[Fix] no-arrow-function-lifecycle: prevent crashing on ClassProperty

Fixes #3093

Author: AriPerkkio

lib/rules/no-arrow-function-lifecycle.js

@@ -44,6 +44,10 @@ module.exports = {
      */
     function reportNoArrowFunctionLifecycle(properties) {
       properties.forEach((node) => {
+        if (!node || !node.value) {
+          return;
+        }
+
         const propertyName = astUtil.getPropertyName(node);
         const nodeType = node.value.type;
         const isLifecycleMethod = (

tests/lib/rules/no-arrow-function-lifecycle.js

@@ -347,6 +347,16 @@ ruleTester.run('no-arrow-function-lifecycle', rule, {
           render: function() { return <div />; }
         });
       `
+    },
+    {
+      code: `
+      import * as React from "react";
+
+      export class MyComponent extends React.Component {
+        onChange: () => void;
+      }
+      `,
+      parser: parsers['@TYPESCRIPT_ESLINT']
     }
   ],