Nested error_page request

[Joel Eidsath]

Hello,

I'm trying to figure a way around a nested error_page request (which
doesn't seem to work). The problem is that I've got a memcached setup
that looks like this:

server {

        error_page   500 502    /site_media/flat/500.html;
        proxy_intercept_errors on;

        <snip>...

        location / {
                <snip>...
                set $memcached_key "http://domain.com$uri";
                memcached_pass <IP>:<PORT>;
                error_page 404 502 = @cache_miss;
        }

        location @cache_miss       { proxy_pass http://backend; }
}

The cache_miss error_page directive seems to disable my ability to set
a second error_page for 500 errors that then come from the backend. Is
there a way that I can make this work, either by modifying my
memcached setup or my error_page setup?

Joel