error: the `function` method cannot be invoked on `&dyn MutTrait`
  --> $DIR/mutability-mismatch.rs:26:33
   |
LL |     (&MutType as &dyn MutTrait).function();
   |                                 ^^^^^^^^
   |
   = help: you need `&mut dyn MutTrait` instead of `&dyn MutTrait`

error: the `function` method cannot be invoked on `&mut dyn Trait`
  --> $DIR/mutability-mismatch.rs:29:35
   |
LL |     (&mut Type as &mut dyn Trait).function();
   |                                   ^^^^^^^^
   |
   = help: you need `&dyn Trait` instead of `&mut dyn Trait`

error: aborting due to 2 previous errors