Unwrap node in get tag to return proper tag at root level

pkg/yqlib/operator_tag.go

@@ -42,7 +42,7 @@ func GetTagOperator(d *dataTreeNavigator, matchingNodes *list.List, pathNode *Pa
 
 	for el := matchingNodes.Front(); el != nil; el = el.Next() {
 		candidate := el.Value.(*CandidateNode)
-		node := &yaml.Node{Kind: yaml.ScalarNode, Value: candidate.Node.Tag, Tag: "!!str"}
+		node := &yaml.Node{Kind: yaml.ScalarNode, Value: UnwrapDoc(candidate.Node).Tag, Tag: "!!str"}
 		lengthCand := &CandidateNode{Node: node, Document: candidate.Document, Path: candidate.Path}
 		results.PushBack(lengthCand)
 	}

pkg/yqlib/operator_tag_test.go

@@ -18,6 +18,14 @@ var tagOperatorScenarios = []expressionScenario{
 			"D0, P[f], (!!str)::'!!seq'\n",
 		},
 	},
+	{
+		skipDoc:    true,
+		document:   `{a: cat, b: 5, c: 3.2, e: true, f: []}`,
+		expression: `tag`,
+		expected: []string{
+			"D0, P[], (!!str)::'!!map'\n",
+		},
+	},
 	{
 		description: "Convert numbers to strings",
 		document:    `{a: cat, b: 5, c: 3.2, e: true}`,