my $redir = { 0 => fileno($out_r), 1 => fileno($in_w) };
if ($err) {
open(my $fh, '+>', undef) or fail($self, "open.err failed: $!");
my $redir = { 0 => fileno($out_r), 1 => fileno($in_w) };
if ($err) {
open(my $fh, '+>', undef) or fail($self, "open.err failed: $!");