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use strict;
use warnings;

...
func(2);
func(3);
func(4);

Variable "$strange" will not stay shared at closure2.pl line 10.
Variable "$strange" will not stay shared at closure2.pl line 15.
...
In subfunc1: Call 1 even even even
In subfunc2: Call 1 even even even even
In func (end): Call 4

use strict;
use warnings;
...
func(2);
func(3);
func(4);