1 files changed, 4 insertions, 1 deletions
diff --git a/lib/PublicInbox/DS.pm b/lib/PublicInbox/DS.pm
index 4947192f..08f4e9e8 100644
--- a/lib/PublicInbox/DS.pm
+++ b/lib/PublicInbox/DS.pm
@@ -505,7 +505,10 @@ sub write {
              return $self->close;
          }
          my $tmpio = tmpio($self, $bref, $written) or return 0;
-        $self->{wbuf} = [ $tmpio ];
+
+        # wbuf may be an empty array if we're being called inside
+        # ->flush_write via CODE bref:
+        push @{$self->{wbuf} ||= []}, $tmpio;
          watch($self, EPOLLOUT|EPOLLONESHOT);
          return 0;
      }