mod_register: Make sure only an on_evict function or nil is passed to util.cache

diff --git a/plugins/mod_register.lua b/plugins/mod_register.lua
index e4b4bd51e0679a642cf70511adefceb34cf3f182..fda717f723cdb7be53abdc0a314de9b0a63dd487 100644 (file)
--- a/plugins/mod_register.lua
+++ b/plugins/mod_register.lua
@@ -187,7 +187,7 @@ local throttle_cache = new_cache(throttle_cache_size, blacklist_overflow and fun
                module:log("info", "Adding ip %s to registration blacklist", ip);
                blacklisted_ips[ip] = true;
        end
-end);
+end or nil);
 
 local function check_throttle(ip)
        if not throttle_max then return true end