error[E0277]: the trait bound `for<'tcx> F: Foo<'tcx>` is not satisfied --> $DIR/hrtb-higher-ranker-supertraits.rs:18:26 | LL | want_foo_for_any_tcx(f); | ^ the trait `for<'tcx> Foo<'tcx>` is not implemented for `F` ... LL | fn want_foo_for_any_tcx(f: &F) | -------------------- required by a bound in this LL | where F : for<'tcx> Foo<'tcx> | ------------------- required by this bound in `want_foo_for_any_tcx` | help: consider further restricting this bound | LL | where F : Foo<'x> + for<'tcx> Foo<'tcx> | ^^^^^^^^^^^^^^^^^^^^^ error[E0277]: the trait bound `for<'ccx> B: Bar<'ccx>` is not satisfied --> $DIR/hrtb-higher-ranker-supertraits.rs:35:26 | LL | want_bar_for_any_ccx(b); | ^ the trait `for<'ccx> Bar<'ccx>` is not implemented for `B` ... LL | fn want_bar_for_any_ccx(b: &B) | -------------------- required by a bound in this LL | where B : for<'ccx> Bar<'ccx> | ------------------- required by this bound in `want_bar_for_any_ccx` | help: consider further restricting this bound | LL | where B : Bar<'x> + for<'ccx> Bar<'ccx> | ^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`.