error[E0275]: overflow evaluating the requirement `W<_>: Trait` --> $DIR/exponential-trait-goals.rs:17:13 | LL | impls::>(); | ^^^^ | = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`exponential_trait_goals`) note: required by a bound in `impls` --> $DIR/exponential-trait-goals.rs:14:13 | LL | fn impls() {} | ^^^^^ required by this bound in `impls` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0275`.