I have a (somewhat esoteric) question about the usage of local in the context of the special form goto &SUB. Here is my example code: 

use strict;
use warnings;
use Data::Dumper;

sub s1 {
  print "Second: ",Dumper(@SomePackage::_data),"\n";
}

sub s0 {
  local @SomePackage::_data=(45,'D');
  print "First: ",Dumper(@SomePackage::_data),"\n";
  goto &s1;
}

s0

[download]
Running this program produces the following output: 
First: $VAR1 = 45;
$VAR2 = 'D';

Second:

[download]
I do not understand why @SomePackage::_data is empty within s1.

My understanding of local is that it creates a new copy of _data, which shadows the previous one until the end of the current sub. This new copy of _data is visible in this subroutine and all subs called from this one (unless, of course, shadowed by a new local declaration.

My understanding of goto &s1 is that control is transfered to the subroutine s1 without any change in the stack.

Therefore, since _data is non-empty within s0, it should be non-empty within s1. Where do I make a mistake here?

-- 
Ronald Fischer <ynnor@mm.st>

In reply to goto &sub and local question by rovf

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