1 files changed, 7 insertions, 2 deletions
diff --git a/lib/PublicInbox/SearchThread.pm b/lib/PublicInbox/SearchThread.pm
index 00ae9fac..672c53ad 100644
--- a/lib/PublicInbox/SearchThread.pm
+++ b/lib/PublicInbox/SearchThread.pm
@@ -33,19 +33,24 @@ sub thread {
          # can be shakier if somebody used In-Reply-To with multiple, disparate
          # messages.  So, take the client Date: into account since we can't
          # always determine ordering when somebody uses multiple In-Reply-To.
+        my (%dedupe, $mid);
          my @kids = sort { $a->{ds} <=> $b->{ds} } grep {
                  # this delete saves around 4K across 1K messages
                  # TODO: move this to a more appropriate place, breaks tests
                  # if we do it during psgi_cull
                  delete $_->{num};
                  bless $_, 'PublicInbox::SearchThread::Msg';
-                if (exists $id_table{$_->{mid}}) {
+                $mid = $_->{mid};
+                if (exists $id_table{$mid}) {
                          $_->{children} = [];
                          push @imposters, $_; # we'll deal with them later
                          undef;
                  } else {
                          $_->{children} = {}; # will become arrayref later
-                        $id_table{$_->{mid}} = $_;
+                        %dedupe = ($mid => undef);
+                        ($mid) = keys %dedupe;
+                        $_->{mid} = $mid;
+                        $id_table{$mid} = $_;
                          defined($_->{references});
                  }
          } @$msgs;