Warning: preg_match(): Compilation failed: unmatched parentheses at offset 12

in app/cache/dev/classes.php at line 3019

错误代码如下

#var_dump($this->path,$request->getPathInfo());die();

if (null !== $this->path && !preg_match('{'.$this->path.'}', rawurldecode($request->getPathInfo()))) {

return false;

}

if (null !== $this->host && !preg_match('{'.$this->host.'}i', $request->getHost())) {

相关配置

secured_area:

            pattern: ^/

调试了下就是这个地方出错的，

求解决