It helps to read the core modules whenever one does something contained therein in a different way. The source of AutoLoader gives a clue: The DESTROY symbol is handled specially... 

AUTOLOAD {
    my $sub = $AUTOLOAD;
    my $filename = AutoLoader::find_filename( $sub );

    my $save = $@;
    local $!; # Do not munge the value. 
    eval { local $SIG{__DIE__}; require $filename };
    if ($@) {
        if (substr($sub,-9) eq '::DESTROY') {
            no strict 'refs';
            *$sub = sub {};
            $@ = undef;
        } elsif ($@ =~ /^Can't locate/) {
            # The load might just have failed because the filename was
+ too
            # long for some old SVR3 systems which treat long names as
+ errors.
            # If we can successfully truncate a long name then it's wo
+rth a go.
            # There is a slight risk that we could pick up the wrong f
+ile here
            # but autosplit should have warned about that when splitti
+ng.
            if ($filename =~ s/(\w{12,})\.al$/substr($1,0,11).".al"/e)
+{
                eval { local $SIG{__DIE__}; require $filename };
            }
        }
        if ($@){
            $@ =~ s/ at .*\n//;
            my $error = $@;
            require Carp;
            Carp::croak($error);
        }
    }
    $@ = $save;
    goto &$sub;
}

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Reading that, one might conclude that object destruction could be an issue with AUTOLOAD blocks, not just dealing with composition ;-)

In reply to Re: Beware of object composition! by shmem
in thread Beware of object composition! by Jenda

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