From 0999b019f8e0a96ca7aac9fd5ec095d59b0806ec Mon Sep 17 00:00:00 2001 From: Josh Stone Date: Tue, 24 Sep 2024 14:25:16 -0700 Subject: Dogfood `feature(file_buffered)` --- compiler/rustc_interface/src/lib.rs | 1 + compiler/rustc_interface/src/passes.rs | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/lib.rs b/compiler/rustc_interface/src/lib.rs index 94ebe51f213..b81a7402701 100644 --- a/compiler/rustc_interface/src/lib.rs +++ b/compiler/rustc_interface/src/lib.rs @@ -1,5 +1,6 @@ // tidy-alphabetical-start #![feature(decl_macro)] +#![feature(file_buffered)] #![feature(let_chains)] #![feature(try_blocks)] #![warn(unreachable_pub)] diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index 617581cf667..bba517915a2 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -519,7 +519,7 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P write_deps_to_file(&mut file)?; } OutFileName::Real(ref path) => { - let mut file = BufWriter::new(fs::File::create(path)?); + let mut file = fs::File::create_buffered(path)?; write_deps_to_file(&mut file)?; } } -- cgit 1.4.1-3-g733a5 From 01a063f9df39fd7442874726afd8c9583987da44 Mon Sep 17 00:00:00 2001 From: León Orell Valerian Liehr Date: Wed, 25 Sep 2024 10:38:40 +0200 Subject: Compiler: Rename "object safe" to "dyn compatible" --- compiler/rustc_const_eval/src/interpret/call.rs | 2 +- .../rustc_error_codes/src/error_codes/E0038.md | 33 +- compiler/rustc_error_codes/src/lib.rs | 2 +- compiler/rustc_feature/src/unstable.rs | 5 +- compiler/rustc_hir_analysis/messages.ftl | 2 +- compiler/rustc_hir_analysis/src/check/wfcheck.rs | 11 +- compiler/rustc_hir_analysis/src/coherence/mod.rs | 7 +- .../rustc_hir_analysis/src/coherence/orphan.rs | 10 +- .../src/hir_ty_lowering/dyn_compatibility.rs | 378 +++++++++ .../src/hir_ty_lowering/errors.rs | 14 +- .../rustc_hir_analysis/src/hir_ty_lowering/lint.rs | 22 +- .../rustc_hir_analysis/src/hir_ty_lowering/mod.rs | 2 +- .../src/hir_ty_lowering/object_safety.rs | 376 --------- compiler/rustc_hir_typeck/src/coercion.rs | 2 +- compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs | 2 +- .../src/fn_ctxt/inspect_obligations.rs | 2 +- compiler/rustc_hir_typeck/src/method/confirm.rs | 2 +- compiler/rustc_hir_typeck/src/method/probe.rs | 4 +- compiler/rustc_interface/src/passes.rs | 2 +- compiler/rustc_lint/messages.ftl | 2 +- .../src/multiple_supertrait_upcastable.rs | 8 +- compiler/rustc_middle/src/arena.rs | 2 +- compiler/rustc_middle/src/query/mod.rs | 12 +- compiler/rustc_middle/src/traits/mod.rs | 104 +-- compiler/rustc_middle/src/ty/context.rs | 4 +- compiler/rustc_middle/src/ty/flags.rs | 2 +- compiler/rustc_middle/src/ty/instance.rs | 2 +- compiler/rustc_middle/src/ty/predicate.rs | 8 +- compiler/rustc_middle/src/ty/print/pretty.rs | 4 +- compiler/rustc_middle/src/ty/util.rs | 2 +- compiler/rustc_monomorphize/src/collector.rs | 2 +- .../src/solve/assembly/mod.rs | 4 +- .../src/solve/eval_ctxt/mod.rs | 4 +- compiler/rustc_next_trait_solver/src/solve/mod.rs | 4 +- .../src/solve/trait_goals.rs | 4 +- .../src/cfi/typeid/itanium_cxx_abi/transform.rs | 4 +- compiler/rustc_smir/src/rustc_smir/convert/ty.rs | 4 +- .../error_reporting/traits/fulfillment_errors.rs | 16 +- .../src/error_reporting/traits/mod.rs | 15 +- .../rustc_trait_selection/src/solve/fulfill.rs | 2 +- .../rustc_trait_selection/src/traits/auto_trait.rs | 2 +- .../src/traits/dyn_compatibility.rs | 936 ++++++++++++++++++++ .../rustc_trait_selection/src/traits/fulfill.rs | 6 +- compiler/rustc_trait_selection/src/traits/mod.rs | 12 +- .../src/traits/object_safety.rs | 940 --------------------- .../query/type_op/implied_outlives_bounds.rs | 4 +- .../src/traits/select/candidate_assembly.rs | 2 +- .../src/traits/select/confirmation.rs | 10 +- .../rustc_trait_selection/src/traits/select/mod.rs | 4 +- compiler/rustc_trait_selection/src/traits/wf.rs | 2 +- .../rustc_traits/src/normalize_erasing_regions.rs | 2 +- compiler/rustc_type_ir/src/interner.rs | 2 +- compiler/rustc_type_ir/src/predicate_kind.rs | 8 +- compiler/stable_mir/src/ty.rs | 2 +- src/librustdoc/clean/types.rs | 2 +- .../invalid_const_in_lifetime_position.stderr | 2 +- tests/rustdoc-ui/issues/issue-105742.stderr | 2 +- .../associated-const-in-trait.stderr | 4 +- tests/ui/associated-item/issue-48027.stderr | 2 +- .../suggest-assoc-ty-bound-on-eq-bound.stderr | 4 +- tests/ui/async-await/async-fn/dyn-pos.stderr | 8 +- tests/ui/async-await/in-trait/object-safety.stderr | 2 +- .../async-await/inference_var_self_argument.stderr | 2 +- ...herence-impl-trait-for-trait-object-safe.stderr | 2 +- .../const_param_ty_object_safety.stderr | 4 +- .../generic_const_exprs/issue-102768.stderr | 2 +- .../object-safety-err-ret.stderr | 4 +- .../object-safety-err-where-bounds.stderr | 4 +- .../const-generics/not_wf_param_in_rpitit.stderr | 6 +- tests/ui/consts/const_refs_to_static-ice-121413.rs | 2 +- .../consts/const_refs_to_static-ice-121413.stderr | 2 +- tests/ui/did_you_mean/bad-assoc-ty.stderr | 2 +- ...ject-reference-without-parens-suggestion.stderr | 2 +- tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr | 6 +- tests/ui/dyn-keyword/dyn-angle-brackets.stderr | 2 +- tests/ui/error-codes/E0038.stderr | 4 +- .../dynless-turbofish-e0191-issue-91997.stderr | 2 +- ...ture-gate-dispatch-from-dyn-missing-impl.stderr | 4 +- .../feature-gate-object_safe_for_dispatch.stderr | 10 +- .../gat-in-trait-path-undeclared-lifetime.stderr | 2 +- .../gat-in-trait-path.base.stderr | 6 +- .../gat-trait-path-parenthesised-args.stderr | 4 +- .../issue-67510-pass.base.stderr | 2 +- .../ui/generic-associated-types/issue-67510.stderr | 2 +- .../ui/generic-associated-types/issue-71176.stderr | 4 +- .../issue-76535.base.stderr | 4 +- .../issue-78671.base.stderr | 2 +- .../issue-79422.base.stderr | 4 +- .../missing_lifetime_args.stderr | 2 +- .../trait-path-type-error-once-implemented.stderr | 2 +- .../trait-objects.base.stderr | 6 +- .../trait-bounds/span-bug-issue-121597.stderr | 4 +- ...resh-lifetime-from-bare-trait-obj-114664.stderr | 4 +- ...ective-visibilities-during-object-safety.stderr | 6 +- .../impl-trait/in-trait/foreign-dyn-error.stderr | 2 +- tests/ui/impl-trait/in-trait/object-safety.stderr | 8 +- ...nsafe-trait-in-return-position-dyn-trait.stderr | 8 +- tests/ui/issues/issue-18959.stderr | 10 +- tests/ui/issues/issue-19380.stderr | 6 +- tests/ui/issues/issue-26056.stderr | 2 +- tests/ui/issues/issue-28344.stderr | 4 +- tests/ui/issues/issue-34373.stderr | 2 +- tests/ui/issues/issue-50781.stderr | 6 +- tests/ui/issues/issue-58734.stderr | 2 +- tests/ui/issues/issue-86756.stderr | 2 +- .../kindck/kindck-inherited-copy-bound.curr.stderr | 4 +- ...ited-copy-bound.object_safe_for_dispatch.stderr | 2 +- tests/ui/lint/bare-trait-objects-path.stderr | 8 +- .../allowed-group-warn-by-default-lint.stderr | 2 +- tests/ui/lint/force-warn/cap-lints-allow.stderr | 2 +- ...t-group-allowed-cli-warn-by-default-lint.stderr | 2 +- .../lint-group-allowed-lint-group.stderr | 2 +- .../lint-group-allowed-warn-by-default-lint.stderr | 2 +- .../almost-supertrait-associated-type.stderr | 6 +- .../assoc_type_bounds_sized_unnecessary.rs | 2 +- .../assoc_type_bounds_sized_unnecessary.stderr | 2 +- .../avoid-ice-on-warning-2.new.stderr | 2 +- .../avoid-ice-on-warning-2.old.stderr | 6 +- .../avoid-ice-on-warning-3.new.stderr | 4 +- .../avoid-ice-on-warning-3.old.stderr | 16 +- .../object-safety/avoid-ice-on-warning.old.stderr | 2 +- .../bare-trait-dont-suggest-dyn.new.stderr | 2 +- .../bare-trait-dont-suggest-dyn.old.stderr | 4 +- tests/ui/object-safety/issue-102762.stderr | 6 +- tests/ui/object-safety/issue-19538.stderr | 4 +- .../object-safety-associated-consts.curr.stderr | 4 +- ...sociated-consts.object_safe_for_dispatch.stderr | 2 +- tests/ui/object-safety/object-safety-bounds.stderr | 2 +- .../object-safety-generics.curr.stderr | 10 +- ...safety-generics.object_safe_for_dispatch.stderr | 4 +- .../object-safety/object-safety-issue-22040.stderr | 6 +- .../object-safety-mentions-Self.curr.stderr | 8 +- ...y-mentions-Self.object_safe_for_dispatch.stderr | 4 +- .../object-safety-no-static.curr.stderr | 6 +- ...afety-no-static.object_safe_for_dispatch.stderr | 2 +- .../object-safety-sized-2.curr.stderr | 4 +- ...-safety-sized-2.object_safe_for_dispatch.stderr | 2 +- .../object-safety/object-safety-sized.curr.stderr | 4 +- ...ct-safety-sized.object_safe_for_dispatch.stderr | 2 +- .../object-safety-supertrait-mentions-GAT.stderr | 2 +- .../object-safety-supertrait-mentions-Self.stderr | 2 +- tests/ui/parser/trait-object-trait-parens.stderr | 6 +- tests/ui/resolve/issue-3907-2.stderr | 2 +- ...rbitrary-self-types-not-object-safe.curr.stderr | 4 +- ...not-object-safe.object_safe_for_dispatch.stderr | 2 +- .../statics/unsizing-wfcheck-issue-127299.stderr | 6 +- tests/ui/suggestions/issue-116434-2015.rs | 8 +- tests/ui/suggestions/issue-116434-2015.stderr | 12 +- tests/ui/suggestions/issue-116434-2021.stderr | 4 +- tests/ui/suggestions/issue-61963.stderr | 4 +- tests/ui/suggestions/issue-98500.stderr | 2 +- .../object-unsafe-trait-references-self.stderr | 4 +- ...e-trait-should-use-self-2021-without-dyn.stderr | 18 +- ...object-unsafe-trait-should-use-self-2021.stderr | 4 +- .../object-unsafe-trait-should-use-self.stderr | 4 +- ...ject-unsafe-trait-should-use-where-sized.stderr | 2 +- .../suggest-swapping-self-ty-and-trait.stderr | 6 +- tests/ui/traits/alias/object-fail.stderr | 2 +- tests/ui/traits/bound/not-on-bare-trait.stderr | 2 +- tests/ui/traits/issue-20692.stderr | 4 +- tests/ui/traits/issue-28576.stderr | 2 +- tests/ui/traits/issue-38404.stderr | 6 +- tests/ui/traits/issue-38604.stderr | 4 +- tests/ui/traits/issue-72410.stderr | 2 +- tests/ui/traits/issue-78372.stderr | 2 +- tests/ui/traits/item-privacy.stderr | 2 +- .../supertrait-object-safety.stderr | 6 +- ...nonicalize-fresh-infer-vars-issue-103626.stderr | 2 +- tests/ui/traits/object/macro-matcher.stderr | 2 +- .../object/object-unsafe-missing-assoc-type.stderr | 8 +- tests/ui/traits/object/pretty.stderr | 2 +- tests/ui/traits/object/safety.stderr | 4 +- tests/ui/traits/test-2.stderr | 6 +- .../multiple_supertrait_upcastable.rs | 2 +- .../multiple_supertrait_upcastable.stderr | 2 +- .../ui/traits/unspecified-self-in-trait-ref.stderr | 10 +- ...arameter-defaults-referencing-Self-ppaux.stderr | 2 +- ...ice-hir-wf-check-anon-const-issue-122199.stderr | 18 +- ...ice-hir-wf-check-anon-const-issue-122989.stderr | 8 +- tests/ui/wf/issue-87495.stderr | 2 +- tests/ui/wf/wf-convert-unsafe-trait-obj-box.stderr | 6 +- tests/ui/wf/wf-convert-unsafe-trait-obj.stderr | 6 +- tests/ui/wf/wf-fn-where-clause.stderr | 2 +- tests/ui/wf/wf-object-safe.stderr | 2 +- tests/ui/wf/wf-unsafe-trait-obj-match.stderr | 4 +- 185 files changed, 1788 insertions(+), 1775 deletions(-) create mode 100644 compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs delete mode 100644 compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs create mode 100644 compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs delete mode 100644 compiler/rustc_trait_selection/src/traits/object_safety.rs (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_const_eval/src/interpret/call.rs