But even if you put all the lines in different scopes (no warnings then), it's still the same variable when using our:

...as long as the alias refers to the same package variable. An our in an inner scope creates a new alias:

our $foo;
{
  our $foo = 'foo'; say $foo;
}
{
  package Foo;
  our $foo = 'bar'; say $foo;
}
package main; say $foo;
package Foo; say $foo;
{
  package Foo;
  our $foo; say $foo;
  {
    package Bar;
    our $foo = 'quux'; say $foo;
  }
  say $foo;
}
{
  package Foo;
  say $foo;
}
__END__
foo
bar
foo
foo
bar
quux
bar
foo
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