Bug in qqmlimport when loading qml plugins with initializeEngine

In QQmlImportDatabase::importPlugin when passing the uri to
ep->typeLoader.initializeEngine(eiface, moduleId);
it uses
const char *moduleId = uri.toUtf8().constData();

to convert to a utf8 char*. This does not work, as the underlying QByteArray is destroyed as soon as the function call is done.