b/compiler/rustc_const_eval/src/interpret/call.rs index f5a0a2c0ee3..19aa76bf1ea 100644 --- a/compiler/rustc_const_eval/src/interpret/call.rs +++ b/compiler/rustc_const_eval/src/interpret/call.rs @@ -598,7 +598,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> { // codegen'd / interpreted as virtual calls through the vtable. ty::InstanceKind::Virtual(def_id, idx) => { let mut args = args.to_vec(); - // We have to implement all "object safe receivers". So we have to go search for a + // We have to implement all "dyn-compatible receivers". So we have to go search for a // pointer or `dyn Trait` type, but it could be wrapped in newtypes. So recursively // unwrap those newtypes until we are there. // An `InPlace` does nothing here, we keep the original receiver intact. We can't diff --git a/compiler/rustc_error_codes/src/error_codes/E0038.md b/compiler/rustc_error_codes/src/error_codes/E0038.md index 8f8eabb1519..014d8c4f761 100644 --- a/compiler/rustc_error_codes/src/error_codes/E0038.md +++ b/compiler/rustc_error_codes/src/error_codes/E0038.md @@ -5,9 +5,9 @@ trait, written in type positions) but this was a bit too confusing, so we now write `dyn Trait`. Some traits are not allowed to be used as trait object types. The traits that -are allowed to be used as trait object types are called "object-safe" traits. -Attempting to use a trait object type for a trait that is not object-safe will -trigger error E0038. +are allowed to be used as trait object types are called "dyn-compatible"[^1] +traits. Attempting to use a trait object type for a trait that is not +dyn-compatible will trigger error E0038. Two general aspects of trait object types give rise to the restrictions: @@ -25,13 +25,16 @@ Two general aspects of trait object types give rise to the restrictions: objects with the same trait object type may point to vtables from different implementations. -The specific conditions that violate object-safety follow, most of which relate -to missing size information and vtable polymorphism arising from these aspects. +The specific conditions that violate dyn-compatibility follow, most of which +relate to missing size information and vtable polymorphism arising from these +aspects. + +[^1]: Formerly known as "object-safe". ### The trait requires `Self: Sized` Traits that are declared as `Trait: Sized` or which otherwise inherit a -constraint of `Self:Sized` are not object-safe. +constraint of `Self:Sized` are not dyn-compatible. The reasoning behind this is somewhat subtle. It derives from the fact that Rust requires (and defines) that every trait object type `dyn Trait` automatically @@ -58,7 +61,7 @@ implement a sized trait like `Trait:Sized`. So, rather than allow an exception to the rule that `dyn Trait` always implements `Trait`, Rust chooses to prohibit such a `dyn Trait` from existing at all. -Only unsized traits are considered object-safe. +Only unsized traits are considered dyn-compatible. Generally, `Self: Sized` is used to indicate that the trait should not be used as a trait object. If the trait comes from your own crate, consider removing @@ -103,8 +106,8 @@ fn call_foo(x: Box) { } ``` -If only some methods aren't object-safe, you can add a `where Self: Sized` bound -on them to mark them as explicitly unavailable to trait objects. The +If only some methods aren't dyn-compatible, you can add a `where Self: Sized` +bound on them to mark them as explicitly unavailable to trait objects. The functionality will still be available to all other implementers, including `Box` which is itself sized (assuming you `impl Trait for Box`). @@ -117,7 +120,7 @@ trait Trait { ``` Now, `foo()` can no longer be called on a trait object, but you will now be -allowed to make a trait object, and that will be able to call any object-safe +allowed to make a trait object, and that will be able to call any dyn-compatible methods. With such a bound, one can still call `foo()` on types implementing that trait that aren't behind trait objects. @@ -306,7 +309,7 @@ Here, the supertrait might have methods as follows: ``` trait Super { - fn get_a(&self) -> &A; // note that this is object safe! + fn get_a(&self) -> &A; // note that this is dyn-compatible! } ``` @@ -314,10 +317,10 @@ If the trait `Trait` was deriving from something like `Super` or `Super` (where `Foo` itself is `Foo`), this is okay, because given a type `get_a()` will definitely return an object of that type. -However, if it derives from `Super`, even though `Super` is object safe, -the method `get_a()` would return an object of unknown type when called on the -function. `Self` type parameters let us make object safe traits no longer safe, -so they are forbidden when specifying supertraits. +However, if it derives from `Super`, even though `Super` is +dyn-compatible, the method `get_a()` would return an object of unknown type when +called on the function. `Self` type parameters let us make dyn-compatible traits +no longer compatible, so they are forbidden when specifying supertraits. There's no easy fix for this. Generally, code will need to be refactored so that you no longer need to derive from `Super`. diff --git a/compiler/rustc_error_codes/src/lib.rs b/compiler/rustc_error_codes/src/lib.rs index 8631de65ec8..27a34d6003d 100644 --- a/compiler/rustc_error_codes/src/lib.rs +++ b/compiler/rustc_error_codes/src/lib.rs @@ -623,7 +623,7 @@ E0800: 0800, // E0314, // closure outlives stack frame // E0315, // cannot invoke closure outside of its lifetime // E0319, // trait impls for defaulted traits allowed just for structs/enums -// E0372, // coherence not object safe +// E0372, // coherence not dyn-compatible // E0385, // {} in an aliasable location // E0402, // cannot use an outer type parameter in this context // E0406, // merged into 420 diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs index 63b4b272f76..d304a52fbd5 100644 --- a/compiler/rustc_feature/src/unstable.rs +++ b/compiler/rustc_feature/src/unstable.rs @@ -548,9 +548,12 @@ declare_features! ( (unstable, non_exhaustive_omitted_patterns_lint, "1.57.0", Some(89554)), /// Allows `for` binders in where-clauses (incomplete, non_lifetime_binders, "1.69.0", Some(108185)), - /// Allows making `dyn Trait` well-formed even if `Trait` is not object safe. + /// Allows making `dyn Trait` well-formed even if `Trait` is not dyn-compatible[^1]. /// In that case, `dyn Trait: Trait` does not hold. Moreover, coercions and /// casts in safe Rust to `dyn Trait` for such a `Trait` is also forbidden. + /// + /// [^1]: Formerly known as "object safe". + // FIXME(dyn_compat_renaming): Rename feature. (unstable, object_safe_for_dispatch, "1.40.0", Some(43561)), /// Allows using enums in offset_of! (unstable, offset_of_enum, "1.75.0", Some(120141)), diff --git a/compiler/rustc_hir_analysis/messages.ftl b/compiler/rustc_hir_analysis/messages.ftl index 09d466339ff..c73826c489f 100644 --- a/compiler/rustc_hir_analysis/messages.ftl +++ b/compiler/rustc_hir_analysis/messages.ftl @@ -558,7 +558,7 @@ hir_analysis_unrecognized_intrinsic_function = .help = if you're adding an intrinsic, be sure to update `check_intrinsic_type` hir_analysis_unused_associated_type_bounds = - unnecessary associated type bound for not object safe associated type + unnecessary associated type bound for dyn-incompatible associated type .note = this associated type has a `where Self: Sized` bound, and while the associated type can be specified, it cannot be used because trait objects are never `Sized` .suggestion = remove this bound diff --git a/compiler/rustc_hir_analysis/src/check/wfcheck.rs b/compiler/rustc_hir_analysis/src/check/wfcheck.rs index f8a19e93a41..a71e14ce463 100644 --- a/compiler/rustc_hir_analysis/src/check/wfcheck.rs +++ b/compiler/rustc_hir_analysis/src/check/wfcheck.rs @@ -374,7 +374,7 @@ fn check_trait_item<'tcx>( hir::TraitItemKind::Type(_bounds, Some(ty)) => (None, ty.span), _ => (None, trait_item.span), }; - check_object_unsafe_self_trait_by_name(tcx, trait_item); + check_dyn_incompatible_self_trait_by_name(tcx, trait_item); let mut res = check_associated_item(tcx, def_id, span, method_sig); if matches!(trait_item.kind, hir::TraitItemKind::Fn(..)) { @@ -838,9 +838,10 @@ fn could_be_self(trait_def_id: LocalDefId, ty: &hir::Ty<'_>) -> bool { } } -/// Detect when an object unsafe trait is referring to itself in one of its associated items. -/// When this is done, suggest using `Self` instead. -fn check_object_unsafe_self_trait_by_name(tcx: TyCtxt<'_>, item: &hir::TraitItem<'_>) { +/// Detect when a dyn-incompatible trait is referring to itself in one of its associated items. +/// +/// In such cases, suggest using `Self` instead. +fn check_dyn_incompatible_self_trait_by_name(tcx: TyCtxt<'_>, item: &hir::TraitItem<'_>) { let (trait_name, trait_def_id) = match tcx.hir_node_by_def_id(tcx.hir().get_parent_item(item.hir_id()).def_id) { hir::Node::Item(item) => match item.kind { @@ -872,7 +873,7 @@ fn check_object_unsafe_self_trait_by_name(tcx: TyCtxt<'_>, item: &hir::TraitItem _ => {} } if !trait_should_be_self.is_empty() { - if tcx.is_object_safe(trait_def_id) { + if tcx.is_dyn_compatible(trait_def_id) { return; } let sugg = trait_should_be_self.iter().map(|span| (*span, "Self".to_string())).collect(); diff --git a/compiler/rustc_hir_analysis/src/coherence/mod.rs b/compiler/rustc_hir_analysis/src/coherence/mod.rs index 185f3176f07..8c3c6875119 100644 --- a/compiler/rustc_hir_analysis/src/coherence/mod.rs +++ b/compiler/rustc_hir_analysis/src/coherence/mod.rs @@ -179,8 +179,8 @@ fn check_object_overlap<'tcx>( // check for overlap with the automatic `impl Trait for dyn Trait` if let ty::Dynamic(data, ..) = trait_ref.self_ty().kind() { - // This is something like impl Trait1 for Trait2. Illegal - // if Trait1 is a supertrait of Trait2 or Trait2 is not object safe. + // This is something like `impl Trait1 for Trait2`. Illegal if + // Trait1 is a supertrait of Trait2 or Trait2 is not dyn-compatible. let component_def_ids = data.iter().flat_map(|predicate| { match predicate.skip_binder() { @@ -193,7 +193,8 @@ fn check_object_overlap<'tcx>( }); for component_def_id in component_def_ids { - if !tcx.is_object_safe(component_def_id) { + if !tcx.is_dyn_compatible(component_def_id) { + // FIXME(dyn_compat_renaming): Rename test and update comment. // Without the 'object_safe_for_dispatch' feature this is an error // which will be reported by wfcheck. Ignore it here. // This is tested by `coherence-impl-trait-for-trait-object-safe.rs`. diff --git a/compiler/rustc_hir_analysis/src/coherence/orphan.rs b/compiler/rustc_hir_analysis/src/coherence/orphan.rs index 5fdaba41fb2..04770469132 100644 --- a/compiler/rustc_hir_analysis/src/coherence/orphan.rs +++ b/compiler/rustc_hir_analysis/src/coherence/orphan.rs @@ -109,16 +109,16 @@ pub(crate) fn orphan_check_impl( // // auto trait AutoTrait {} // - // trait ObjectSafeTrait { + // trait DynCompatibleTrait { // fn f(&self) where Self: AutoTrait; // } // - // We can allow f to be called on `dyn ObjectSafeTrait + AutoTrait`. + // We can allow f to be called on `dyn