1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
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warning: this function depends on never type fallback being `()`
--> $DIR/diverging-fallback-no-leak.rs:14:1
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LL | fn main() {
| ^^^^^^^^^
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= 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 `!: Test` will fail
--> $DIR/diverging-fallback-no-leak.rs:20:23
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LL | unconstrained_arg(return);
| ^^^^^^
= note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
help: use `()` annotations to avoid fallback changes
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LL | unconstrained_arg::<()>(return);
| ++++++
warning: 1 warning emitted
|