Fix incorrect unpacking of job data

queue.lua

@@ -324,10 +324,8 @@ function QlessQueue:pop(now, worker, count)
   -- queue itself and the priorities therein
   table.extend(jids, self.work.peek(count - #jids))
 
-  local state
   for index, jid in ipairs(jids) do
     local job = Qless.job(jid)
-    state = unpack(job:data('state'))
     job:history(now, 'popped', {worker = worker})
 
     -- Update the wait time statistics
@@ -908,7 +906,7 @@ function QlessQueue:invalidate_locks(now, count)
           ['message'] =
             'Job exhausted retries in queue "' .. self.name .. '"',
           ['when']    = now,
-          ['worker']  = unpack(job:data('worker'))
+          ['worker']  = job:data('worker')
         }))
 
         -- Add this type of failure to the list of failures