Fix require-render-return crash (fixes #589)

Author: yannickcr

lib/rules/require-render-return.js

@@ -49,9 +49,10 @@ module.exports = Components.detect(function(context, components, utils) {
     if (node.type === 'ClassProperty') {
       var tokens = context.getFirstTokens(node, 2);
       return tokens[1] && tokens[1].type === 'Identifier' ? tokens[1].value : tokens[0].value;
+    } else if (['MethodDefinition', 'Property'].indexOf(node.type) !== -1) {
+      return node.key.name;
     }
-
-    return node.key.name;
+    return '';
   }
 
   /**

tests/lib/rules/require-render-return.js

@@ -78,6 +78,15 @@ ruleTester.run('require-render-return', rule, {
       '}'
     ].join('\n'),
     parserOptions: parserOptions
+  }, {
+    // Stateless arrow function
+    code: [
+      'var Hello = () => (',
+      '  <div></div>',
+      ');'
+    ].join('\n'),
+    parser: 'babel-eslint',
+    parserOptions: parserOptions
   }, {
     // Return in a switch...case
     code: [