filter/rubylang: fix SQLite DB lifetime problems

Clearly the AltId stuff was never tested for v2.  Ensure
this tricky filter (which reuses Msgmap to avoid introducing
new serial numbers) doesn't trigger deadlocks SQLite due
to opening a DB for writing multiple times.

I went through several iterations of this change before
going with this one, which is the least intrusive I could
fine.

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/PublicInbox/WatchMaildir.pm b/lib/PublicInbox/WatchMaildir.pm
index 84080ba9..2d4c6f43 100644
--- a/lib/PublicInbox/WatchMaildir.pm
+++ b/lib/PublicInbox/WatchMaildir.pm
@@ -121,7 +121,7 @@ sub _remove_spam {
                 eval {
                         my $im = _importer_for($self, $ibx);
                         $im->remove($mime, 'spam');
-                        if (my $scrub = $ibx->filter) {
+                        if (my $scrub = $ibx->filter($im)) {
                                 my $scrubbed = $scrub->scrub($mime, 1);
                                 $scrubbed or return;
                                 $scrubbed == REJECT() and return;
@@ -159,7 +159,8 @@ sub _try_path {
                         my $v = $mime->header_obj->header_raw($wm->[0]);
                         next unless ($v && $v =~ $wm->[1]);
                 }
-                if (my $scrub = $ibx->filter) {
+
+                if (my $scrub = $ibx->filter($im)) {
                         my $ret = $scrub->scrub($mime) or next;
                         $ret == REJECT() and next;
                         $mime = $ret;