imap: avoid warnings on non-slice mailboxes

[public-inbox.git] / lib / PublicInbox / IMAP.pm

diff --git a/lib/PublicInbox/IMAP.pm b/lib/PublicInbox/IMAP.pm
index d8c898f4b511e1f93bfdcfeac59cc5c7e87a99f0..8ab4b1e7dba9e86853e7d93af5bc6c7627f0221e 100644 (file)
--- a/lib/PublicInbox/IMAP.pm
+++ b/lib/PublicInbox/IMAP.pm
@@ -246,6 +246,7 @@ sub uo2m_extend ($$;$) {
        my $base = $self->{uid_base};
        ++$beg;
        my $uids = $self->{ibx}->over->uid_range($beg, $base + UID_SLICE);
+       return $uo2m if !scalar(@$uids);
        my @tmp; # [$UID_OFFSET] => $MSN
        my $write_method = $_[2] // 'msg_more';
        if (ref($uo2m)) {