#!/usr/bin/gawk -f

BEGIN {

     for (i = 0; i < 100; i++)

         func_exec()

}

function func_exec(opaque)

{

     func_a(1, opaque)    #set additional argument, not expected by fname

}

function func_a(a,    b, loc1, loc2)

{

     b = 0            #unref Nnull_string

}