PPI::Statement::Variable not detected inside an open() call without parenthesis

When parsing an open my $fh ... function without parenthesis, PPI does not identify the $fh as a variable (PPI::Statement::Variable) but as a symbol instead (PPI::Token::Symbol).

Example:

use strict;
use warnings;

use PPI::Dumper;
use PPI::Document;

print "call open() with parenthesis\n";
my $doc_good = PPI::Document->new(\'open(my $foo, "<", "/etc/motd");');
PPI::Dumper->new($doc_good)->print;

print "call open() with NO parenthesis\n";
my $doc_bad= PPI::Document->new(\'open my $foo, "<", "/etc/motd";');
PPI::Dumper->new($doc_bad)->print;

Output:

call open() with parenthesis
PPI::Document
  PPI::Statement
    PPI::Token::Word    'open'
    PPI::Structure::List        ( ... )
      PPI::Statement::Variable
        PPI::Token::Word        'my'
        PPI::Token::Whitespace          ' '
        PPI::Token::Symbol      '$foo'
        PPI::Token::Operator    ','
        PPI::Token::Whitespace          ' '
        PPI::Token::Quote::Double       '"<"'
        PPI::Token::Operator    ','
        PPI::Token::Whitespace          ' '
        PPI::Token::Quote::Double       '"/etc/motd"'
    PPI::Token::Structure       ';'

call open() with NO parenthesis
PPI::Document
  PPI::Statement
    PPI::Token::Word    'open'
    PPI::Token::Whitespace      ' '
    PPI::Token::Word    'my'
    PPI::Token::Whitespace      ' '
    PPI::Token::Symbol          '$foo'
    PPI::Token::Operator        ','
    PPI::Token::Whitespace      ' '
    PPI::Token::Quote::Double   '"<"'
    PPI::Token::Operator        ','
    PPI::Token::Whitespace      ' '
    PPI::Token::Quote::Double   '"/etc/motd"'
    PPI::Token::Structure       ';'

Perl-Critic / PPI

PPI::Statement::Variable not detected inside an open() call without parenthesis #225