error[E0309]: the parameter type `A` may not live long enough --> $DIR/regions-infer-bound-from-trait.rs:33:5 | LL | fn bar1<'a,A>(x: Inv<'a>, a: A) { | -- the parameter type `A` must be valid for the lifetime `'a` as defined here... LL | check_bound(x, a) | ^^^^^^^^^^^^^^^^^ ...so that the type `A` will meet its required lifetime bounds | help: consider adding an explicit lifetime bound | LL | fn bar1<'a,A: 'a>(x: Inv<'a>, a: A) { | ++++ error[E0309]: the parameter type `A` may not live long enough --> $DIR/regions-infer-bound-from-trait.rs:37:5 | LL | fn bar2<'a,'b,A:Is<'b>>(x: Inv<'a>, y: Inv<'b>, a: A) { | -- the parameter type `A` must be valid for the lifetime `'a` as defined here... LL | check_bound(x, a) | ^^^^^^^^^^^^^^^^^ ...so that the type `A` will meet its required lifetime bounds | help: consider adding an explicit lifetime bound | LL | fn bar2<'a,'b,A:Is<'b> + 'a>(x: Inv<'a>, y: Inv<'b>, a: A) { | ++++ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0309`.