error[E0597]: `foo` does not live long enough --> $DIR/issue-90600-expected-return-static-indirect.rs:7:32 | LL | fn inner(mut foo: &[u8]) { | ------- binding `foo` declared here LL | let refcell = RefCell::new(&mut foo); | ^^^^^^^^ borrowed value does not live long enough LL | LL | let read = &refcell as &RefCell; | -------- cast requires that `foo` is borrowed for `'static` ... LL | } | - `foo` dropped here while still borrowed error: lifetime may not live long enough --> $DIR/issue-90600-expected-return-static-indirect.rs:9:16 | LL | fn inner(mut foo: &[u8]) { | - let's call the lifetime of this reference `'1` ... LL | let read = &refcell as &RefCell; | ^^^^^^^^ cast requires that `'1` must outlive `'static` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0597`.