DynCompatibleTrait + AutoTrait`. // // If we didn't deny `impl AutoTrait for dyn Trait`, it would be unsound - // for the ObjectSafeTrait shown above to be object safe because someone - // could take some type implementing ObjectSafeTrait but not AutoTrait, - // unsize it to `dyn ObjectSafeTrait`, and call .f() which has no + // for the `DynCompatibleTrait` shown above to be dyn-compatible because someone + // could take some type implementing `DynCompatibleTrait` but not `AutoTrait`, + // unsize it to `dyn DynCompatibleTrait`, and call `.f()` which has no // concrete implementation (issue #50781). enum LocalImpl { Allow, diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs new file mode 100644 index 00000000000..e7b8e6e69b0 --- /dev/null +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs @@ -0,0 +1,378 @@ +use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet}; +use rustc_errors::codes::*; +use rustc_errors::struct_span_code_err; +use rustc_hir as hir; +use rustc_hir::def::{DefKind, Res}; +use rustc_hir::def_id::DefId; +use rustc_lint_defs::builtin::UNUSED_ASSOCIATED_TYPE_BOUNDS; +use rustc_middle::span_bug; +use rustc_middle::ty::fold::BottomUpFolder; +use rustc_middle::ty::{ + self, DynKind, ExistentialPredicateStableCmpExt as _, Ty, TyCtxt, TypeFoldable, Upcast, +}; +use rustc_span::{ErrorGuaranteed, Span}; +use rustc_trait_selection::error_reporting::traits::report_dyn_incompatibility; +use rustc_trait_selection::traits::{self, hir_ty_lowering_dyn_compatibility_violations}; +use smallvec::{SmallVec, smallvec}; +use tracing::{debug, instrument}; + +use super::HirTyLowerer; +use crate::bounds::Bounds; +use crate::hir_ty_lowering::{ + GenericArgCountMismatch, GenericArgCountResult, OnlySelfBounds, RegionInferReason, +}; + +impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { + /// Lower a trait object type from the HIR to our internal notion of a type. + #[instrument(level = "debug", skip_all, ret)] + pub(super) fn lower_trait_object_ty( + &self, + span: Span, + hir_id: hir::HirId, + hir_trait_bounds: &[(hir::PolyTraitRef<'tcx>, hir::TraitBoundModifier)], + lifetime: &hir::Lifetime, + representation: DynKind, + ) -> Ty<'tcx> { + let tcx = self.tcx(); + + let mut bounds = Bounds::default(); + let mut potential_assoc_types = Vec::new(); + let dummy_self = self.tcx().types.trait_object_dummy_self; + for (trait_bound, modifier) in hir_trait_bounds.iter().rev() { + if *modifier == hir::TraitBoundModifier::Maybe { + continue; + } + if let GenericArgCountResult { + correct: + Err(GenericArgCountMismatch { invalid_args: cur_potential_assoc_types, .. }), + .. + } = self.lower_poly_trait_ref( + &trait_bound.trait_ref, + trait_bound.span, + ty::BoundConstness::NotConst, + ty::PredicatePolarity::Positive, + dummy_self, + &mut bounds, + // True so we don't populate `bounds` with associated type bounds, even + // though they're disallowed from object types. + OnlySelfBounds(true), + ) { + potential_assoc_types.extend(cur_potential_assoc_types); + } + } + + let mut trait_bounds = vec![]; + let mut projection_bounds = vec![]; + for (pred, span) in bounds.clauses(tcx) { + let bound_pred = pred.kind(); + match bound_pred.skip_binder() { + ty::ClauseKind::Trait(trait_pred) => { + assert_eq!(trait_pred.polarity, ty::PredicatePolarity::Positive); + trait_bounds.push((bound_pred.rebind(trait_pred.trait_ref), span)); + } + ty::ClauseKind::Projection(proj) => { + projection_bounds.push((bound_pred.rebind(proj), span)); + } + ty::ClauseKind::TypeOutlives(_) => { + // Do nothing, we deal with regions separately + } + ty::ClauseKind::RegionOutlives(_) + | ty::ClauseKind::ConstArgHasType(..) + | ty::ClauseKind::WellFormed(_) + | ty::ClauseKind::ConstEvaluatable(_) => { + span_bug!(span, "did not expect {pred} clause in object bounds"); + } + } + } + + // Expand trait aliases recursively and check that only one regular (non-auto) trait + // is used and no 'maybe' bounds are used. + let expanded_traits = + traits::expand_trait_aliases(tcx, trait_bounds.iter().map(|&(a, b)| (a, b))); + + let (mut auto_traits, regular_traits): (Vec<_>, Vec<_>) = + expanded_traits.partition(|i| tcx.trait_is_auto(i.trait_ref().def_id())); + if regular_traits.len() > 1 { + let _ = self.report_trait_object_addition_traits_error(®ular_traits); + } else if regular_traits.is_empty() && auto_traits.is_empty() { + let reported = self.report_trait_object_with_no_traits_error(span, &trait_bounds); + return Ty::new_error(tcx, reported); + } + + // Check that there are no gross dyn-compatibility violations; + // most importantly, that the supertraits don't contain `Self`, + // to avoid ICEs. + for item in ®ular_traits { + let violations = + hir_ty_lowering_dyn_compatibility_violations(tcx, item.trait_ref().def_id()); + if !violations.is_empty() { + let reported = report_dyn_incompatibility( + tcx, + span, + Some(hir_id), + item.trait_ref().def_id(), + &violations, + ) + .emit(); + return Ty::new_error(tcx, reported); + } + } + + let mut associated_types: FxIndexMap> = FxIndexMap::default(); + + let regular_traits_refs_spans = trait_bounds + .into_iter() + .filter(|(trait_ref, _)| !tcx.trait_is_auto(trait_ref.def_id())); + + for (base_trait_ref, span) in regular_traits_refs_spans { + let base_pred: ty::Predicate<'tcx> = base_trait_ref.upcast(tcx); + for pred in traits::elaborate(tcx, [base_pred]).filter_only_self() { + debug!("observing object predicate `{pred:?}`"); + + let bound_predicate = pred.kind(); + match bound_predicate.skip_binder() { + ty::PredicateKind::Clause(ty::ClauseKind::Trait(pred)) => { + let pred = bound_predicate.rebind(pred); + associated_types.entry(span).or_default().extend( + tcx.associated_items(pred.def_id()) + .in_definition_order() + .filter(|item| item.kind == ty::AssocKind::Type) + .filter(|item| { + !item.is_impl_trait_in_trait() && !item.is_effects_desugaring + }) + .map(|item| item.def_id), + ); + } + ty::PredicateKind::Clause(ty::ClauseKind::Projection(pred)) => { + let pred = bound_predicate.rebind(pred); + // A `Self` within the original bound will be instantiated with a + // `trait_object_dummy_self`, so check for that. + let references_self = match pred.skip_binder().term.unpack() { + ty::TermKind::Ty(ty) => ty.walk().any(|arg| arg == dummy_self.into()), + // FIXME(associated_const_equality): We should walk the const instead of not doing anything + ty::TermKind::Const(_) => false, + }; + + // If the projection output contains `Self`, force the user to + // elaborate it explicitly to avoid a lot of complexity. + // + // The "classically useful" case is the following: + // ``` + // trait MyTrait: FnMut() -> ::MyOutput { + // type MyOutput; + // } + // ``` + // + // Here, the user could theoretically write `dyn MyTrait`, + // but actually supporting that would "expand" to an infinitely-long type + // `fix $ τ → dyn MyTrait::MyOutput`. + // + // Instead, we force the user to write + // `dyn MyTrait`, which is uglier but works. See + // the discussion in #56288 for alternatives. + if !references_self { + // Include projections defined on supertraits. + projection_bounds.push((pred, span)); + } + } + _ => (), + } + } + } + + // `dyn Trait` desugars to (not Rust syntax) `dyn Trait where ::Assoc = Foo`. + // So every `Projection` clause is an `Assoc = Foo` bound. `associated_types` contains all associated + // types's `DefId`, so the following loop removes all the `DefIds` of the associated types that have a + // corresponding `Projection` clause + for def_ids in associated_types.values_mut() { + for (projection_bound, span) in &projection_bounds { + let def_id = projection_bound.projection_def_id(); + // FIXME(#120456) - is `swap_remove` correct? + def_ids.swap_remove(&def_id); + if tcx.generics_require_sized_self(def_id) { + tcx.emit_node_span_lint( + UNUSED_ASSOCIATED_TYPE_BOUNDS, + hir_id, + *span, + crate::errors::UnusedAssociatedTypeBounds { span: *span }, + ); + } + } + // If the associated type has a `where Self: Sized` bound, we do not need to constrain the associated + // type in the `dyn Trait`. + def_ids.retain(|def_id| !tcx.generics_require_sized_self(def_id)); + } + + self.complain_about_missing_assoc_tys( + associated_types, + potential_assoc_types, + hir_trait_bounds, + ); + + // De-duplicate auto traits so that, e.g., `dyn Trait + Send + Send` is the same as + // `dyn Trait + Send`. + // We remove duplicates by inserting into a `FxHashSet` to avoid re-ordering + // the bounds + let mut duplicates = FxHashSet::default(); + auto_traits.retain(|i| duplicates.insert(i.trait_ref().def_id())); + debug!(?regular_traits); + debug!(?auto_traits); + + // Erase the `dummy_self` (`trait_object_dummy_self`) used above. + let existential_trait_refs = regular_traits.iter().map(|i| { + i.trait_ref().map_bound(|trait_ref: ty::TraitRef<'tcx>| { + assert_eq!(trait_ref.self_ty(), dummy_self); + + // Verify that `dummy_self` did not leak inside default type parameters. This + // could not be done at path creation, since we need to see through trait aliases. + let mut missing_type_params = vec![]; + let mut references_self = false; + let generics = tcx.generics_of(trait_ref.def_id); + let args: Vec<_> = trait_ref + .args + .iter() + .enumerate() + .skip(1) // Remove `Self` for `ExistentialPredicate`. + .map(|(index, arg)| { + if arg == dummy_self.into() { + let param = &generics.own_params[index]; + missing_type_params.push(param.name); + Ty::new_misc_error(tcx).into() + } else if arg.walk().any(|arg| arg == dummy_self.into()) { + references_self = true; + let guar = self.dcx().span_delayed_bug( + span, + "trait object trait bounds reference `Self`", + ); + replace_dummy_self_with_error(tcx, arg, guar) + } else { + arg + } + }) + .collect(); + let args = tcx.mk_args(&args); + + let span = i.bottom().1; + let empty_generic_args = hir_trait_bounds.iter().any(|(hir_bound, _)| { + hir_bound.trait_ref.path.res == Res::Def(DefKind::Trait, trait_ref.def_id) + && hir_bound.span.contains(span) + }); + self.complain_about_missing_type_params( + missing_type_params, + trait_ref.def_id, + span, + empty_generic_args, + ); + + if references_self { + let def_id = i.bottom().0.def_id(); + struct_span_code_err!( + self.dcx(), + i.bottom().1, + E0038, + "the {} `{}` cannot be made into an object", + tcx.def_descr(def_id), + tcx.item_name(def_id), + ) + .with_note( + rustc_middle::traits::DynCompatibilityViolation::SupertraitSelf( + smallvec![], + ) + .error_msg(), + ) + .emit(); + } + + ty::ExistentialTraitRef { def_id: trait_ref.def_id, args } + }) + }); + + let existential_projections = projection_bounds.iter().map(|(bound, _)| { + bound.map_bound(|mut b| { + assert_eq!