Gentoo's Bugzilla –
Attachment 598908 Details for
Bug 702292app-emulation/virtualbox-5.2.32 - In file included from .../work/VirtualBox-5.2.32/src/VBox/Frontends/VirtualBox/src/VBoxGLSupportInfo.cpp:26: /usr/include/qt5/QtCore/qlist.h:423:61: error: stray ‘\3’ in program