PHP Notice: Undefined offset: 118
- The wiki in question may be suffering from various namespace-related corruptions. The Siteinfo API error is presumably just the most accessible way to trigger it.
- The information provided to API consumers is presumably invalid or not correctly usable.
- Logspam noise. If triggered at the "wrong" times, could abort deployments and/or cause SRE alerts.
This is the third time in less than a year that this particular kind of PHP error was caused after a deployment.