(b.projection_term.self_ty(), dummy_self); + + // Like for trait refs, verify that `dummy_self` did not leak inside default type + // parameters. + let references_self = b.projection_term.args.iter().skip(1).any(|arg| { + if arg.walk().any(|arg| arg == dummy_self.into()) { + return true; + } + false + }); + if references_self { + let guar = tcx + .dcx() + .span_delayed_bug(span, "trait object projection bounds reference `Self`"); + b.projection_term = replace_dummy_self_with_error(tcx, b.projection_term, guar); + } + + ty::ExistentialProjection::erase_self_ty(tcx, b) + }) + }); + + let regular_trait_predicates = existential_trait_refs + .map(|trait_ref| trait_ref.map_bound(ty::ExistentialPredicate::Trait)); + let auto_trait_predicates = auto_traits.into_iter().map(|trait_ref| { + ty::Binder::dummy(ty::ExistentialPredicate::AutoTrait(trait_ref.trait_ref().def_id())) + }); + // N.b. principal, projections, auto traits + // FIXME: This is actually wrong with multiple principals in regards to symbol mangling + let mut v = regular_trait_predicates + .chain( + existential_projections.map(|x| x.map_bound(ty::ExistentialPredicate::Projection)), + ) + .chain(auto_trait_predicates) + .collect::>(); + v.sort_by(|a, b| a.skip_binder().stable_cmp(tcx, &b.skip_binder())); + v.dedup(); + let existential_predicates = tcx.mk_poly_existential_predicates(&v); + + // Use explicitly-specified region bound, unless the bound is missing. + let region_bound = if !lifetime.is_elided() { + self.lower_lifetime(lifetime, RegionInferReason::ExplicitObjectLifetime) + } else { + self.compute_object_lifetime_bound(span, existential_predicates).unwrap_or_else(|| { + // Curiously, we prefer object lifetime default for `+ '_`... + if tcx.named_bound_var(lifetime.hir_id).is_some() { + self.lower_lifetime(lifetime, RegionInferReason::ExplicitObjectLifetime) + } else { + let reason = + if let hir::LifetimeName::ImplicitObjectLifetimeDefault = lifetime.res { + if let hir::Node::Ty(hir::Ty { + kind: hir::TyKind::Ref(parent_lifetime, _), + .. + }) = tcx.parent_hir_node(hir_id) + && tcx.named_bound_var(parent_lifetime.hir_id).is_none() + { + // Parent lifetime must have failed to resolve. Don't emit a redundant error. + RegionInferReason::ExplicitObjectLifetime + } else { + RegionInferReason::ObjectLifetimeDefault + } + } else { + RegionInferReason::ExplicitObjectLifetime + }; + self.re_infer(span, reason) + } + }) + }; + debug!(?region_bound); + + Ty::new_dynamic(tcx, existential_predicates, region_bound, representation) + } +} + +fn replace_dummy_self_with_error<'tcx, T: TypeFoldable>>( + tcx: TyCtxt<'tcx>, + t: T, + guar: ErrorGuaranteed, +) -> T { + t.fold_with(&mut BottomUpFolder { + tcx, + ty_op: |ty| { + if ty == tcx.types.trait_object_dummy_self { Ty::new_error(tcx, guar) } else { ty } + }, + lt_op: |lt| lt, + ct_op: |ct| ct, + }) +} diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs index 5e3203e8473..eaecd6b9b61 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs @@ -19,9 +19,9 @@ use rustc_session::parse::feature_err; use rustc_span::edit_distance::find_best_match_for_name; use rustc_span::symbol::{Ident, kw, sym}; use rustc_span::{BytePos, DUMMY_SP, Span, Symbol}; -use rustc_trait_selection::error_reporting::traits::report_object_safety_error; +use rustc_trait_selection::error_reporting::traits::report_dyn_incompatibility; use rustc_trait_selection::traits::{ - FulfillmentError, TraitAliasExpansionInfo, object_safety_violations_for_assoc_item, + FulfillmentError, TraitAliasExpansionInfo, dyn_compatibility_violations_for_assoc_item, }; use crate::errors::{ @@ -739,7 +739,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { // Account for things like `dyn Foo + 'a`, like in tests `issue-22434.rs` and // `issue-22560.rs`. let mut trait_bound_spans: Vec = vec![]; - let mut object_safety_violations = false; + let mut dyn_compatibility_violations = false; for (span, items) in &associated_types { if !items.is_empty() { trait_bound_spans.push(*span); @@ -750,14 +750,14 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { names_len += 1; let violations = - object_safety_violations_for_assoc_item(tcx, trait_def_id, *assoc_item); + dyn_compatibility_violations_for_assoc_item(tcx, trait_def_id, *assoc_item); if !violations.is_empty() { - report_object_safety_error(tcx, *span, None, trait_def_id, &violations).emit(); - object_safety_violations = true; + report_dyn_incompatibility(tcx, *span, None, trait_def_id, &violations).emit(); + dyn_compatibility_violations = true; } } } - if object_safety_violations { + if dyn_compatibility_violations { return; } diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/lint.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/lint.rs index 1fbf70fa201..a70f881f5fe 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/lint.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/lint.rs @@ -77,7 +77,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { if self_ty.span.can_be_used_for_suggestions() && !self.maybe_suggest_impl_trait(self_ty, &mut diag) { - // FIXME: Only emit this suggestion if the trait is object safe. + // FIXME: Only emit this suggestion if the trait is dyn-compatible. diag.multipart_suggestion_verbose(label, sugg, Applicability::MachineApplicable); } // Check if the impl trait that we are considering is an impl of a local trait. @@ -89,7 +89,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { lint.primary_message("trait objects without an explicit `dyn` are deprecated"); if self_ty.span.can_be_used_for_suggestions() { lint.multipart_suggestion_verbose( - "if this is an object-safe trait, use `dyn`", + "if this is a dyn-compatible trait, use `dyn`", sugg, Applicability::MachineApplicable, ); @@ -196,7 +196,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { let mut is_downgradable = true; // Check if trait object is safe for suggesting dynamic dispatch. - let is_object_safe = match self_ty.kind { + let is_dyn_compatible = match self_ty.kind { hir::TyKind::TraitObject(objects, ..) => { objects.iter().all(|(o, _)| match o.trait_ref.path.res { Res::Def(DefKind::Trait, id) => { @@ -204,7 +204,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { // For recursive traits, don't downgrade the error. (#119652) is_downgradable = false; } - tcx.is_object_safe(id) + tcx.is_dyn_compatible(id) } _ => false, }) @@ -221,8 +221,8 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { if let hir::FnRetTy::Return(ty) = sig.decl.output && ty.peel_refs().hir_id == self_ty.hir_id { - let pre = if !is_object_safe { - format!("`{trait_name}` is not object safe, ") + let pre = if !is_dyn_compatible { + format!("`{trait_name}` is dyn-incompatible, ") } else { String::new() }; @@ -234,7 +234,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { diag.multipart_suggestion_verbose(msg, impl_sugg, Applicability::MachineApplicable); // Suggest `Box` for return type - if is_object_safe { + if is_dyn_compatible { // If the return type is `&Trait`, we don't want // the ampersand to be displayed in the `Box` // suggestion. @@ -253,7 +253,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { Applicability::MachineApplicable, ); } else if is_downgradable { - // We'll emit the object safety error already, with a structured suggestion. + // We'll emit the dyn-compatibility error already, with a structured suggestion. diag.downgrade_to_delayed_bug(); } return true; @@ -276,10 +276,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { impl_sugg, Applicability::MachineApplicable, ); - if !is_object_safe { - diag.note(format!("`{trait_name}` it is not object safe, so it can't be `dyn`")); + if !is_dyn_compatible { + diag.note(format!("`{trait_name}` it is dyn-incompatible, so it can't be `dyn`")); if is_downgradable { - // We'll emit the object safety error already, with a structured suggestion. + // We'll emit the dyn-compatibility error already, with a structured suggestion. diag.downgrade_to_delayed_bug(); } } else { diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs index e95b5142559..dfd2525c2b2 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs @@ -15,10 +15,10 @@ mod bounds; mod cmse; +mod dyn_compatibility; pub mod errors; pub mod generics; mod lint; -mod object_safety; use std::slice; diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs deleted file mode 100644 index 87a240f626c..00000000000 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs +++ /dev/null @@ -1,376 +0,0 @@ -use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet}; -use rustc_errors::codes::*; -use rustc_errors::struct_span_code_err; -use rustc_hir as hir; -use rustc_hir::def::{DefKind, Res}; -use rustc_hir::def_id::DefId; -use rustc_lint_defs::builtin::UNUSED_ASSOCIATED_TYPE_BOUNDS; -use rustc_middle::span_bug; -use rustc_middle::ty::fold::BottomUpFolder; -use rustc_middle::ty::{ - self, DynKind, ExistentialPredicateStableCmpExt as _, Ty, TyCtxt, TypeFoldable, Upcast, -}; -use rustc_span::{ErrorGuaranteed, Span}; -use rustc_trait_selection::error_reporting::traits::report_object_safety_error; -use rustc_trait_selection::traits::{self, hir_ty_lowering_object_safety_violations}; -use smallvec::{SmallVec, smallvec}; -use tracing::{debug, instrument}; - -use super::HirTyLowerer; -use crate::bounds::Bounds; -use crate::hir_ty_lowering::{ - GenericArgCountMismatch, GenericArgCountResult, OnlySelfBounds, RegionInferReason, -}; - -impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { - /// Lower a trait object type from the HIR to our internal notion of a type. - #[instrument(level = "debug", skip_all, ret)] - pub(super) fn lower_trait_object_ty( - &self, - span: Span, - hir_id: hir::HirId, - hir_trait_bounds: &[(hir::PolyTraitRef<'tcx>, hir::TraitBoundModifier)], - lifetime: &hir::Lifetime, - representation: DynKind, - ) -> Ty<'tcx> { - let tcx = self.tcx(); - - let mut bounds = Bounds::default(); - let mut potential_assoc_types = Vec::new(); - let dummy_self = self.tcx().types.trait_object_dummy_self; - for (trait_bound, modifier) in hir_trait_bounds.iter().rev() { - if *modifier == hir::TraitBoundModifier::Maybe { - continue; - } - if let GenericArgCountResult { - correct: - Err(GenericArgCountMismatch { invalid_args: cur_potential_assoc_types, .. }), - .. - } = self.lower_poly_trait_ref( - &trait_bound.trait_ref, - trait_bound.span, - ty::BoundConstness::NotConst, - ty::PredicatePolarity::Positive, - dummy_self, - &mut bounds, - // True so we don't populate `bounds` with associated type bounds, even - // though they're disallowed from object types. - OnlySelfBounds(true), - ) { - potential_assoc_types.extend(cur_potential_assoc_types); - } - } - - let mut trait_bounds = vec![]; - let mut projection_bounds = vec![]; - for (pred, span) in bounds.clauses(tcx) { - let bound_pred = pred.kind(); - match bound_pred.skip_binder() { - ty::ClauseKind::Trait(trait_pred) => { - assert_eq!(trait_pred.polarity, ty::PredicatePolarity::Positive); - trait_bounds.push((bound_pred.rebind(trait_pred.trait_ref), span)); - } - ty::ClauseKind::Projection(proj) => { - projection_bounds.push((bound_pred.rebind(proj), span)); - } - ty::ClauseKind::TypeOutlives(_) => { - // Do nothing, we deal with regions separately - } - ty::ClauseKind::RegionOutlives(_) - | ty::ClauseKind::ConstArgHasType(..) - | ty::ClauseKind::WellFormed(_) - | ty::ClauseKind::ConstEvaluatable(_) => { - span_bug!