open my $fh => $file or die "Failed to open file '$file': $!\n";

##</code><code>##

    open my $fh => $file or die "open: $!\n";

##</code><code>##

    open my $fh => $file or die "open '$file': $!\n";

##</code><code>##

    open my $fh => $file or die "$!\n";

##</code><code>##

    open my $fh => $file or die;