Fix: no-async-in-computed-properties with empty returns (#816)

Author: dougalg

lib/rules/no-async-in-computed-properties.js

@@ -138,8 +138,11 @@ module.exports = {
 
         'ReturnStatement' (node) {
           if (
-            node.argument.type === 'ObjectExpression' ||
-            node.argument.type === 'ArrayExpression'
+            node.argument &&
+            (
+              node.argument.type === 'ObjectExpression' ||
+              node.argument.type === 'ArrayExpression'
+            )
           ) {
             allowedScopes.push(node.argument)
           }

tests/lib/rules/no-async-in-computed-properties.js

@@ -25,6 +25,19 @@ const ruleTester = new RuleTester()
 ruleTester.run('no-async-in-computed-properties', rule, {
 
   valid: [
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          computed: {
+            foo: function () {
+              return;
+            },
+          }
+        }
+      `,
+      parserOptions
+    },
     {
       filename: 'test.vue',
       code: `