Werk #19859: printer_supply: skip nameless supplies during discovery

Component	Checks & agents
Title	printer_supply: skip nameless supplies during discovery
Date	Apr 23, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p34 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Service discovery for the printer_supply check crashed with TypeError: 'item' must be a non empty string or ommited entirely, got '' when a printer reported a supply entry without a name.

Nameless supplies are now skipped instead of aborting discovery for the whole device.

To the list of all Werks