searchidx: fallback to lookup on pre-set article numbers

Yet another hiccup from reusing pre-set article numbers on
various ruby-lang.org mailing lists.  This was causing messages
to not appear to NNTP readers which use XOVER.

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index 69b7a6f6964bef876cfb5e41a62d02764b678b19..0824db03c113a5d001b846b3f4c115ae1a3d7de2 100644 (file)
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -478,7 +478,12 @@ sub unindex_blob {
 
 sub index_mm {
        my ($self, $mime) = @_;
-       $self->{mm}->mid_insert(mid_clean(mid_mime($mime)));
+       my $mid = mid_clean(mid_mime($mime));
+       my $mm = $self->{mm};
+       my $num = $mm->mid_insert($mid);
+
+       # fallback to num_for since filters like RubyLang set the number
+       defined $num ? $num : $mm->num_for($mid);
 }
 
 sub unindex_mm {