You can open up KDE System Montor; Enable the Virtual Memory; and see the problem under the Baloo indexer. This error carries over into a various of applications usually that are around the baloo registry.
Disabling Baloo at launch fixes the issue; however registry syntax; timing could possibly correct the error.
Dolphin virtual memory expands after you do 50+ more searches as history seems to collapse the data tables. More frequent when Baloo is in use.
I traced the error far into the qlite and can't parse into the manifest because the encryptions.