#$Q_found->enqueue( $cmd ) ; # using this in place of async works

##</code><code>##

c:\test>junk9
Create terminal watcher...
Awaiting commands...
fred
fred
bill
bill
john
john
quit
Resolving open threads

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;
use threads;
use Thread::Queue;

# Create terminal watcher
print "Create terminal watcher...\n";
my $Q_stdin = Thread::Queue->new;
async {
        $Q_stdin->enqueue( $_ ) while defined( $_ = <STDIN> );
    }->detach;
my $Q_found = Thread::Queue->new;

my $cmd;
print "Awaiting commands...\n";
MAIN_LOOP: while (not defined $cmd or $cmd !~ /^q/i) {
    sleep(1); # Reduce load
    # Process commands
    $cmd = $Q_stdin->dequeue_nb;
    if (defined $cmd) {
        chomp $cmd;
        if ($cmd =~ /^q/i) {
            print "Resolving open threads\n";
        } else {
            async {
                    $Q_found->enqueue( $cmd ) ;
                }->detach;
            #$Q_found->enqueue( $cmd ) ; # using this in place of async works
        }
    }
    # Print announcements
    while (defined(my $output = $Q_found->dequeue_nb)) {
        print ">$output\n";
    }
}

__END__
c:\test>junk9
Create terminal watcher...
Awaiting commands...
fred
bill
john
>fred
mary
>bill
quit
>john
Resolving open threads
>mary

##</code><code>##

c:\test>perl -wle" printf qq[%08d\n], $_ for 1 .. 10; print 'quit' " | perl junk9.pl
Create terminal watcher...
Awaiting commands...
>00000001
>00000002
>00000003
>00000004
>00000005
>00000006
>00000007
>00000008
>00000009
Resolving open threads
>00000010