When qmlplugindump is used on a module that has a singleton referenced in the qmldir, it will mark some types as -1 for the version

When qmlplugindump is used on a module that has a singleton referenced in the qmldir, it will mark some types as -1 for the version. If the singleton is not used then this works fine.

To reproduce with the example do:

qmake && make && make install
qmlplugindump Test.Styles 1.2

and the output will include:

Component {
        prototype: "QObject"
        name: "ColorStyle -1.-1"
        exports: ["ColorStyle -1.-1"]
        exportMetaObjectRevisions: [-1]
        isComposite: true
    }