moc: Cannot handle "broken" raw-string

#include <QtCore/QObject>

class Dummy : public QObject
{
        Q_OBJECT

public:
        Dummy()
        {
                const QByteArray data(R"({
                                                                         "    \"example\": true\n"
                                                                         "}\n");
                                                                         })");
        }
};

int main()
{
        Dummy d;
        return 0;
}

$ moc test.cpp
test.cpp:0: Note: No relevant classes found. No output generated.