error[E0275]: overflow evaluating the requirement `std::boxed::Box>>: NotAuto` --> $DIR/traits-inductive-overflow-lifetime.rs:27:5 | LL | fn is_send() {} | ------- required by this bound in `is_send` ... LL | is_send::>>(); | ^^^^^^^^^^^^^^^^^^^^^^^^ | = note: required because of the requirements on the impl of `NotAuto` for `X>` error: aborting due to previous error For more information about this error, try `rustc --explain E0275`.