// another n bytes. After Grow(n), at least n bytes can be written to the
// buffer without another allocation.
// If n is negative, Grow will panic.
// If the buffer can't grow it will panic with [ErrTooLarge].
func (b *Buffer) Grow(n int) {
	if n < 0 {
		panic("bytes.Buffer.Grow: negative count")
	}
	m := b.grow(n)
	b.buf = b.buf[:m]
}

// Write appends the contents of p to the buffer, growing the buffer as

The [GODEBUG History](#history) gives the exact defaults for each Go toolchain version.
For example, Go 1.21 introduces the `panicnil` setting,
controlling whether `panic(nil)` is allowed;
it defaults to `panicnil=0`, making `panic(nil)` a run-time error.
Using `panicnil=1` restores the behavior of Go 1.20 and earlier.

When compiling a work module or workspace that declares

At that point, the program is terminated and the error
condition is reported, including the value of the argument to <code>panic</code>.
This termination sequence is called <i>panicking</i>.
</p>

<pre>
panic(42)
panic("unreachable")
panic(Error("cannot parse"))
</pre>

<p>
The <code>recover</code> function allows a program to manage behavior
of a panicking goroutine.

func TestNegativeRead(t *testing.T) {
	// should panic with a description pointing at the reader, not at itself.
	// (should NOT panic with slice index error, for example.)
	b := NewReader(new(negativeReader))
	defer func() {
		switch err := recover().(type) {
		case nil:
			t.Fatal("read did not panic")
		case error:

		return nil, errFileNotFound
	}
	var dst xlMetaV2Version
	_, err = dst.unmarshalV(x.metaV, x.versions[idx].meta)
	if false {
		if err == nil && x.versions[idx].header.VersionID != dst.getVersionID() {
			panic(fmt.Sprintf("header: %x != object id: %x", x.versions[idx].header.VersionID, dst.getVersionID()))
		}
	}
	return &dst, err
}

// setIdx will replace a version at a given index.

- Fixed node lifecycle controller panic when conditionType ready is been patch `nil` by mistake. ([#122874](https://github.com/kubernetes/kubernetes/pull/122874), [@fusida](https://github.com/fusida))
- Fixed panic of Evented `PLEG` during kubelet start-up. ([#122475](https://github.com/kubernetes/kubernetes/pull/122475), [@pacoxu](https://github.com/pacoxu))

- Kubeadm: fix panic in the command "kubeadm certs check-expiration" when "/etc/kubernetes/pki" exists but cannot be read. ([#124124](https://github.com/kubernetes/kubernetes/pull/124124), [@carlory](https://github.com/carlory)) [SIG Cluster Lifecycle]

		err = store.loadMappedPolicy(ctx, accessKey, userType, false, cache.iamUserPolicyMap)
	default:
		// This is just to ensure that we have covered all cases for new
		// code in future.
		panic("unknown user type")
	}
	// Ignore policy not mapped error
	if err != nil && !errors.Is(err, errNoSuchPolicy) {
		return err
	}

	return nil
}

- Fixes a bug in the `k8s.io/cloud-provider/service`  controller, it may panic when a service is updated because the event recorder was used before it was initialized. All cloud providers should using the `v1.31.0` cloud provider service controller must ensure that the controllers is initialized before the informer start to process...

- Kubeadm: fix panic in the command "kubeadm certs check-expiration" when "/etc/kubernetes/pki" exists but cannot be read. ([#124124](https://github.com/kubernetes/kubernetes/pull/124124), [@carlory](https://github.com/carlory)) [SIG Cluster Lifecycle]