Well. I'm getting the error

Attempt to free unreferenced scalar: SV 0x316cc3c, Perl interpreter: 0
+x240a4bc a
t server.pl line 67.
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in my server code. Never seen this before. What scares me is the Perl interpreter part. Any ideas?

#!/usr/bin/perl -w
 
use strict;
use IO::Socket;
use File::Slurp;
use threads;
use threads::shared;
use XML::LibXML;

my $subscribe:shared = 0;

my $socket=new IO::Socket::INET->new(PeerPort=>12345,Proto=>'udp',Peer
+Addr=>'localhost');
print "This is a test Sending Server\n";

my $capxml = read_file("C:\\Users\\deadpickle\\Desktop\\UAS\\GRRUVI_1.
+60\\test xml\\capabilities.xml");

my $recv = threads->new(\&recvxml);
my $send = threads->new(\&sendxml);

while(1){
}

sub sendxml{
    my $socket=new IO::Socket::INET->new(PeerPort=>12345,Proto=>'udp',
+PeerAddr=>'localhost');
    while (1) {
        #send capabilities every 10 seconds
        $socket->send($capxml);
        print "Sending Capabilities\n";
        sleep 10;
    }
}

sub recvxml{
    my $xml;
    my $kid;
    my $socket=new IO::Socket::INET->new(LocalPort=>56789,Proto=>'udp'
+);
    
    while(1) {
        print "Waiting for message\n";
        $socket->recv($xml,3000);
        print "Recieved Message: $xml\n";
        
        # Parse Message
        my $parser = XML::LibXML->new;
        $parser->recover(1);
        my $doc = $parser->parse_string($xml);
        
        my $element = $doc->getDocumentElement;
        my $elname = $element -> getName();
        if ($elname eq 'StreamSubscribe') {
            my @cap = $element -> childNodes();
            foreach $kid(@cap) {
                $elname = $kid -> getName();
                if ($elname eq 'System') {
                    my @syscap = $element -> childNodes();
                    foreach $kid(@syscap) {
                        $elname = $kid -> getName();
                        if ($elname eq 'Stream') {
                            my $stream = $kid->textContent;
                            $subscribe = 1 if ($stream eq 'Telemetry')
+;
                            $subscribe = 2 if ($stream eq 'Flight Plan
+');
                        }
                    }
                }
            }
        }
        print "Subscribed to Telemetry\n" if $subscribe == 1;
        print "Subscribed to Flight Plan\n" if $subscribe == 2;
    }
}
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