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<dyn Read>;
   |                -------- 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<dyn Read>;
   |                ^^^^^^^^ cast requires that `'1` must outlive `'static`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0597`.