[Koha] Zebra reindexing issue

[David Liddle]

Hello all! After enabling search for non-Roman scripts in our instances, as
detailed at https://wiki.koha-community.org/wiki/ICU_chains_configuration,
I needed to rebuild the index. Our production and test systems run Koha
22.05.10 on Debian 11. As the process was running, the following message
was displayed 6 times:

"Use of uninitialized value $sub6 in pattern match (m//) at
/usr/share/koha/lib/Koha/Filter/MARC/Index880InZebra.pm line 77."

- What does this indicate? (I mean, beyond the obvious.)
- Is it something that we should track down and correct?
- How can we identify the bibliographic records that trigger the notice?
There are no log entries that I can find with details about the records
causing the message.

Thank you in advance for your attention and help!

David Liddle
IT Manager
david.liddle at wycliff.de (just not for this list)

Wycliff e.V., https://wycliff.de
Seminar für Sprache und Kultur, https://spracheundkultur.org
Internationales Tagungszentrum Karimu, https://karimu.de