I build baloo from 5.69 and always get on executing baloo_file.
baloo_file ASSERT failure in KCatalogPrivate::setupGettextEnv: "You need to instantiate a Q*Application before using KCatalog", file /home/leszek/kde/src/ki18n/src/kcatalog.cpp, line 223 fish: 'baloo_file' terminated by signal SIGABRT
Using translations after QApplications in baloo_file fixes the issue.