test/issues/velocity-285/templates/velocity285.vm

<pre>
#macro (test_loop $p)
call to test_loop ($p)
#foreach($child in $p)
    in the loop the param should not be changed : ($p)
#test_loop($child)
#end
return
#end

#set($l1=["a","b"])
#set($l = [$l1,$l1])
#test_loop($l)
</pre>