fix(nested): Prevent infinite loops in getPath

packages/vuetify/src/components/VTreeview/VTreeview.ts

@@ -28,6 +28,7 @@ import {
   filterTreeItems,
   filterTreeItem,
 } from './util/filterTreeItems'
+import { preventLoops } from '@/util/nested'
 
 type VTreeviewNodeInstance = InstanceType<typeof VTreeviewNode>
 
@@ -307,6 +308,7 @@ export default mixins(
 
       const parents = []
       while (parent !== null) {
+        preventLoops(parents, parent)
         parents.push(parent)
         parent = this.nodes[parent].parent
       }

packages/vuetify/src/composables/nested/nested.ts

@@ -18,6 +18,7 @@ import {
   leafSingleSelectStrategy,
 } from './selectStrategies'
 import { getCurrentInstance, getUid, propsFactory } from '@/util'
+import { preventLoops } from '@/util/nested'
 
 // Types
 import type { InjectionKey, PropType, Ref } from 'vue'
@@ -182,6 +183,7 @@ export const useNested = (props: NestedProps) => {
     let parent: unknown = id
 
     while (parent != null) {
+      preventLoops(path, parent)
       path.unshift(parent)
       parent = parents.value.get(parent)
     }

packages/vuetify/src/labs/VTreeview/VTreeview.tsx

@@ -10,6 +10,7 @@ import { useProxiedModel } from '@/composables/proxiedModel'
 // Utilities
 import { computed, provide, ref, toRaw, toRef } from 'vue'
 import { genericComponent, omit, propsFactory, useRender } from '@/util'
+import { preventLoops } from '@/util/nested'
 
 // Types
 import { VTreeviewSymbol } from './shared'
@@ -98,6 +99,7 @@ export const VTreeview = genericComponent<new <T>(
       const path: unknown[] = []
       let parent: unknown = id
       while (parent != null) {
+        preventLoops(path, parent)
         path.unshift(parent)
         parent = vListRef.value?.parents.get(parent)
       }

packages/vuetify/src/util/nested.ts

@@ -0,0 +1,9 @@
+export function preventLoops<T> (path: T[] | Set<T> | Map<T, any>, itemToPush: T) {
+  if (
+    (Array.isArray(path) && path.includes(itemToPush)) ||
+    (path instanceof Set && path.has(itemToPush)) ||
+    (path instanceof Map && path.has(itemToPush))
+  ) {
+    throw new Error('[Vuetify] Could not resolve nested path because of duplicated identifiers')
+  }
+}