cfor: 	i=1 	x=4 at d:/exp/pm_closure2.pl line 11.
cfor: 	i=2 	x=4 at d:/exp/pm_closure2.pl line 11.
cfor: 	i=3 	x=4 at d:/exp/pm_closure2.pl line 11.
while: 	i=1 	x=3 at d:/exp/pm_closure2.pl line 25.
while: 	i=2 	x=3 at d:/exp/pm_closure2.pl line 25.
while: 	i=3 	x=3 at d:/exp/pm_closure2.pl line 25.