I'm write the simple program belowe to test thread.
If I run it inside an IDE (komodo) I got the following output:

THREAD support enabled 
[sub1] thread 18917  params: 0 1 
Attempt to free unreferenced scalar: SV 0x8661170, Perl interpreter: 0
+x86388b8 during global destruction.
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Why I got the warning : Attempt to free unreferenced scalar... inside the IDE ?
BTW: If I tun it from console I didn't get this wrning. Regards, Enzo
Sample code

#!/usr/bin/perl -w
use strict;
use Config;
use threads;

  my( $th, $thres );
  $th = threads->new( \&sub1, 0, 1 );
  $thres = $th->join;
  
# ============
sub sub1
{
     my @params = @_;
     my ( $stmp );
     $stmp = join ' ', @params;
     print "[sub1] thread $$  params: $stmp \n"; 
 }
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Edited by Chady: replaced pre tags with code tags.