When repeating calling the function, the krunner process's memory consumption keeps getting larger and larger. The leak is gone when commenting out the function.

Heaptrack result: heaptrack.tar.gz

Information for package libAppStreamQt2:

Repository : unstable-kde-frameworks
Name : libAppStreamQt2
Version : 0.15.1-ku.84.1
Arch : x86_64
Vendor : obs://build.opensuse.org/KDE:Unstable
Installed Size : 274.1 KiB
Installed : Yes
Status : up-to-date
Source package : AppStream-0.15.1-ku.84.1.src
Upstream URL : https://www.freedesktop.org/software/appstream/docs/
Summary : Qt5 bindings for AppStream