error: lifetime may not live long enough --> $DIR/regions-variance-invariant-use-covariant.rs:17:12 | LL | fn use_<'b>(c: Invariant<'b>) { | -- lifetime `'b` defined here ... LL | let _: Invariant<'static> = c; | ^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'static` | = note: requirement occurs because of the type `Invariant<'_>`, which makes the generic argument `'_` invariant = note: the struct `Invariant<'a>` is invariant over the parameter `'a` = help: see for more information about variance error: aborting due to 1 previous error