Looking in logstash for channel:T76305 to find these hits.
Warning: Title::newFromTitle: $text must be a string
from
PrefixSearch->searchWithVariants/PrefixSearch->search/PrefixSearch->searchBackend/PrefixSearch->defaultSearchBackend/Title::newFromText
Note that Title::newFromText already throws for objects and tolerates null. So this must be a primitive non-null, non-string value being passed somehow.