[Bro] Using for loop w/ &expire_func

[Josh Liburdi]

I'm having a problem iterating over a table in an &expire_func function. I
receive this error: "value used but not set (t)"

When using this function with my table...

&expire_func=function(t: table[string] of set[string,string,addr], idx:
string): interval
          {
          for ( [x,y,z] in t[idx] )
            {
            print x;
            }
          return 0secs;
          };

Iterating over the table works with events, but I'd like to process indexes
as they are removed from the table. Has anyone run into this before or know
what might be causing the error?
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