error: changes to closure capture in Rust 2021 will affect drop order
  --> $DIR/issue-90465.rs:17:14
   |
LL |     let c0 = move || {
   |              ^^^^^^^
...
LL |         let _ = f0;
   |                 -- in Rust 2018, this causes the closure to capture `f0`, but in Rust 2021, it has no effect
...
LL | }
   | - in Rust 2018, `f0` is dropped here along with the closure, but in Rust 2021 `f0` is not part of the closure
   |
   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/disjoint-capture-in-closures.html>
note: the lint level is defined here
  --> $DIR/issue-90465.rs:3:9
   |
LL | #![deny(rust_2021_incompatible_closure_captures)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: add a dummy let to cause `f0` to be fully captured
   |
LL ~     let c0 = move || {
LL +         let _ = &f0;
   |

error: aborting due to 1 previous error