Never mind. It should be possible to support

Turns out we would need a new API to support this scenario (representing the with expression with a Call as the receiver of a MemberInit) so we should block for now. Re-opening the PR.

We can't do MemberInit(Call(...), Initializers) because MemberInit only works with a New at the moment.

We would need an API like public static System.Linq.Expressions.MemberInitExpression MemberInit (System.Linq.Expressions.MethodCallExpression receiver, System.Collections.Generic.IEnumerable<System.Linq.Expressions.MemberBinding> bindings); or some variant.

For later reference, here's the WIP on enabling.