Merge pull request #58317 from nikhita/bump-go-yaml

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

bump(670d4c): gopkg.in/yaml.v2: fix parsing for non-specific tags

Fixes #56976

Fixes this bug - https://github.com/go-yaml/yaml/issues/75 - in `go-yaml`. The fix for this bug is at https://github.com/go-yaml/yaml/commit/670d4cfef0544295bc27a114dbac37980d83185a.

**Release note**:

```release-note
NONE
```

/cc sttts caesarxuchao jennybuckley

Kubernetes-commit: 4e2c3f060a873a0b727dbd3e66047a3b2858db97

vendor/gopkg.in/yaml.v2/decode.go

@@ -120,7 +120,6 @@ func (p *parser) parse() *node {
 	default:
 		panic("attempted to parse unknown event: " + strconv.Itoa(int(p.event.typ)))
 	}
-	panic("unreachable")
 }
 
 func (p *parser) node(kind int) *node {
@@ -191,6 +190,7 @@ type decoder struct {
 	aliases map[string]bool
 	mapType reflect.Type
 	terrors []string
+	strict  bool
 }
 
 var (
@@ -200,8 +200,8 @@ var (
 	ifaceType      = defaultMapType.Elem()
 )
 
-func newDecoder() *decoder {
-	d := &decoder{mapType: defaultMapType}
+func newDecoder(strict bool) *decoder {
+	d := &decoder{mapType: defaultMapType, strict: strict}
 	d.aliases = make(map[string]bool)
 	return d
 }
@@ -251,7 +251,7 @@ func (d *decoder) callUnmarshaler(n *node, u Unmarshaler) (good bool) {
 //
 // If n holds a null value, prepare returns before doing anything.
 func (d *decoder) prepare(n *node, out reflect.Value) (newout reflect.Value, unmarshaled, good bool) {
-	if n.tag == yaml_NULL_TAG || n.kind == scalarNode && n.tag == "" && (n.value == "null" || n.value == "") {
+	if n.tag == yaml_NULL_TAG || n.kind == scalarNode && n.tag == "" && (n.value == "null" || n.value == "" && n.implicit) {
 		return out, false, false
 	}
 	again := true
@@ -640,6 +640,8 @@ func (d *decoder) mappingStruct(n *node, out reflect.Value) (good bool) {
 			value := reflect.New(elemType).Elem()
 			d.unmarshal(n.children[i+1], value)
 			inlineMap.SetMapIndex(name, value)
+		} else if d.strict {
+			d.terrors = append(d.terrors, fmt.Sprintf("line %d: field %s not found in struct %s", n.line+1, name.String(), out.Type()))
 		}
 	}
 	return true