(span, "did not expect {pred} clause in object bounds"); - } - } - } - - // Expand trait aliases recursively and check that only one regular (non-auto) trait - // is used and no 'maybe' bounds are used. - let expanded_traits = - traits::expand_trait_aliases(tcx, trait_bounds.iter().map(|&(a, b)| (a, b))); - - let (mut auto_traits, regular_traits): (Vec<_>, Vec<_>) = - expanded_traits.partition(|i| tcx.trait_is_auto(i.trait_ref().def_id())); - if regular_traits.len() > 1 { - let _ = self.report_trait_object_addition_traits_error(®ular_traits); - } else if regular_traits.is_empty() && auto_traits.is_empty() { - let reported = self.report_trait_object_with_no_traits_error(span, &trait_bounds); - return Ty::new_error(tcx, reported); - } - - // Check that there are no gross object safety violations; - // most importantly, that the supertraits don't contain `Self`, - // to avoid ICEs. - for item in ®ular_traits { - let object_safety_violations = - hir_ty_lowering_object_safety_violations(tcx, item.trait_ref().def_id()); - if !object_safety_violations.is_empty() { - let reported = report_object_safety_error( - tcx, - span, - Some(hir_id), - item.trait_ref().def_id(), - &object_safety_violations, - ) - .emit(); - return Ty::new_error(tcx, reported); - } - } - - let mut associated_types: FxIndexMap> = FxIndexMap::default(); - - let regular_traits_refs_spans = trait_bounds - .into_iter() - .filter(|(trait_ref, _)| !tcx.trait_is_auto(trait_ref.def_id())); - - for (base_trait_ref, span) in regular_traits_refs_spans { - let base_pred: ty::Predicate<'tcx> = base_trait_ref.upcast(tcx); - for pred in traits::elaborate(tcx, [base_pred]).filter_only_self() { - debug!("observing object predicate `{pred:?}`"); - - let bound_predicate = pred.kind(); - match bound_predicate.skip_binder() { - ty::PredicateKind::Clause(ty::ClauseKind::Trait(pred)) => { - let pred = bound_predicate.rebind(pred); - associated_types.entry(span).or_default().extend( - tcx.associated_items(pred.def_id()) - .in_definition_order() - .filter(|item| item.kind == ty::AssocKind::Type) - .filter(|item| { - !item.is_impl_trait_in_trait() && !item.is_effects_desugaring - }) - .map(|item| item.def_id), - ); - } - ty::PredicateKind::Clause(ty::ClauseKind::Projection(pred)) => { - let pred = bound_predicate.rebind(pred); - // A `Self` within the original bound will be instantiated with a - // `trait_object_dummy_self`, so check for that. - let references_self = match pred.skip_binder().term.unpack() { - ty::TermKind::Ty(ty) => ty.walk().any(|arg| arg == dummy_self.into()), - // FIXME(associated_const_equality): We should walk the const instead of not doing anything - ty::TermKind::Const(_) => false, - }; - - // If the projection output contains `Self`, force the user to - // elaborate it explicitly to avoid a lot of complexity. - // - // The "classically useful" case is the following: - // ``` - // trait MyTrait: FnMut() -> ::MyOutput { - // type MyOutput; - // } - // ``` - // - // Here, the user could theoretically write `dyn MyTrait`, - // but actually supporting that would "expand" to an infinitely-long type - // `fix $ τ → dyn MyTrait::MyOutput`. - // - // Instead, we force the user to write - // `dyn MyTrait`, which is uglier but works. See - // the discussion in #56288 for alternatives. - if !references_self { - // Include projections defined on supertraits. - projection_bounds.push((pred, span)); - } - } - _ => (), - } - } - } - - // `dyn Trait` desugars to (not Rust syntax) `dyn Trait where ::Assoc = Foo`. - // So every `Projection` clause is an `Assoc = Foo` bound. `associated_types` contains all associated - // types's `DefId`, so the following loop removes all the `DefIds` of the associated types that have a - // corresponding `Projection` clause - for def_ids in associated_types.values_mut() { - for (projection_bound, span) in &projection_bounds { - let def_id = projection_bound.projection_def_id(); - // FIXME(#120456) - is `swap_remove` correct? - def_ids.swap_remove(&def_id); - if tcx.generics_require_sized_self(def_id) { - tcx.emit_node_span_lint( - UNUSED_ASSOCIATED_TYPE_BOUNDS, - hir_id, - *span, - crate::errors::UnusedAssociatedTypeBounds { span: *span }, - ); - } - } - // If the associated type has a `where Self: Sized` bound, we do not need to constrain the associated - // type in the `dyn Trait`. - def_ids.retain(|def_id| !tcx.generics_require_sized_self(def_id)); - } - - self.complain_about_missing_assoc_tys( - associated_types, - potential_assoc_types, - hir_trait_bounds, - ); - - // De-duplicate auto traits so that, e.g., `dyn Trait + Send + Send` is the same as - // `dyn Trait + Send`. - // We remove duplicates by inserting into a `FxHashSet` to avoid re-ordering - // the bounds - let mut duplicates = FxHashSet::default(); - auto_traits.retain(|i| duplicates.insert(i.trait_ref().def_id())); - debug!(?regular_traits); - debug!(?auto_traits); - - // Erase the `dummy_self` (`trait_object_dummy_self`) used above. - let existential_trait_refs = regular_traits.iter().map(|i| { - i.trait_ref().map_bound(|trait_ref: ty::TraitRef<'tcx>| { - assert_eq!(trait_ref.self_ty(), dummy_self); - - // Verify that `dummy_self` did not leak inside default type parameters. This - // could not be done at path creation, since we need to see through trait aliases. - let mut missing_type_params = vec![]; - let mut references_self = false; - let generics = tcx.generics_of(trait_ref.def_id); - let args: Vec<_> = trait_ref - .args - .iter() - .enumerate() - .skip(1) // Remove `Self` for `ExistentialPredicate`. - .map(|(index, arg)| { - if arg == dummy_self.into() { - let param = &generics.own_params[index]; - missing_type_params.push(param.name); - Ty::new_misc_error(tcx).into() - } else if arg.walk().any(|arg| arg == dummy_self.into()) { - references_self = true; - let guar = self.dcx().span_delayed_bug( - span, - "trait object trait bounds reference `Self`", - ); - replace_dummy_self_with_error(tcx, arg, guar) - } else { - arg - } - }) - .collect(); - let args = tcx.mk_args(&args); - - let span = i.bottom().1; - let empty_generic_args = hir_trait_bounds.iter().any(|(hir_bound, _)| { - hir_bound.trait_ref.path.res == Res::Def(DefKind::Trait, trait_ref.def_id) - && hir_bound.span.contains(span) - }); - self.complain_about_missing_type_params( - missing_type_params, - trait_ref.def_id, - span, - empty_generic_args, - ); - - if references_self { - let def_id = i.bottom().0.def_id(); - struct_span_code_err!( - self.dcx(), - i.bottom().1, - E0038, - "the {} `{}` cannot be made into an object", - tcx.def_descr(def_id), - tcx.item_name(def_id), - ) - .with_note( - rustc_middle::traits::ObjectSafetyViolation::SupertraitSelf(smallvec![]) - .error_msg(), - ) - .emit(); - } - - ty::ExistentialTraitRef { def_id: trait_ref.def_id, args } - }) - }); - - let existential_projections = projection_bounds.iter().map(|(bound, _)| { - bound.map_bound(|mut b| { - assert_eq!(b.projection_term.self_ty(), dummy_self); - - // Like for trait refs, verify that `dummy_self` did not leak inside default type - // parameters. - let references_self = b.projection_term.args.iter().skip(1).any(|arg| { - if arg.walk().any(|arg| arg == dummy_self.into()) { - return true; - } - false - }); - if references_self { - let guar = tcx - .dcx() - .span_delayed_bug(span, "trait object projection bounds reference `Self`"); - b.projection_term = replace_dummy_self_with_error(tcx, b.projection_term, guar); - } - - ty::ExistentialProjection::erase_self_ty(tcx, b) - }) - }); - - let regular_trait_predicates = existential_trait_refs - .map(|trait_ref| trait_ref.map_bound(ty::ExistentialPredicate::Trait)); - let auto_trait_predicates = auto_traits.into_iter().map(|trait_ref| { - ty::Binder::dummy(ty::ExistentialPredicate::AutoTrait(trait_ref.trait_ref().def_id())) - }); - // N.b. principal, projections, auto traits - // FIXME: This is actually wrong with multiple principals in regards to symbol mangling - let mut v = regular_trait_predicates - .chain( - existential_projections.map(|x| x.map_bound(ty::ExistentialPredicate::Projection)), - ) - .chain(auto_trait_predicates) - .collect::>(); - v.sort_by(|a, b| a.skip_binder().stable_cmp(tcx, &b.skip_binder())); - v.dedup(); - let existential_predicates = tcx.mk_poly_existential_predicates(&v); - - // Use explicitly-specified region bound, unless the bound is missing. - let region_bound = if !lifetime.is_elided() { - self.lower_lifetime(lifetime, RegionInferReason::ExplicitObjectLifetime) - } else { - self.compute_object_lifetime_bound(span, existential_predicates).unwrap_or_else(|| { - // Curiously, we prefer object lifetime default for `+ '_`... - if tcx.named_bound_var(lifetime.hir_id).is_some() { - self.lower_lifetime(lifetime, RegionInferReason::ExplicitObjectLifetime) - } else { - let reason = - if let hir::LifetimeName::ImplicitObjectLifetimeDefault = lifetime.res { - if let hir::Node::Ty(hir::Ty { - kind: hir::TyKind::Ref(parent_lifetime, _), - .. - }) = tcx.parent_hir_node(hir_id) - && tcx.named_bound_var(parent_lifetime.hir_id).is_none() - { - // Parent lifetime must have failed to resolve. Don't emit a redundant error. - RegionInferReason::ExplicitObjectLifetime - } else { - RegionInferReason::ObjectLifetimeDefault - } - } else { - RegionInferReason::ExplicitObjectLifetime - }; - self.re_infer(span, reason) - } - }) - }; - debug!(?region_bound); - - Ty::new_dynamic(tcx, existential_predicates, region_bound, representation) - } -} - -fn replace_dummy_self_with_error<'tcx, T: TypeFoldable>>( - tcx: TyCtxt<'tcx>, - t: T, - guar: ErrorGuaranteed, -) -> T { - t.fold_with(&mut BottomUpFolder { - tcx, - ty_op: |ty| { - if ty == tcx.types.trait_object_dummy_self { Ty::new_error(tcx, guar) } else { ty } - }, - lt_op: |lt| lt, - ct_op: |ct| ct, - }) -} diff --git a/compiler/rustc_hir_typeck/src/coercion.rs b/compiler/rustc_hir_typeck/src/coercion.rs index 7be91d78e19..2d4c7af4520 100644 --- a/compiler/rustc_hir_typeck/src/coercion.rs +++ b/compiler/rustc_hir_typeck/src/coercion.rs @@ -655,7 +655,7 @@ impl<'f, 'tcx> Coerce<'f, 'tcx> { return Err(TypeError::Mismatch); } - // Object safety violations or miscellaneous. + // Dyn-compatibility violations or miscellaneous. Err(err) => { self.err_ctxt().report_selection_error(obligation.clone(), &obligation, &err); // Treat this like an obligation and follow through diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs index 2c469c0d52c..62107877283 100644 --- a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs +++ b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs @@ -757,7 +757,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { // give us a `QPath::TypeRelative` with a trait object as // `qself`. In that case, we want to avoid registering a WF obligation // for `dyn MyTrait`, since we don't actually need the trait - // to be object-safe. + // to be dyn-compatible. // We manually call `register_wf_obligation` in the success path // below. let ty = self.lowerer().lower_ty(qself); diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/inspect_obligations.