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Regression test for "unstable" traits in force-unstable builds

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Zalathar 2026-02-16 17:13:47 +11:00
parent 139651428d
commit 0f5c2215ad
4 changed files with 115 additions and 0 deletions
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7
tests/ui/traits/auxiliary/force_unstable.rs Normal file
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//@ edition: 2024
//@ compile-flags: -Zforce-unstable-if-unmarked
// Auxiliary crate that uses `-Zforce-unstable-if-unmarked` to export an
// "unstable" trait.
pub trait ForeignTrait {}

36
tests/ui/traits/nightly-only-unstable.force.stderr Normal file
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error[E0277]: the trait bound `(): LocalTrait` is not satisfied
--> $DIR/nightly-only-unstable.rs:25:21
|
LL | use_local_trait(());
| --------------- ^^ the nightly-only, unstable trait `LocalTrait` is not implemented for `()`
| |
| required by a bound introduced by this call
|
help: this trait has no implementations, consider adding one
--> $DIR/nightly-only-unstable.rs:14:1
|
LL | trait LocalTrait {}
| ^^^^^^^^^^^^^^^^
note: required by a bound in `use_local_trait`
--> $DIR/nightly-only-unstable.rs:16:28
|
LL | fn use_local_trait(_: impl LocalTrait) {}
| ^^^^^^^^^^ required by this bound in `use_local_trait`
error[E0277]: the trait bound `(): ForeignTrait` is not satisfied
--> $DIR/nightly-only-unstable.rs:31:23
|
LL | use_foreign_trait(());
| ----------------- ^^ the nightly-only, unstable trait `ForeignTrait` is not implemented for `()`
| |
| required by a bound introduced by this call
|
note: required by a bound in `use_foreign_trait`
--> $DIR/nightly-only-unstable.rs:20:30
|
LL | fn use_foreign_trait(_: impl force_unstable::ForeignTrait) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `use_foreign_trait`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.

36
tests/ui/traits/nightly-only-unstable.normal.stderr Normal file
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error[E0277]: the trait bound `(): LocalTrait` is not satisfied
--> $DIR/nightly-only-unstable.rs:25:21
|
LL | use_local_trait(());
| --------------- ^^ the trait `LocalTrait` is not implemented for `()`
| |
| required by a bound introduced by this call
|
help: this trait has no implementations, consider adding one
--> $DIR/nightly-only-unstable.rs:14:1
|
LL | trait LocalTrait {}
| ^^^^^^^^^^^^^^^^
note: required by a bound in `use_local_trait`
--> $DIR/nightly-only-unstable.rs:16:28
|
LL | fn use_local_trait(_: impl LocalTrait) {}
| ^^^^^^^^^^ required by this bound in `use_local_trait`
error[E0277]: the trait bound `(): ForeignTrait` is not satisfied
--> $DIR/nightly-only-unstable.rs:31:23
|
LL | use_foreign_trait(());
| ----------------- ^^ the nightly-only, unstable trait `ForeignTrait` is not implemented for `()`
| |
| required by a bound introduced by this call
|
note: required by a bound in `use_foreign_trait`
--> $DIR/nightly-only-unstable.rs:20:30
|
LL | fn use_foreign_trait(_: impl force_unstable::ForeignTrait) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `use_foreign_trait`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.

36
tests/ui/traits/nightly-only-unstable.rs Normal file
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//@ revisions: normal force
//@ edition: 2024
//@ aux-crate: force_unstable=force_unstable.rs
//@[force] compile-flags: -Zforce-unstable-if-unmarked
#![feature(rustc_private)]
// Regression test for <https://github.com/rust-lang/rust/issues/152692>.
//
// When building a crate with `-Zforce-unstable-if-unmarked` (e.g. the compiler or stdlib),
// it's unhelpful to mention that a not-implemented trait is unstable, because that will
// be true of every local and foreign trait that isn't explicitly marked stable.
trait LocalTrait {}
fn use_local_trait(_: impl LocalTrait) {}
//~^ NOTE required by a bound in `use_local_trait`
//~| NOTE required by this bound in `use_local_trait`
fn use_foreign_trait(_: impl force_unstable::ForeignTrait) {}
//~^ NOTE required by a bound in `use_foreign_trait`
//~| NOTE required by this bound in `use_foreign_trait`
fn main() {
use_local_trait(());
//~^ ERROR the trait bound `(): LocalTrait` is not satisfied
//[normal]~| NOTE the trait `LocalTrait` is not implemented for `()`
//[force]~| NOTE the nightly-only, unstable trait `LocalTrait` is not implemented for `()`
//~| NOTE required by a bound introduced by this call
use_foreign_trait(());
//~^ ERROR the trait bound `(): ForeignTrait` is not satisfied
//[normal]~| NOTE the nightly-only, unstable trait `ForeignTrait` is not implemented for `()`
//[force]~| NOTE the nightly-only, unstable trait `ForeignTrait` is not implemented for `()`
//~| NOTE required by a bound introduced by this call
}