my $spamtest = SpamAssassin::Mail::SpamAssassin->new(...) : shared;

##</code><code>##

use threads; 
use threads::shared; 
use Benchmark::Timer;

$T = Benchmark::Timer->new() : shared;

Unquoted string "shared" may clash with future reserved word at (eval 3) line 1, <> line 2.
syntax error at (eval 3) line 1, near ") :"

##</code><code>##

use threads; 
use threads::shared; 
use Benchmark::Timer;
{ 
    my $T : shared; 
    $T = Benchmark::Timer->new();
}
Invalid value for shared scalar at (eval 5) line 1, <> line 5.