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/inspect_obligations.rs index 2dcab9ed004..2aad9a043f9 100644 --- a/compiler/rustc_hir_typeck/src/fn_ctxt/inspect_obligations.rs +++ b/compiler/rustc_hir_typeck/src/fn_ctxt/inspect_obligations.rs @@ -50,7 +50,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { | ty::PredicateKind::Clause(ty::ClauseKind::RegionOutlives(..)) | ty::PredicateKind::Clause(ty::ClauseKind::TypeOutlives(..)) | ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(..)) - | ty::PredicateKind::ObjectSafe(..) + | ty::PredicateKind::DynCompatible(..) | ty::PredicateKind::NormalizesTo(..) | ty::PredicateKind::AliasRelate(..) | ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..)) diff --git a/compiler/rustc_hir_typeck/src/method/confirm.rs b/compiler/rustc_hir_typeck/src/method/confirm.rs index e3b0fa78eb7..72842075fec 100644 --- a/compiler/rustc_hir_typeck/src/method/confirm.rs +++ b/compiler/rustc_hir_typeck/src/method/confirm.rs @@ -292,7 +292,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> { // distinct types (e.g., if `Self` appeared as an // argument type), but those cases have already // been ruled out when we deemed the trait to be - // "object safe". + // "dyn-compatible". let original_poly_trait_ref = principal.with_self_ty(this.tcx, object_ty); let upcast_poly_trait_ref = this.upcast(original_poly_trait_ref, trait_def_id); let upcast_trait_ref = diff --git a/compiler/rustc_hir_typeck/src/method/probe.rs b/compiler/rustc_hir_typeck/src/method/probe.rs index 3828b40b885..c2e33c1bcd4 100644 --- a/compiler/rustc_hir_typeck/src/method/probe.rs +++ b/compiler/rustc_hir_typeck/src/method/probe.rs @@ -779,8 +779,8 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> { }); // It is illegal to invoke a method on a trait instance that refers to - // the `Self` type. An [`ObjectSafetyViolation::SupertraitSelf`] error - // will be reported by `object_safety.rs` if the method refers to the + // the `Self` type. An [`DynCompatibilityViolation::SupertraitSelf`] error + // will be reported by `dyn_compatibility.rs` if the method refers to the // `Self` type anywhere other than the receiver. Here, we use a // instantiation that replaces `Self` with the object type itself. Hence, // a `&self` method will wind up with an argument type like `&dyn Trait`. diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index 617581cf667..ce1e0ed2959 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -912,7 +912,7 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> { let traits = tcx.traits(LOCAL_CRATE); for &tr in traits { - if !tcx.is_object_safe(tr) { + if !tcx.is_dyn_compatible(tr) { continue; } diff --git a/compiler/rustc_lint/messages.ftl b/compiler/rustc_lint/messages.ftl index edfc7e547e5..fe1e93e415c 100644 --- a/compiler/rustc_lint/messages.ftl +++ b/compiler/rustc_lint/messages.ftl @@ -516,7 +516,7 @@ lint_mixed_script_confusables = .includes_note = the usage includes {$includes} .note = please recheck to make sure their usages are indeed what you want -lint_multiple_supertrait_upcastable = `{$ident}` is object-safe and has multiple supertraits +lint_multiple_supertrait_upcastable = `{$ident}` is dyn-compatible and has multiple supertraits lint_named_argument_used_positionally = named argument `{$named_arg_name}` is not used by name .label_named_arg = this named argument is referred to by position in formatting string diff --git a/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs b/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs index 78468020c4d..9fde35f82d8 100644 --- a/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs +++ b/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs @@ -4,7 +4,7 @@ use rustc_session::{declare_lint, declare_lint_pass}; use crate::{LateContext, LateLintPass, LintContext}; declare_lint! { - /// The `multiple_supertrait_upcastable` lint detects when an object-safe trait has multiple + /// The `multiple_supertrait_upcastable` lint detects when a dyn-compatible trait has multiple /// supertraits. /// /// ### Example @@ -28,7 +28,7 @@ declare_lint! { /// additional overhead is justified. pub MULTIPLE_SUPERTRAIT_UPCASTABLE, Allow, - "detect when an object-safe trait has multiple supertraits", + "detect when a dyn-compatible trait has multiple supertraits", @feature_gate = multiple_supertrait_upcastable; } @@ -37,10 +37,10 @@ declare_lint_pass!(MultipleSupertraitUpcastable => [MULTIPLE_SUPERTRAIT_UPCASTAB impl<'tcx> LateLintPass<'tcx> for MultipleSupertraitUpcastable { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'tcx>) { let def_id = item.owner_id.to_def_id(); - // NOTE(nbdd0121): use `object_safety_violations` instead of `is_object_safe` because + // NOTE(nbdd0121): use `object_safety_violations` instead of `is_dyn_compatible` because // the latter will report `where_clause_object_safety` lint. if let hir::ItemKind::Trait(_, _, _, _, _) = item.kind - && cx.tcx.is_object_safe(def_id) + && cx.tcx.is_dyn_compatible(def_id) { let direct_super_traits_iter = cx .tcx diff --git a/compiler/rustc_middle/src/arena.rs b/compiler/rustc_middle/src/arena.rs index 7050a06b8dc..52fe9956b47 100644 --- a/compiler/rustc_middle/src/arena.rs +++ b/compiler/rustc_middle/src/arena.rs @@ -83,7 +83,7 @@ macro_rules! arena_types { >, [] effective_visibilities: rustc_middle::middle::privacy::EffectiveVisibilities, [] upvars_mentioned: rustc_data_structures::fx::FxIndexMap, - [] object_safety_violations: rustc_middle::traits::ObjectSafetyViolation, + [] dyn_compatibility_violations: rustc_middle::traits::DynCompatibilityViolation, [] codegen_unit: rustc_middle::mir::mono::CodegenUnit<'tcx>, [decode] attribute: rustc_ast::Attribute, [] name_set: rustc_data_structures::unord::UnordSet, diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs index 00036097ef5..6eea5767095 100644 --- a/compiler/rustc_middle/src/query/mod.rs +++ b/compiler/rustc_middle/src/query/mod.rs @@ -70,8 +70,8 @@ use crate::traits::query::{ MethodAutoderefStepsResult, NoSolution, NormalizationResult, OutlivesBound, }; use crate::traits::{ - CodegenObligationError, EvaluationResult, ImplSource, ObjectSafetyViolation, ObligationCause, - OverflowError, WellFormedLoc, specialization_graph, + CodegenObligationError, DynCompatibilityViolation, EvaluationResult, ImplSource, + ObligationCause, OverflowError, WellFormedLoc, specialization_graph, }; use crate::ty::fast_reject::SimplifiedType; use crate::ty::layout::ValidityRequirement; @@ -1338,11 +1338,11 @@ rustc_queries! { cache_on_disk_if { true } ensure_forwards_result_if_red } - query object_safety_violations(trait_id: DefId) -> &'tcx [ObjectSafetyViolation] { - desc { |tcx| "determining object safety of trait `{}`", tcx.def_path_str(trait_id) } + query dyn_compatibility_violations(trait_id: DefId) -> &'tcx [DynCompatibilityViolation] { + desc { |tcx| "determining dyn-compatibility of trait `{}`", tcx.def_path_str(trait_id) } } - query is_object_safe(trait_id: DefId) -> bool { - desc { |tcx| "checking if trait `{}` is object safe", tcx.def_path_str(trait_id) } + query is_dyn_compatible(trait_id: DefId) -> bool { + desc { |tcx| "checking if trait `{}` is dyn-compatible", tcx.def_path_str(trait_id) } } /// Gets the ParameterEnvironment for a given item; this environment diff --git a/compiler/rustc_middle/src/traits/mod.rs b/compiler/rustc_middle/src/traits/mod.rs index c3295a9ce51..caa86da8a85 100644 --- a/compiler/rustc_middle/src/traits/mod.rs +++ b/compiler/rustc_middle/src/traits/mod.rs @@ -556,8 +556,8 @@ pub enum SelectionError<'tcx> { /// (which for closures includes the "input" type params) and they /// didn't resolve. See `confirm_poly_trait_refs` for more. SignatureMismatch(Box>), - /// The trait pointed by `DefId` is not object safe. - TraitNotObjectSafe(DefId), + /// The trait pointed by `DefId` is dyn-incompatible. + TraitDynIncompatible(DefId), /// A given constant couldn't be evaluated. NotConstEvaluatable(NotConstEvaluatable), /// Exceeded the recursion depth during type projection. @@ -690,7 +690,7 @@ pub struct ImplSourceUserDefinedData<'tcx, N> { } #[derive(Clone, Debug, PartialEq, Eq, Hash, HashStable, PartialOrd, Ord)] -pub enum ObjectSafetyViolation { +pub enum DynCompatibilityViolation { /// `Self: Sized` declared on the trait. SizedSelf(SmallVec<[Span; 1]>), @@ -711,11 +711,11 @@ pub enum ObjectSafetyViolation { GAT(Symbol, Span), } -impl ObjectSafetyViolation { +impl DynCompatibilityViolation { pub fn error_msg(&self) -> Cow<'static, str> { match self { - ObjectSafetyViolation::SizedSelf(_) => "it requires `Self: Sized`".into(), - ObjectSafetyViolation::SupertraitSelf(ref spans) => { + DynCompatibilityViolation::SizedSelf(_) => "it requires `Self: Sized`".into(), + DynCompatibilityViolation::SupertraitSelf(ref spans) => { if spans.iter().any(|sp| *sp != DUMMY_SP) { "it uses `Self` as a type parameter".into() } else { @@ -723,81 +723,87 @@ impl ObjectSafetyViolation { .into() } } - ObjectSafetyViolation::SupertraitNonLifetimeBinder(_) => { + DynCompatibilityViolation::SupertraitNonLifetimeBinder(_) => { "where clause cannot reference non-lifetime `for<...>` variables".into() } - ObjectSafetyViolation::Method(name, MethodViolationCode::StaticMethod(_), _) => { + DynCompatibilityViolation::Method(name, MethodViolationCode::StaticMethod(_), _) => { format!("associated function `{name}` has no `self` parameter").into() } - ObjectSafetyViolation::Method( + DynCompatibilityViolation::Method( name, MethodViolationCode::ReferencesSelfInput(_), DUMMY_SP, ) => format!("method `{name}` references the `Self` type in its parameters").into(), - ObjectSafetyViolation::Method(name, MethodViolationCode::ReferencesSelfInput(_), _) => { - format!("method `{name}` references the `Self` type in this parameter").into() - } - ObjectSafetyViolation::Method(name, MethodViolationCode::ReferencesSelfOutput, _) => { - format!("method `{name}` references the `Self` type in its return type").into() - } - ObjectSafetyViolation::Method( + DynCompatibilityViolation::Method( + name, + MethodViolationCode::ReferencesSelfInput(_), + _, + ) => format!("method `{name}` references the `Self` type in this parameter").into(), + DynCompatibilityViolation::Method( + name, + MethodViolationCode::ReferencesSelfOutput, + _, + ) => format!("method `{name}` references the `Self` type in its return type").into(), + DynCompatibilityViolation::Method( name, MethodViolationCode::ReferencesImplTraitInTrait(_), _, ) => { format!("method `{name}` references an `impl Trait` type in its return type").into() } - ObjectSafetyViolation::Method(name, MethodViolationCode::AsyncFn, _) => { + DynCompatibilityViolation::Method(name, MethodViolationCode::AsyncFn, _) => { format!("method `{name}` is `async`").into() } - ObjectSafetyViolation::Method( + DynCompatibilityViolation::Method( name, MethodViolationCode::WhereClauseReferencesSelf, _, ) => format!("method `{name}` references the `Self` type in its `where` clause").into(), - ObjectSafetyViolation::Method(name, MethodViolationCode::Generic, _) => { + DynCompatibilityViolation::Method(name, MethodViolationCode::Generic, _) => { format!("method `{name}` has generic type parameters").into() } - ObjectSafetyViolation::Method( + DynCompatibilityViolation::Method( name, MethodViolationCode::UndispatchableReceiver(_), _, ) => format!