In 1.1, the ComplexTypeModelBinderProvider started to check for a default constructer: d09e921. This breaks my application.

I'm using a controller that calls TryUpdateModelAsync with a preconstructed IValueProvider and model instances:

await TryUpdateModelAsync(
    model,
    model.GetType(),
    prefix,
    valueProvider,
    a => true
);

Some of the model types don't have default constructors, most notably because I need some external dependencies for IValidatableObject. These model types now don't work anymore and my entire controller action fails.

The above commit doesn't really contain any information why this change was introduced and the binder itself doesn't require a default contsructor when the model object is pre-constructed