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-rw-r--r--lib/PublicInbox/ExtMsg.pm2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/PublicInbox/ExtMsg.pm b/lib/PublicInbox/ExtMsg.pm
index 243b6bad..77537c2c 100644
--- a/lib/PublicInbox/ExtMsg.pm
+++ b/lib/PublicInbox/ExtMsg.pm
@@ -95,6 +95,8 @@ sub ext_msg {
                 unshift @pfx, { srch => $ctx->{srch}, url => $url };
                 foreach my $pfx (@pfx) {
                         my $srch = delete $pfx->{srch} or next;
+
+                        # FIXME we may need a proper prefix trie here...
                         if (my $res = $srch->mid_prefix($mid)) {
                                 $n_partial += scalar(@$res);
                                 $pfx->{res} = $res;