error[E0597]: `a` does not live long enough --> $DIR/issue-55511.rs:13:28 | LL | let a = 22; | - binding `a` declared here LL | let b = Some(Cell::new(&a)); | ^^ borrowed value does not live long enough ... LL | <() as Foo<'static>>::C => { } | ----------------------- type annotation requires that `a` is borrowed for `'static` ... LL | } | - `a` dropped here while still borrowed error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0597`.