoid hash changed. For a new field with a non-nil default value in the container spec, the hash would still get changed. ([#57741](https://github.com/kubernetes/kubernetes/pull/57741), [@dixudx](https://github.com/dixudx))

## Changelog since v1.12.5

### Other notable changes

* kubeadm: fixed nil pointer dereference caused by a bug in url parsing ([#74454](https://github.com/kubernetes/kubernetes/pull/74454), [@bart0sh](https://github.com/bart0sh))

- Avoid caching the Azure VMSS instances whose network profile is nil ([#100948](https://github.com/kubernetes/kubernetes/pull/100948), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]

* etcd client add dial timeout. ([#61459](https://github.com/kubernetes/kubernetes/pull/61459), [@hzxuzhonghu](https://github.com/hzxuzhonghu))
* nil admission options are now consistent with other nil options. ([#63993](https://github.com/kubernetes/kubernetes/pull/63993), [@tamalsaha](https://github.com/tamalsaha))

- Updates that remove remaining `metadata.finalizers` from  an object that is pending deletion (non-nil metadata.deletionTimestamp) and has no graceful deletion pending (nil or 0 metadata.deletionGracePeriodSeconds) now results in immediate deletion of the object. ([#77952](https://github.com/kubernetes/kubernetes/pull/77952), [@liggitt](https://github.com/liggitt))

* Automated cherry pick of [#49259](https://github.com/kubernetes/kubernetes/pull/49259): update json-patch to fix nil value issue when creating mergepatch ([#59324](https://github.com/kubernetes/kubernetes/pull/59324), [@yue9944882](https://github.com/yue9944882))

- Ignore context canceled from validate and mutate webhook ([#120020](https://github.com/kubernetes/kubernetes/pull/120020), [@divyasri537](https://github.com/divyasri537)) [SIG API Machinery]
- Kubeadm: fix nil pointer when etcd member is already removed ([#120011](https://github.com/kubernetes/kubernetes/pull/120011), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

### Other (Cleanup or Flake)

- A customizable `OrderedScoreFuncs()` function was introduced. Out-of-tree plugins 
  that used the scheduler's preemption interface could implement this function
  for custom preemption preferences or return nil to keep the current behavior. ([#121867](https://github.com/kubernetes/kubernetes/pull/121867), [@lianghao208](https://github.com/lianghao208))