fix(kit): add null-safety check on process instance props, close #688

Author: webfansplz

packages/devtools-kit/src/core/component/state/process.ts

@@ -63,7 +63,7 @@ function processProps(instance: VueAppInstance) {
   const props: InspectorState[] = []
   const propDefinitions = instance?.type?.props
 
-  for (const key in instance.props) {
+  for (const key in instance?.props) {
     const propDefinition = propDefinitions ? propDefinitions[key] : null
     const camelizeKey = camelize(key)
     props.push({
@@ -96,7 +96,7 @@ function processProps(instance: VueAppInstance) {
  */
 function processState(instance: VueAppInstance) {
   const type = instance.type
-  const props = type.props
+  const props = type?.props
   const getters
     = type.vuex
     && type.vuex.getters