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-rw-r--r--lib/PublicInbox/LeiToMail.pm1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/PublicInbox/LeiToMail.pm b/lib/PublicInbox/LeiToMail.pm
index 5a6f18fb..1f815e40 100644
--- a/lib/PublicInbox/LeiToMail.pm
+++ b/lib/PublicInbox/LeiToMail.pm
@@ -472,6 +472,7 @@ sub ipc_atfork_child {
                 close $zpipe->[0];
         }
         $self->{wcb} = $self->write_cb($lei);
+        $SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
         $self->SUPER::ipc_atfork_child;
 }