ratelimit: avoid possible indexing of nil value (Fixes #498)

diff --git a/src/plugins/lua/ratelimit.lua b/src/plugins/lua/ratelimit.lua
index 2eb7f30a73a8bb6049ccb84321f7375faa62b4a9..24c3849136d91fbac3647626df28656b1e3e7e0f 100644 (file)
--- a/src/plugins/lua/ratelimit.lua
+++ b/src/plugins/lua/ratelimit.lua
@@ -252,7 +252,7 @@ local function rate_test_set(task, func)
   local from = task:get_from()
   local from_user = '<>'
   local from_addr = '<>'
-  if from and from[1]['addr'] then
+  if from and from[1] and from[1]['addr'] then
     from_user = from[1]['user']
     from_addr = from[1]['addr']
   end