[PATCH 03/10] lei_to_mail: drop cyclic reference if not using IPC

[Eric Wong <e@80x24.org>]

This may fix another interrupt-related segfault I'm occasionally
seeing (but so far unable to reproduce).
---
 lib/PublicInbox/LeiToMail.pm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/PublicInbox/LeiToMail.pm b/lib/PublicInbox/LeiToMail.pm
index 43c59da0..438fb175 100644
--- a/lib/PublicInbox/LeiToMail.pm
+++ b/lib/PublicInbox/LeiToMail.pm
@@ -483,11 +483,14 @@ sub ipc_atfork_prepare {
 # ordering is unstable at worker exit and may cause segfaults
 sub reap_gits {
 	my ($self) = @_;
+	delete $self->{wcb};
 	for my $git (delete @$self{grep(/\A$$\0/, keys %$self)}) {
 		$git->async_wait_all;
 	}
 }
 
+sub DESTROY { delete $_[0]->{wcb} }
+
 sub ipc_atfork_child { # runs after IPC::wq_worker_loop
 	my ($self) = @_;
 	$self->SUPER::ipc_atfork_child;