invalidContainerLoop
ftp://ftp.de.debian.org/debian/pool/main/u/ukui-volume-control/ukui-volume-control_4.20.0.2.orig.tar.xz
2.21.0 ukui-volume-control-4.20.0.2/backend/AudioMethod.cpp:886:20: error: Calling '+=' while iterating the container is invalid. [invalidContainerLoop]