regression with REST DSL PUT operations using auto binding?

[Tim Dudgeon]

I think I've hit a regression in 2.17.1 (worked in 2.16.2) with PUT 
operations with REST DSL.

When the input contains a body (and only if it does, and only with PUT) 
the auto binding of the output does not seem to work. Something like:

.put("/some/path").description("Update something")
.bindingMode(RestBindingMode.json).consumes("application/json").produces("application/json")
    .type(Apple.class).outType(Pear.class)
    .route()
    .process((Exchange exch) -> {
        Apple apple = exch.getIn().getBody(Apple.class);
        Pear pear = convert(apple)
        exch.getIn().setBody(pear); // no longer gets converted to json
    })
    .endRest()

If I turn off automatic binding and do it myself its all OK.

Any thoughts?

Tim