inbox: name variable for values loop iterator

->on_inbox_unlock callbacks could clobber $_, and this seems to
fix a problem with -extindex --watch failing to index some
inboxes after SIGHUP reload.

(cherry picked from commit b5e960f50289434025f5904c8c1311e4c8a02b82)

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/PublicInbox/Inbox.pm b/lib/PublicInbox/Inbox.pm
index b0894a7d..e9efd29d 100644
--- a/lib/PublicInbox/Inbox.pm
+++ b/lib/PublicInbox/Inbox.pm
@@ -422,8 +422,8 @@ sub on_unlock {
         my ($self) = @_;
         check_inodes($self);
         my $subs = $self->{unlock_subs} or return;
-        for (values %$subs) {
-                eval { $_->on_inbox_unlock($self) };
+        for my $obj (values %$subs) {
+                eval { $obj->on_inbox_unlock($self) };
                 warn "E: $@ ($self->{inboxdir})\n" if $@;
         }
 }