1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
warning: this function depends on never type fallback being `()`
--> $DIR/fallback-closure-ret.rs:21:1
|
LL | fn main() {
| ^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/never-type-fallback.html>
= help: specify the types explicitly
note: in edition 2024, the requirement `!: Bar` will fail
--> $DIR/fallback-closure-ret.rs:24:5
|
LL | foo(|| panic!());
| ^^^^^^^^^^^^^^^^
= note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
help: use `()` annotations to avoid fallback changes
|
LL | foo::<()>(|| panic!());
| ++++++
warning: 1 warning emitted
|
