lei_to_mail: don't close STDOUT unless it is a mbox* output

We only care about error checking when stdout is an mbox output
pointed to a pathname.  This is noticeable with `lei up' with
multiple non-mbox* destinations.  We'll also ensure throwing
exceptions to trigger lei->x_it from lei->do_env results in the
epoll/kqueue watch being discarded, otherwise commands may never
terminate (leading to stuck tests)

1 files changed, 2 insertions, 0 deletions

diff --git a/t/lei-q-save.t b/t/lei-q-save.t
index a9f9d4d6..0970bc3c 100644
--- a/t/lei-q-save.t
+++ b/t/lei-q-save.t
@@ -305,5 +305,7 @@ EOM
         is(scalar(@new), 2, 'got new message');
         is_xdeeply([grep { $_ eq $orig[0] } @new], \@orig,
                 'original message preserved on up w/ threads');
+        lei_ok 'up', "$home/md", $d, \'multiple maildir up';
+        unlike $lei_err, qr! line \d+!s, 'no warnings';
 });
 done_testing;