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matthiaskrgrmatthiaskrgr
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Rollup merge of rust-lang#129600 - traviscross:TC/tie-impl_trait_overcaptures-to-rust-2024, r=compiler-errors
Tie `impl_trait_overcaptures` lint to Rust 2024 The `impl_trait_overcaptures` lint is part of the migration to Rust 2024 and the Lifetime Capture Rules 2024. Now that we've stabilized precise capturing (RFC 3617), let's tie this lint to the `rust_2024_compatibility` lint group. Tracking: - rust-lang#117587 r? `@compiler-errors`
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‎compiler/rustc_lint/src/impl_trait_overcaptures.rs

Lines changed: 6 additions & 4 deletions
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@@ -10,7 +10,9 @@ use rustc_middle::middle::resolve_bound_vars::ResolvedArg;
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use rustc_middle::ty::{
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self, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor,
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};
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use rustc_session::lint::FutureIncompatibilityReason;
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use rustc_session::{declare_lint, declare_lint_pass};
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use rustc_span::edition::Edition;
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use rustc_span::Span;
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use crate::{fluent_generated as fluent, LateContext, LateLintPass};
@@ -54,10 +56,10 @@ declare_lint! {
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pub IMPL_TRAIT_OVERCAPTURES,
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Allow,
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"`impl Trait` will capture more lifetimes than possibly intended in edition 2024",
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//@future_incompatible = FutureIncompatibleInfo {
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// reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2024),
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// reference: "<FIXME>",
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//};
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@future_incompatible = FutureIncompatibleInfo {
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reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2024),
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reference: "<https://doc.rust-lang.org/nightly/edition-guide/rust-2024/rpit-lifetime-capture.html>",
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};
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}
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declare_lint! {

‎tests/ui/impl-trait/precise-capturing/overcaptures-2024.fixed

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@@ -5,14 +5,17 @@
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fn named<'a>(x: &'a i32) -> impl Sized + use<> { *x }
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//~^ ERROR `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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fn implicit(x: &i32) -> impl Sized + use<> { *x }
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//~^ ERROR `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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struct W;
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impl W {
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fn hello(&self, x: &i32) -> impl Sized + '_ + use<'_> { self }
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//~^ ERROR `impl Sized + '_` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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}
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trait Higher<'a> {
@@ -24,5 +27,6 @@ impl Higher<'_> for () {
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fn hrtb() -> impl for<'a> Higher<'a, Output = impl Sized + use<>> {}
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//~^ ERROR `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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fn main() {}

‎tests/ui/impl-trait/precise-capturing/overcaptures-2024.rs

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Original file line numberDiff line numberDiff line change
@@ -5,14 +5,17 @@
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fn named<'a>(x: &'a i32) -> impl Sized { *x }
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//~^ ERROR `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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fn implicit(x: &i32) -> impl Sized { *x }
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//~^ ERROR `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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struct W;
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impl W {
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fn hello(&self, x: &i32) -> impl Sized + '_ { self }
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//~^ ERROR `impl Sized + '_` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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}
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trait Higher<'a> {
@@ -24,5 +27,6 @@ impl Higher<'_> for () {
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fn hrtb() -> impl for<'a> Higher<'a, Output = impl Sized> {}
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//~^ ERROR `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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//~| WARN this changes meaning in Rust 2024
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fn main() {}

‎tests/ui/impl-trait/precise-capturing/overcaptures-2024.stderr

Lines changed: 14 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,8 @@ error: `impl Sized` will capture more lifetimes than possibly intended in editio
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LL | fn named<'a>(x: &'a i32) -> impl Sized { *x }
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| ^^^^^^^^^^
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|
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= warning: this changes meaning in Rust 2024
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/rpit-lifetime-capture.html>
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note: specifically, this lifetime is in scope but not mentioned in the type's bounds
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--> $DIR/overcaptures-2024.rs:6:10
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|
@@ -21,13 +23,15 @@ LL | fn named<'a>(x: &'a i32) -> impl Sized + use<> { *x }
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| +++++++
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error: `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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--> $DIR/overcaptures-2024.rs:9:25
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--> $DIR/overcaptures-2024.rs:10:25
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|
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LL | fn implicit(x: &i32) -> impl Sized { *x }
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| ^^^^^^^^^^
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|
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= warning: this changes meaning in Rust 2024
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/rpit-lifetime-capture.html>
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note: specifically, this lifetime is in scope but not mentioned in the type's bounds
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--> $DIR/overcaptures-2024.rs:9:16
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--> $DIR/overcaptures-2024.rs:10:16
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|
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LL | fn implicit(x: &i32) -> impl Sized { *x }
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| ^
@@ -38,13 +42,15 @@ LL | fn implicit(x: &i32) -> impl Sized + use<> { *x }
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| +++++++
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error: `impl Sized + '_` will capture more lifetimes than possibly intended in edition 2024
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--> $DIR/overcaptures-2024.rs:14:33
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--> $DIR/overcaptures-2024.rs:16:33
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|
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LL | fn hello(&self, x: &i32) -> impl Sized + '_ { self }
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| ^^^^^^^^^^^^^^^
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|
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= warning: this changes meaning in Rust 2024
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/rpit-lifetime-capture.html>
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note: specifically, this lifetime is in scope but not mentioned in the type's bounds
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--> $DIR/overcaptures-2024.rs:14:24
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--> $DIR/overcaptures-2024.rs:16:24
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|
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LL | fn hello(&self, x: &i32) -> impl Sized + '_ { self }
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| ^
@@ -55,13 +61,15 @@ LL | fn hello(&self, x: &i32) -> impl Sized + '_ + use<'_> { self }
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| +++++++++
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error: `impl Sized` will capture more lifetimes than possibly intended in edition 2024
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--> $DIR/overcaptures-2024.rs:25:47
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--> $DIR/overcaptures-2024.rs:28:47
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|
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LL | fn hrtb() -> impl for<'a> Higher<'a, Output = impl Sized> {}
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| ^^^^^^^^^^
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|
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= warning: this changes meaning in Rust 2024
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/rpit-lifetime-capture.html>
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note: specifically, this lifetime is in scope but not mentioned in the type's bounds
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--> $DIR/overcaptures-2024.rs:25:23
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--> $DIR/overcaptures-2024.rs:28:23
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|
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LL | fn hrtb() -> impl for<'a> Higher<'a, Output = impl Sized> {}
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| ^^

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