The module is highly magical... I don't really understand it either but 
use strict;
use warnings;
use IO::All;
use feature qw(say);

my $io = io('/home/vic');
say *$io->{_constructor};

my $io2 = IO::All->new();
$io2->dir('/home/vic/');
say *$io2->{_constructor};

__END__
CODE(0x16de930)
Use of uninitialized value in say at karl.pl line 14.

[download]
Seems to me the $io2 lacks the field _constructor simply because nothing sets it... so I don't know if it should even work.

In reply to Re: Strange IO::All constructor behavior? by Anonymous Monk
in thread Strange IO::All constructor behavior? by karlgoethebier

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