Fix crash in ES5 components detection (fixes #286)

Author: yannickcr

lib/util/Components.js

@@ -110,7 +110,7 @@ function componentRule(rule, context) {
      * @returns {Boolean} True if the node is a React ES5 component, false if not
      */
     isES5Component: function(node) {
-      return sourceCode.getText(node.parent.callee) === 'React.createClass';
+      return node.parent && sourceCode.getText(node.parent.callee) === 'React.createClass';
     },
 
     /**

tests/lib/rules/prop-types.js

@@ -1471,6 +1471,20 @@ ruleTester.run('prop-types', rule, {
       errors: [
         {message: '\'text\' is missing in props validation'}
       ]
+    }, {
+      code: [
+        'for (var key in foo) {',
+        '  var Hello = React.createClass({',
+        '    render: function() {',
+        '      return <div>Hello {this.props.name}</div>;',
+        '    }',
+        '  });',
+        '}'
+      ].join('\n'),
+      parser: 'babel-eslint',
+      errors: [
+        {message: '\'name\' is missing in props validation'}
+      ]
     }
   ]
 });