Thanks to Markus Rathgeb for reporting the bug and providing the fix.
Closes: https://bugs.gentoo.org/655844
Package-Manager: Portage-2.3.36, Repoman-2.3.9
--- /dev/null
+--- a/src/gui/entry/EditEntryWidget.cpp
++++ b/src/gui/entry/EditEntryWidget.cpp
+@@ -32,6 +32,7 @@
+ #include <QMimeData>
+ #include <QEvent>
+ #include <QColorDialog>
++#include <QButtonGroup>
+
+ #include "autotype/AutoType.h"
+ #include "core/Config.h"
dev-qt/qtconcurrent:5
"
+PATCHES=(
+ "${FILESDIR}/${P}-qt-5.11-edit-entry-widget-includes.patch" #655844
+)
+
src_prepare() {
use test || \
sed -e "/^find_package(Qt5Test/d" -i CMakeLists.txt || die