lua nginx and try_files

I have Lua script that manipulates cookies and headers based at GET parameters.

This script didnt work well at one location, strangely the ngx.var.args was empty with ordinary request.

The trick was that in location we have:

  location /x/ {
    header_filter_by_lua_file /etc/nginx/lua/referrer_cookie.lua;
    rewrite ^/x/(.*) /$1 break;
    try_files $uri /x/index.htm;
    }
    
 in which request went to index.html and all GETs got stripped. Solution was to add $args to the request: 
  location /x/ {
    header_filter_by_lua_file /etc/nginx/lua/referrer_cookie.lua;
    rewrite ^/x/(.*) /$1 break;
    try_files $uri /x/index.htm$is_args$args;
    }