当php出现错误提示的时候该怎么从这些提示去分析问题

Fatal error: Call-time pass-by-reference has been removed in D:\wamp\www\xxx\admin\Lib\Action\IndexAction.class.php on line 38
Call Stack
# Time Memory Function Location
1 0.0006 248088 {main}( ) ..\admin.php:0
2 0.0010 261440 require( 'D:\wamp\www\xxx\ThinkPHP\ThinkPHP.php' ) ..\admin.php:7
3 0.0022 358528 require( 'D:\wamp\www\xxx\ThinkPHP\Common\runtime.php' ) ..\ThinkPHP.php:32
4 0.0074 593880 Think::Start( ) ..\runtime.php:237
5 0.0154 1029136 App::run( ) ..\Think.class.php:47
6 0.0172 1066624 App::exec( ) ..\App.class.php:159
7 0.0172 1067000 A( ) ..\App.class.php:96
8 0.0172 1067224 import( ) ..\common.php:274
9 0.0172 1068752 require_cache( ) ..\common.php:143