This is the leaking to which I was refering: 
$Foo::var = 'foo!';
$Bar::var = 'bar!';
package Foo;
our $var;
package Bar;
print("$var\n");  # foo!

[download]
$Foo::var = 'foo!';
$Bar::var = 'bar!';
{
   package Foo;
   our $var;
}
{
   package Bar;
   print("$var\n");  # bar!
}

[download]

In reply to Re^6: Overridding subroutines called in private subroutines by ikegami
in thread Overridding subroutines called in private subroutines by skazat

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