action驼峰命名404 [ 2.0 版本 ]

比如PassportController的action命名为actionDoLogin时，访问r=passport/doRegister会404，什么鬼？

2015-07-23 01:02:49 [::1][-][-][error][yii\web\HttpException:404] exception 'yii\base\InvalidRouteException' with message 'Unable to resolve the request: passport/doRegister' in D:\sinaapp\haloz\2\vendor\yiisoft\yii2\base\Controller.php:122
Stack trace:
#0 D:\sinaapp\haloz\2\vendor\yiisoft\yii2\base\Module.php(455): yii\base\Controller->runAction('doRegister', Array)
#1 D:\sinaapp\haloz\2\vendor\yiisoft\yii2\web\Application.php(84): yii\base\Module->runAction('passport/doRegi...', Array)
#2 D:\sinaapp\haloz\2\vendor\yiisoft\yii2\base\Application.php(375): yii\web\Application->handleRequest(Object(yii\web\Request))
#3 D:\sinaapp\haloz\2\index.php(18): yii\base\Application->run()
#4 {main}

Next exception 'yii\web\NotFoundHttpException' with message 'Page not found.' in D:\sinaapp\haloz\2\vendor\yiisoft\yii2\web\Application.php:96
Stack trace:
#0 D:\sinaapp\haloz\2\vendor\yiisoft\yii2\base\Application.php(375): yii\web\Application->handleRequest(Object(yii\web\Request))
#1 D:\sinaapp\haloz\2\index.php(18): yii\base\Application->run()
#2 {main}
2015-07-23 01:02:49 [::1][-][-][info][application] $_GET = [
    'r' => 'passport/doRegister'
]