Ensuring tests pass with updated code.

Signed-off-by: quobix <dave@quobix.com>

Author: daveshanley

index/extract_refs.go

@@ -329,11 +329,12 @@ func (index *SpecIndex) ExtractRefs(node, parent *yaml.Node, seenPath []string,
 				// capture enums
 				if n.Value == "enum" {
 
-					lastItem := seenPath[len(seenPath)-1]
-					if lastItem == "properties" {
-						continue
+					if len(seenPath) > 0 {
+						lastItem := seenPath[len(seenPath)-1]
+						if lastItem == "properties" {
+							continue
+						}
 					}
-
 					// all enums need to have a type, extract the type from the node where the enum was found.
 					_, enumKeyValueNode := utils.FindKeyNodeTop("type", node.Content)