Fix require-render-return crash (fixes #784)

Author: yannickcr

lib/rules/require-render-return.js

@@ -73,7 +73,7 @@ module.exports = {
     function hasRenderMethod(node) {
       var properties = getComponentProperties(node);
       for (var i = 0, j = properties.length; i < j; i++) {
-        if (getPropertyName(properties[i]) !== 'render') {
+        if (getPropertyName(properties[i]) !== 'render' || !properties[i].value) {
           continue;
         }
         return /FunctionExpression$/.test(properties[i].value.type);

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

@@ -141,6 +141,14 @@ ruleTester.run('require-render-return', rule, {
       '});'
     ].join('\n'),
     parserOptions: parserOptions
+  }, {
+    // Invalid render method (but accepted by Babel)
+    code: [
+      'class Foo extends Component {',
+      '  render',
+      '}'
+    ].join('\n'),
+    parser: 'babel-eslint'
   }],
 
   invalid: [{