[PATCH] overidx: each_by_mid: account for messages being deleted

[Eric Wong]

This may fix some extindex problems and should get rid of
the "Can't bless non-reference value" errors.
---
 lib/PublicInbox/OverIdx.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/OverIdx.pm b/lib/PublicInbox/OverIdx.pm
index 0c8a4d9ee3f8..985abbf4e693 100644
--- a/lib/PublicInbox/OverIdx.pm
+++ b/lib/PublicInbox/OverIdx.pm
@@ -158,7 +158,8 @@ SELECT $cols FROM over WHERE over.num = ? LIMIT 1
 
                foreach (@$nums) {
                        $sth->execute($_->[0]);
-                       my $smsg = $sth->fetchrow_hashref;
+                       # $cb may delete rows and invalidate nums
+                       my $smsg = $sth->fetchrow_hashref // next;
                        $smsg = PublicInbox::Over::load_from_row($smsg);
                        $cb->($self, $smsg, @arg) or return;
                }
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