Why iterator doesn't work?

[alexeypetrushin]

How to make code below to work?
    
    
    import std/tables
    
    type
      Record = object
        tags: seq[string]
      
      Db = object
        records: seq[Record]
    
    proc stats*(records: iterator(): Record): CountTable[string] =
      for record in records():
        for tag in record.tags: result.inc tag
    
    echo Db().records.items.stats
    
    
    Run