got_it> line1
got_it> line2
got_it> line3
123
456

##</code><code>##

got_it> 123
got_it> 456

##</code><code>##

999
got_it> 777
got_it> 888
123
456

##</code><code>##

999
got_it> 777
got_it> 888
123
456

##</code><code>##

use strict;
use warnings;

use Socket;

# UPDATE #2: added 2 lines below
use Win32::Process;
use Win32;

my $bug_on = 1;

sub _pipe_from_fork ($) {
    my $pid;

    # emulate pipe()
    my $WRITE;
    socketpair($_[0], $WRITE, AF_UNIX, SOCK_STREAM, PF_UNSPEC)
        and shutdown($_[0], 1)
        and shutdown($WRITE, 0)
        or return undef;

    if (defined($pid = fork()))
    {
        unless ($pid)
        {
            if ($bug_on)
            {
                # UPDATE #1: added 1 line below
                close(STDOUT);

                # XXX: BUG
                open(STDOUT, ">&", $WRITE) or die;
            }
            else
            {
                print $WRITE "$_\n" for qw(line1 line2 line3);
            }
        }
    }

    return $pid;
}

my $pid = _pipe_from_fork(my $READ);
die unless defined($pid);

if ($pid)
{
    print "got_it> $_" while <$READ>;
}
else
{
    # UPDATE #1: added 1 line below
    print `perl -le "print 777; print 888; print STDERR 999"`;

    # UPDATE #2: commented exec line and added Win32::Process::Create()
    #exec qw(perl -le), 'print 123; print 456' or die;

    Win32::Process::Create(
        my $obj,
        'C:\\Perl\\bin\\perl.exe',
        'C:\\Perl\\bin\\perl.exe -le "print 123; print 456"',

        # does not inherit filehandles?
        1,

        NORMAL_PRIORITY_CLASS,
        "."
    );

}