-# Copyright (C) 2020 all contributors <meta@public-inbox.org>
+# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
package PublicInbox::OnDestroy;
sub DESTROY {
my ($cb, @args) = @{$_[0]};
- if (!ref($cb)) {
+ if (!ref($cb) && $cb) {
my $pid = $cb;
return if $pid != $$;
$cb = shift @args;