Q_INVOKABLES with default parameters don't work when accessed from a workerscript thread.

The list model worker agent implementation has the following method:

Q_INVOKABLE void remove(int index);

If this is changed to:

Q_INVOKABLE void remove(int index, int count=1);

Then you call the following from a worker script:

model.remove(0, 10);

The count value is ignored and 1 is always passed through to the C++ method.

In QDeclarativePropertyCache::property() the declarative engine pointer is null when called from a worker script, and the fall through code that creates the property just looks at the name of the method being called, so it doesn't appear to support overloaded methods.