error[E0275]: overflow evaluating the requirement `Bar<Bar<Bar<Bar<Bar<Bar<Bar<...>>>>>>>: Foo` --> $DIR/E0275.rs:6:33 | LL | impl<T> Foo for T where Bar<T>: Foo {} | ^^^ | = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`E0275`) note: required for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<...>>>>>>>>>>>>>>>>>>>>>` to implement `Foo` --> $DIR/E0275.rs:6:9 | LL | impl<T> Foo for T where Bar<T>: Foo {} | ^^^ ^ --- unsatisfied trait bound introduced here = note: the full type name has been written to '$TEST_BUILD_DIR/error-codes/E0275/E0275.long-type-hash.txt' = note: 126 redundant requirements hidden = note: required for `Bar<T>` to implement `Foo` error: aborting due to previous error For more information about this error, try `rustc --explain E0275`.