[PATCH 3/6] lei_xsearch: cleanup {pkt_op_p} on exceptions

[Eric Wong]

We must ensure pkt_op_p doesn't live beyond the scope of
->do_query in the top-level lei-daemon, otherwise it can leave a
stray socket hanging around in case of exceptions.
---
 lib/PublicInbox/LeiXSearch.pm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/PublicInbox/LeiXSearch.pm b/lib/PublicInbox/LeiXSearch.pm
index 45815180..059aa284 100644
--- a/lib/PublicInbox/LeiXSearch.pm
+++ b/lib/PublicInbox/LeiXSearch.pm
@@ -416,6 +416,11 @@ sub ipc_atfork_child {
        $self->SUPER::ipc_atfork_child;
 }
 
+sub delete_pkt_op { # OnDestroy callback
+       my $unclosed_after_die = delete($_[0])->{pkt_op_p} or return;
+       close $unclosed_after_die;
+}
+
 sub do_query {
        my ($self, $lei) = @_;
        my $l2m = $lei->{l2m};
@@ -431,6 +436,7 @@ sub do_query {
                'incr_start_query' => [ \&incr_start_query, $self, $l2m ],
        };
        $lei->{auth}->op_merge($ops, $l2m) if $l2m && $lei->{auth};
+       my $od = PublicInbox::OnDestroy->new($$, \&delete_pkt_op, $lei);
        ($lei->{pkt_op_c}, $lei->{pkt_op_p}) = PublicInbox::PktOp->pair($ops);
        $lei->{1}->autoflush(1);
        $lei->start_pager if delete $lei->{need_pager};
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