STEPS TO REPRODUCE 1. disable all plugins but libzipplugin, restart ark 2. download https://download.qt.io/official_releases/qt/5.15/5.15.0/submodules/qtbase-everywhere-src-5.15.0.zip 3. open it in ark and try Menu > Test Archive multiple times. Lets say this https://invent.kde.org/utilities/ark/-/merge_requests/4 got merged and even then testArchive leaks. Like this: open test archive: 58mb memory usage, first test call: 66, second: 76, fourth: 88, all next calls doesn't increase. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon (available in About System) KDE Plasma Version: 5.19.4 KDE Frameworks Version: 5.72.0 Qt Version: 5.14.2 ADDITIONAL INFORMATION