Q_PROPERTY silently ignored on forward declared types

If a Q_PROPERTY is used with a forward declared type, MOC does not generate code for it. There is no warnings/errors during compilation.

Example:

    class Foo;
    Q_PROPERTY(Foo* foo READ GetFoo NOTIFY FooChanged);

This is a problem when refactoring large code bases, as forward declaring types in some file may introduce bugs that are not detected.

I would expect MOC to fail when generating code for a forward declared type.