error_page can not work in if directive

[xinghua_hi]

I want to display different pages when 413 code return, for example

set $var 1;
if （$var = 1) {
     error_page 413 /413_old.html;
}
if ($var =2) {
    error_page 413 /413_new.html;
}

 error_page can not work, but I write error_page directive in location block
directly instead of using if directive, it can work normally

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,234417,234417#msg-234417