error[E0275]: overflow evaluating the requirement `(): Trait` --> $DIR/double-cycle-inductive-coinductive.rs:32:19 | LL | impls_trait::<()>(); | ^^ | = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`double_cycle_inductive_coinductive`) note: required by a bound in `impls_trait` --> $DIR/double-cycle-inductive-coinductive.rs:17:19 | LL | fn impls_trait() {} | ^^^^^ required by this bound in `impls_trait` error[E0275]: overflow evaluating the requirement `(): TraitRev` --> $DIR/double-cycle-inductive-coinductive.rs:35:23 | LL | impls_trait_rev::<()>(); | ^^ | = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`double_cycle_inductive_coinductive`) note: required by a bound in `impls_trait_rev` --> $DIR/double-cycle-inductive-coinductive.rs:29:23 | LL | fn impls_trait_rev() {} | ^^^^^^^^ required by this bound in `impls_trait_rev` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0275`.