`Api_Common`确实`catch`了,但是`catch`没有继续把错误抛出,`catch`返回了一个新的`promise`,也就继续执行`Api_Account_Register`后面的`then`了 [MDN -Promise.catch](https://link.segmentfault.com/?enc=rNmUm1WGPoKXzLGimwurgA%3D%3D.iS3onXQVELyl3QGLbUMFb%2BK0GOUzKrusqF55bGBVOQslKXZlk6wNhj5eRxVlwPN%2FgcHzocU7UO7G4g11cZHX67%2F4MLJmRKGwceElSSbKknxLD1VVbk5xV1ZxEZmAoF2AuLgF20bqpQ%2BUIEX1Aus1KitTjwp%2FvVrWTk%2FkFm%2BR%2B6VnfyawyLMSuUonTS34dHEF)