if( $threads ) {
    require threads::shared; threads::shared->import();
    share @foo; # No parens used
}

##</code><code>##

    use Exception::Spiffy 'catch';
    catch {
        ...
    };

##</code><code>##

    require Exception::Spiffy; Exception::Spiffy->import('catch');
    &catch( sub {
        ...
    } );

##</code><code>##

if( $threads ) {
    require threads::shared; threads::shared->import();
    share( \@foo );
}

##</code><code>##

Type of arg 1 to threads::shared::share must be one of [$@%] (not reference constructor)

##</code><code>##

if( $threads ) {
    require threads::shared; threads::shared->import();
    &share( \@foo ); # The ampersand is important
}