HTTP Redis, SSI and error log

[vchav]

Hello,

I am trying to use the http redis module for nginx basically like :
[code]
set $redis_key "$key";
redis_pass redisbackend;
default_type   text/html;
error_page 404 502 504 = @fallback;
[/code]

But I have a curious message in error log !?
[code]
2011/01/21 17:45:38 [alert] 25902#0: *125149 unknown variable index: -1,
client: XXX.XXX.XXX.XXX, server: _, request: "GET /myUri/ HTTP/1.1",
subrequest: "/MySubrequest/", host: "Myhost"
[/code]

How to remove it ?

Thanks in advance

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,168303,168303#msg-168303