HHVM WSOD（白屏），SOME页面没有错误

I have try to move from Apache + cli_php to NGINX+HHVM(3.8) on Debian. The problem is HHVM couldn't load some includes (/var/www/site/inc/inc.php).

/var/www/site/index.php
             /inc/inc.php

Browser error is 502 Bad Gateway.

I tried to set these options in server.ini with no luck. Does it make any sense?

hhvm.sandbox.directories_root = /
hhvm.source_root = /
hhvm.sandbox.home = /
hhvm.server.always_use_relative_path = false

nginx:

server {
        server_name localhost;
        root /var/www/site;
        index index.php;
        location / {
                try_files $uri $uri/ /index.php?$args;
        }
        include hhvm.conf; #standard 3.8
}

In addition, did I mention right that in error messages HHVM remove first part of the include path before actually site-root?

The problem was in DOS endline characters. Look like HHVM doesn't interpret it right. In browser you get 502 Bad Gateway error, but terminal hhvm error is file not found. Also strange -- if there is echo output in that included file -- problem disappear.

So I convert included file with dos2unix and problem has been solved.

To find out all php files and convert it to unix-style, run this in the root directory of the site:

apt-get install dos2unix    
find . -name "*.php" -exec dos2unix {} \;