("method `{name}`'s `self` parameter cannot be dispatched on").into(), - ObjectSafetyViolation::AssocConst(name, DUMMY_SP) => { + DynCompatibilityViolation::AssocConst(name, DUMMY_SP) => { format!("it contains associated `const` `{name}`").into() } - ObjectSafetyViolation::AssocConst(..) => "it contains this associated `const`".into(), - ObjectSafetyViolation::GAT(name, _) => { + DynCompatibilityViolation::AssocConst(..) => { + "it contains this associated `const`".into() + } + DynCompatibilityViolation::GAT(name, _) => { format!("it contains the generic associated type `{name}`").into() } } } - pub fn solution(&self) -> ObjectSafetyViolationSolution { + pub fn solution(&self) -> DynCompatibilityViolationSolution { match self { - ObjectSafetyViolation::SizedSelf(_) - | ObjectSafetyViolation::SupertraitSelf(_) - | ObjectSafetyViolation::SupertraitNonLifetimeBinder(..) => { - ObjectSafetyViolationSolution::None + DynCompatibilityViolation::SizedSelf(_) + | DynCompatibilityViolation::SupertraitSelf(_) + | DynCompatibilityViolation::SupertraitNonLifetimeBinder(..) => { + DynCompatibilityViolationSolution::None } - ObjectSafetyViolation::Method( + DynCompatibilityViolation::Method( name, MethodViolationCode::StaticMethod(Some((add_self_sugg, make_sized_sugg))), _, - ) => ObjectSafetyViolationSolution::AddSelfOrMakeSized { + ) => DynCompatibilityViolationSolution::AddSelfOrMakeSized { name: *name, add_self_sugg: add_self_sugg.clone(), make_sized_sugg: make_sized_sugg.clone(), }, - ObjectSafetyViolation::Method( + DynCompatibilityViolation::Method( name, MethodViolationCode::UndispatchableReceiver(Some(span)), _, - ) => ObjectSafetyViolationSolution::ChangeToRefSelf(*name, *span), - ObjectSafetyViolation::AssocConst(name, _) - | ObjectSafetyViolation::GAT(name, _) - | ObjectSafetyViolation::Method(name, ..) => { - ObjectSafetyViolationSolution::MoveToAnotherTrait(*name) + ) => DynCompatibilityViolationSolution::ChangeToRefSelf(*name, *span), + DynCompatibilityViolation::AssocConst(name, _) + | DynCompatibilityViolation::GAT(name, _) + | DynCompatibilityViolation::Method(name, ..) => { + DynCompatibilityViolationSolution::MoveToAnotherTrait(*name) } } } @@ -806,12 +812,12 @@ impl ObjectSafetyViolation { // When `span` comes from a separate crate, it'll be `DUMMY_SP`. Treat it as `None` so // diagnostics use a `note` instead of a `span_label`. match self { - ObjectSafetyViolation::SupertraitSelf(spans) - | ObjectSafetyViolation::SizedSelf(spans) - | ObjectSafetyViolation::SupertraitNonLifetimeBinder(spans) => spans.clone(), - ObjectSafetyViolation::AssocConst(_, span) - | ObjectSafetyViolation::GAT(_, span) - | ObjectSafetyViolation::Method(_, _, span) + DynCompatibilityViolation::SupertraitSelf(spans) + | DynCompatibilityViolation::SizedSelf(spans) + | DynCompatibilityViolation::SupertraitNonLifetimeBinder(spans) => spans.clone(), + DynCompatibilityViolation::AssocConst(_, span) + | DynCompatibilityViolation::GAT(_, span) + | DynCompatibilityViolation::Method(_, _, span) if *span != DUMMY_SP => { smallvec![*span] @@ -822,7 +828,7 @@ impl ObjectSafetyViolation { } #[derive(Clone, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)] -pub enum ObjectSafetyViolationSolution { +pub enum DynCompatibilityViolationSolution { None, AddSelfOrMakeSized { name: Symbol, @@ -833,11 +839,11 @@ pub enum ObjectSafetyViolationSolution { MoveToAnotherTrait(Symbol), } -impl ObjectSafetyViolationSolution { +impl DynCompatibilityViolationSolution { pub fn add_to(self, err: &mut Diag<'_, G>) { match self { - ObjectSafetyViolationSolution::None => {} - ObjectSafetyViolationSolution::AddSelfOrMakeSized { + DynCompatibilityViolationSolution::None => {} + DynCompatibilityViolationSolution::AddSelfOrMakeSized { name, add_self_sugg, make_sized_sugg, @@ -860,7 +866,7 @@ impl ObjectSafetyViolationSolution { Applicability::MaybeIncorrect, ); } - ObjectSafetyViolationSolution::ChangeToRefSelf(name, span) => { + DynCompatibilityViolationSolution::ChangeToRefSelf(name, span) => { err.span_suggestion( span, format!("consider changing method `{name}`'s `self` parameter to be `&self`"), @@ -868,14 +874,14 @@ impl ObjectSafetyViolationSolution { Applicability::MachineApplicable, ); } - ObjectSafetyViolationSolution::MoveToAnotherTrait(name) => { + DynCompatibilityViolationSolution::MoveToAnotherTrait(name) => { err.help(format!("consider moving `{name}` to another trait")); } } } } -/// Reasons a method might not be object-safe. +/// Reasons a method might not be dyn-compatible. #[derive(Clone, Debug, PartialEq, Eq, Hash, HashStable, PartialOrd, Ord)] pub enum MethodViolationCode { /// e.g., `fn foo()` diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs index f017216489d..df60950a6b2 100644 --- a/compiler/rustc_middle/src/ty/context.rs +++ b/compiler/rustc_middle/src/ty/context.rs @@ -527,8 +527,8 @@ impl<'tcx> Interner for TyCtxt<'tcx> { self.trait_is_alias(trait_def_id) } - fn trait_is_object_safe(self, trait_def_id: DefId) -> bool { - self.is_object_safe(trait_def_id) + fn trait_is_dyn_compatible(self, trait_def_id: DefId) -> bool { + self.is_dyn_compatible(trait_def_id) } fn trait_is_fundamental(self, def_id: DefId) -> bool { diff --git a/compiler/rustc_middle/src/ty/flags.rs b/compiler/rustc_middle/src/ty/flags.rs index fc079592583..92a975c028e 100644 --- a/compiler/rustc_middle/src/ty/flags.rs +++ b/compiler/rustc_middle/src/ty/flags.rs @@ -301,7 +301,7 @@ impl FlagComputation { ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(arg)) => { self.add_args(slice::from_ref(&arg)); } - ty::PredicateKind::ObjectSafe(_def_id) => {} + ty::PredicateKind::DynCompatible(_def_id) => {} ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(uv)) => { self.add_const(uv); } diff --git a/compiler/rustc_middle/src/ty/instance.rs b/compiler/rustc_middle/src/ty/instance.rs index bfef4c4c8c6..b1c5ff50fdc 100644 --- a/compiler/rustc_middle/src/ty/instance.rs +++ b/compiler/rustc_middle/src/ty/instance.rs @@ -50,7 +50,7 @@ pub enum ReifyReason { /// * A vtable entry is directly converted to a function call (e.g. creating a fn ptr from a /// method on a `dyn` object). /// * A function with `#[track_caller]` is converted to a function pointer - /// * If KCFI is enabled, creating a function pointer from a method on an object-safe trait. + /// * If KCFI is enabled, creating a function pointer from a method on a dyn-compatible trait. /// This includes the case of converting `::call`-like methods on closure-likes to function /// pointers. FnPtr, diff --git a/compiler/rustc_middle/src/ty/predicate.rs b/compiler/rustc_middle/src/ty/predicate.rs index 534a8c99c5a..fd4e8f1cd4e 100644 --- a/compiler/rustc_middle/src/ty/predicate.rs +++ b/compiler/rustc_middle/src/ty/predicate.rs @@ -36,7 +36,7 @@ pub type PolyProjectionPredicate<'tcx> = ty::Binder<'tcx, ProjectionPredicate<'t /// A statement that can be proven by a trait solver. This includes things that may /// show up in where clauses, such as trait predicates and projection predicates, -/// and also things that are emitted as part of type checking such as `ObjectSafe` +/// and also things that are emitted as part of type checking such as `DynCompatible` /// predicate which is emitted when a type is coerced to a trait object. /// /// Use this rather than `PredicateKind`, whenever possible. @@ -147,7 +147,7 @@ impl<'tcx> Predicate<'tcx> { | PredicateKind::Clause(ClauseKind::TypeOutlives(_)) | PredicateKind::Clause(ClauseKind::Projection(_)) | PredicateKind::Clause(ClauseKind::ConstArgHasType(..)) - | PredicateKind::ObjectSafe(_) + | PredicateKind::DynCompatible(_) | PredicateKind::Subtype(_) | PredicateKind::Coerce(_) | PredicateKind::Clause(ClauseKind::ConstEvaluatable(_)) @@ -647,7 +647,7 @@ impl<'tcx> Predicate<'tcx> { | PredicateKind::Coerce(..) | PredicateKind::Clause(ClauseKind::RegionOutlives(..)) | PredicateKind::Clause(ClauseKind::WellFormed(..)) - | PredicateKind::ObjectSafe(..) + | PredicateKind::DynCompatible(..) | PredicateKind::Clause(ClauseKind::TypeOutlives(..)) | PredicateKind::Clause(ClauseKind::ConstEvaluatable(..)) | PredicateKind::ConstEquate(..) @@ -667,7 +667,7 @@ impl<'tcx> Predicate<'tcx> { | PredicateKind::Coerce(..) | PredicateKind::Clause(ClauseKind::RegionOutlives(..)) | PredicateKind::Clause(ClauseKind::WellFormed(..)) - | PredicateKind::ObjectSafe(..) + | PredicateKind::DynCompatible(..) | PredicateKind::Clause(ClauseKind::TypeOutlives(..)) | PredicateKind::Clause(ClauseKind::ConstEvaluatable(..)) | PredicateKind::ConstEquate(..) diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs index 5b4ee2791f8..8fd4c30457f 100644 --- a/compiler/rustc_middle/src/ty/print/pretty.rs +++ b/compiler/rustc_middle/src/ty/print/pretty.rs @@ -3088,8 +3088,8 @@ define_print! { } ty::PredicateKind::Subtype(predicate) => p!(print(predicate)), ty::PredicateKind::Coerce(predicate) => p!(print(predicate)), - ty::PredicateKind::ObjectSafe(trait_def_id) => { - p!("the trait `", print_def_path(trait_def_id, &[]), "` is object-safe") + ty::PredicateKind::DynCompatible(trait_def_id) => { + p!("the trait `", print_def_path(trait_def_id, &[]), "` is dyn-compatible") } ty::PredicateKind::ConstEquate(c1, c2) => { p!("the constant `", print(c1), "` equals `", print(c2), "`") diff --git a/compiler/rustc_middle/src/ty/util.rs b/compiler/rustc_middle/src/ty/util.rs index 321b51289fb..0a917120b3b 100644 --- a/compiler/rustc_middle/src/ty/util.rs +++ b/compiler/rustc_middle/src/ty/util.rs @@ -1602,7 +1602,7 @@ impl<'tcx> ExplicitSelf<'tcx> { /// `Other`. /// This is mainly used to require the arbitrary_self_types feature /// in the case of `Other`, to improve error messages in the common cases, - /// and to make `Other` non-object-safe. + /// and to make `Other` dyn-incompatible. /// /// Examples: /// diff --git a/compiler/rustc_monomorphize/src/collector.rs b/compiler/rustc_monomorphize/src/collector.rs index 0cdd237dc00..d21bbce2ae2 100644 --- a/compiler/rustc_monomorphize/src/collector.rs +++ b/compiler/rustc_monomorphize/src/collector.rs @@ -120,7 +120,7 @@ //! #### Unsizing Casts //! A subtle way of introducing use edges is by casting to a trait object. //! Since the resulting fat-pointer contains a reference to a vtable, we need to -//! instantiate all object-safe methods of the trait, as we need to store +//! instantiate all dyn-compatible methods of the trait, as we need to store //! pointers to these functions even if they never get called anywhere. This can //! be seen as a special case of taking a function reference. //! diff --git a/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs b/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs index 520afbeb645..cebeef76bfc 100644 --- a/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs +++ b/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs @@ -639,8 +639,8 @@ where ty::Dynamic(bounds, ..) => bounds, }; - // Do not consider built-in object impls for non-object-safe types. - if bounds.principal_def_id().is_some_and(|def_id| !cx.trait_is_object_safe(def_id)) { + // Do not consider built-in object impls for dyn-incompatible types. + if bounds.principal_def_id().is_some_and(|def_id| !cx.trait_is_dyn_compatible(def_id)) { return; } diff --git a/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs b/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs index 12ad0724b5c..270d50b5af4 100644 --- a/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs +++ b/compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs @@ -423,8 +423,8 @@ where ty::PredicateKind::Coerce(predicate) => { self.compute_coerce_goal(Goal { param_env, predicate }) } - ty::PredicateKind::ObjectSafe(trait_def_id) => { - self.compute_object_safe_goal(trait_def_id) + ty::PredicateKind::DynCompatible(trait_def_id) => { + self.compute_dyn_compatible_goal(trait_def_id) } ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(arg)) => { self.compute_well_formed_goal(Goal { param_env, predicate: arg }) diff --git a/compiler/rustc_next_trait_solver/src/solve/mod.rs b/compiler/rustc_next_trait_solver/src/solve/mod.rs index 536b502136a..309ab7f28d1 100644 --- a/compiler/rustc_next_trait_solver/src/solve/mod.rs +++ b/compiler/rustc_next_trait_solver/src/solve/mod.rs @@ -111,8 +111,8 @@ where } } - fn compute_object_safe_goal(&mut self, trait_def_id: I::DefId) -> QueryResult { - if self.cx().trait_is_object_safe(trait_def_id) { + fn compute_dyn_compatible_goal(&mut self, trait_def_id: I::DefId) -> QueryResult { + if self.cx().trait_is_dyn_compatible(trait_def_id) { self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes) } else { Err(NoSolution) diff --git a/compiler/rustc_next_trait_solver/src/solve/trait_goals.rs b/compiler/rustc_next_trait_solver/src/solve/trait_goals.rs index 781ca127e15..703e88d1339 100644 --- a/compiler/rustc_next_trait_solver/src/solve/trait_goals.rs +++ b/compiler/rustc_next_trait_solver/src/solve/trait_goals.rs @@ -832,8 +832,8 @@ where let cx = self.cx(); let Goal { predicate: (a_ty, _), .. } = goal; - // Can only unsize to an object-safe trait. - if b_data.principal_def_id().is_some_and(|def_id| !cx.trait_is_object_safe(def_id)) { + // Can only unsize to an dyn-compatible trait. + if b_data.principal_def_id().is_some_and(|def_id| !cx.trait_is_dyn_compatible(def_id)) { return Err(NoSolution); } diff --git a/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs b/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs index 80a9ba79c28..5f7184a4240 100644 --- a/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs +++ b/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs @@ -475,7 +475,7 @@ fn implemented_method<'tcx>( } else { return None; }; - let vtable_possible = - traits::is_vtable_safe_method(tcx, trait_id, trait_method) && tcx.is_object_safe(trait_id); + let vtable_possible = traits::is_vtable_safe_method(tcx, trait_id, trait_method) + && tcx.is_dyn_compatible(trait_id); vtable_possible.then_some((trait_ref, method_id, ancestor)) } diff --git a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs index e54ab1f7e24..271f46ea943 100644 --- a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs +++ b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs @@ -632,8 +632,8 @@ impl<'tcx> Stable<'tcx> for ty::PredicateKind<'tcx> { PredicateKind::Clause(clause_kind) => { stable_mir::ty::PredicateKind::Clause(clause_kind.stable(tables)) } - PredicateKind::ObjectSafe(did) => { - stable_mir::ty::PredicateKind::ObjectSafe(tables.trait_def(*did)) + PredicateKind::DynCompatible(did) => { + stable_mir::ty::PredicateKind::DynCompatible(tables.trait_def(*did)) } PredicateKind::Subtype(subtype_predicate) => { stable_mir::ty::PredicateKind::SubType(subtype_predicate.stable(tables)) diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs index 19e2679ae4d..b3a913c4c5b 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs @@ -37,7 +37,7 @@ use super::{ }; use crate::error_reporting::TypeErrCtxt; use crate::error_reporting::infer::TyCategory; -use crate::error_reporting::traits::report_object_safety_error; +use crate::error_reporting::traits::report_dyn_incompatibility; use crate::errors::{ AsyncClosureNotFn, ClosureFnMutLabel, ClosureFnOnceLabel, ClosureKindMismatch, }; @@ -46,7 +46,7 @@ use crate::traits::query::evaluate_obligation::InferCtxtExt as _; use crate::traits::{ MismatchedProjectionTypes, NormalizeExt, Obligation, ObligationCause, ObligationCauseCode, ObligationCtxt, Overflow, PredicateObligation, SelectionError, SignatureMismatch, - TraitNotObjectSafe, elaborate, + TraitDynIncompatible, elaborate, }; impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { @@ -547,9 +547,9 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { ) } - ty::PredicateKind::ObjectSafe(trait_def_id) => { - let violations = self.tcx.object_safety_violations(trait_def_id); - report_object_safety_error(self.tcx, span, None, trait_def_id, violations) + ty::PredicateKind::DynCompatible(trait_def_id) => { + let violations = self.tcx.dyn_compatibility_violations(trait_def_id); + report_dyn_incompatibility(self.tcx, span, None, trait_def_id, violations) } ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(ty)) => { @@ -624,9 +624,9 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { def_id, ), - TraitNotObjectSafe(did) => { - let violations = self.tcx.object_safety_violations(did); - report_object_safety_error(self.tcx, span, None, did, violations) + TraitDynIncompatible(did) => { + let violations = self.tcx.dyn_compatibility_violations(did); + report_dyn_incompatibility(self.tcx, span, None, did, violations) } SelectionError::NotConstEvaluatable(NotConstEvaluatable::MentionsInfer) => { diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs index b229499a9f4..109bae10b54 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/traits/mod.rs @@ -12,8 +12,8 @@ use rustc_hir::def_id::{DefId, LocalDefId}; use rustc_hir::intravisit::Visitor; use rustc_hir::{self as hir, LangItem}; use rustc_infer::traits::{ - ObjectSafetyViolation, Obligation, ObligationCause, ObligationCauseCode, PredicateObligation, - SelectionError, + DynCompatibilityViolation, Obligation, ObligationCause, ObligationCauseCode, + PredicateObligation, SelectionError, }; use rustc_middle::ty::print::{PrintTraitRefExt as _, with_no_trimmed_paths}; use rustc_middle::ty::{self, Ty, TyCtxt}; @@ -406,12 +406,12 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { } } -pub fn report_object_safety_error<'tcx>( +pub fn report_dyn_incompatibility<'tcx>( tcx: TyCtxt<'tcx>, span: Span, hir_id: Option, trait_def_id: DefId, - violations: &[ObjectSafetyViolation], + violations: &[DynCompatibilityViolation], ) -> Diag<'tcx> { let trait_str = tcx.def_path_str(trait_def_id); let trait_span = tcx.hir().get_if_local(trait_def_id).and_then(|node| match node { @@ -449,12 +449,12 @@ pub fn report_object_safety_error<'tcx>( let mut multi_span = vec![]; let mut messages = vec![]; for violation in violations { - if let ObjectSafetyViolation::SizedSelf(sp) = &violation + if let DynCompatibilityViolation::SizedSelf(sp) = &violation && !sp.is_empty() { // Do not report `SizedSelf` without spans pointing at `SizedSelf` obligations // with a `Span`. - reported_violations.insert(ObjectSafetyViolation::SizedSelf(vec![].into())); + reported_violations.insert(DynCompatibilityViolation::SizedSelf(vec![].into())); } if reported_violations.insert(violation.clone()) { let spans = violation.spans(); @@ -481,9 +481,10 @@ pub fn report_object_safety_error<'tcx>( for (span, msg) in iter::zip(multi_span, messages) { note_span.push_span_label(span, msg); } + // FIXME(dyn_compat_renaming): Update the URL. err.span_note( note_span, - "for a trait to be \"object safe\" it needs to allow building a vtable to allow the call \ + "for a trait to be \"dyn-compatible\" it needs to allow building a vtable to allow the call \ to be resolvable dynamically; for more information visit \ ", ); diff --git a/compiler/rustc_trait_selection/src/solve/fulfill.rs b/compiler/rustc_trait_selection/src/solve/fulfill.rs index fc15f5b5906..c6e3ba3c957 100644 --- a/compiler/rustc_trait_selection/src/solve/fulfill.rs +++ b/compiler/rustc_trait_selection/src/solve/fulfill.rs @@ -275,7 +275,7 @@ fn fulfillment_error_for_no_solution<'tcx>( FulfillmentErrorCode::Subtype(expected_found, TypeError::Sorts(expected_found)) } ty::PredicateKind::Clause(_) - | ty::PredicateKind::ObjectSafe(_) + | ty::PredicateKind::DynCompatible(_) | ty::PredicateKind::Ambiguous => { FulfillmentErrorCode::Select(SelectionError::Unimplemented) } diff --git a/compiler/rustc_trait_selection/src/traits/auto_trait.rs b/compiler/rustc_trait_selection/src/traits/auto_trait.rs index f68e0583307..12aeee0d02f 100644 --- a/compiler/rustc_trait_selection/src/traits/auto_trait.rs +++ b/compiler/rustc_trait_selection/src/traits/auto_trait.rs @@ -802,7 +802,7 @@ impl<'tcx> AutoTraitFinder<'tcx> { | ty::PredicateKind::Clause(ty::ClauseKind::ConstArgHasType(..)) | ty::PredicateKind::NormalizesTo(..) | ty::PredicateKind::AliasRelate(..) - | ty::PredicateKind::ObjectSafe(..) + | ty::PredicateKind::DynCompatible(..) | ty::PredicateKind::Subtype(..) // FIXME(generic_const_exprs): you can absolutely add this as a where clauses | ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..)) diff --git a/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs b/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs new file mode 100644 index 00000000000..d5d7681a8d6 --- /dev/null +++ b/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs @@ -0,0 +1,936 @@ +//! "Object safety" refers to the ability for a trait to be converted +//! to an object. In general, traits may only be converted to an +//! object if all of their methods meet certain criteria. In particular, +//! they must: +//! +//! - have a suitable receiver from which we can extract a vtable and coerce to a "thin" version +//! that doesn't contain the vtable; +//! - not reference the erased type `Self` except for in this receiver; +//! - not have generic type parameters. + +use std::iter; +use std::ops::ControlFlow; + +use rustc_errors::FatalError; +use rustc_hir as hir; +use rustc_hir::def_id::DefId; +use rustc_middle::query::Providers; +use rustc_middle::ty::{ + self, EarlyBinder, ExistentialPredicateStableCmpExt as _, GenericArgs, Ty, TyCtxt, + TypeFoldable, TypeFolder, TypeSuperFoldable, TypeSuperVisitable, TypeVisitable, + TypeVisitableExt, TypeVisitor, Upcast, +}; +use rustc_span::Span; +use rustc_span::symbol::Symbol; +use rustc_target::abi::Abi; +use smallvec::SmallVec; +use tracing::{debug, instrument}; + +use super::elaborate; +use crate::infer::TyCtxtInferExt; +pub use crate::traits::DynCompatibilityViolation; +use crate::traits::query::evaluate_obligation::InferCtxtExt; +use crate::traits::{MethodViolationCode, Obligation, ObligationCause, util}; + +/// Returns the dyn-compatibility violations that affect HIR ty lowering. +/// +/// Currently that is `Self` in supertraits. This is needed +/// because `dyn_compatibility_violations` can't be used during +/// type collection. +#[instrument(level = "debug", skip(tcx), ret)] +pub fn hir_ty_lowering_dyn_compatibility_violations( + tcx: TyCtxt<'_>, + trait_def_id: DefId, +) -> Vec { + debug_assert!(tcx.generics_of(trait_def_id).has_self); + tcx.supertrait_def_ids(trait_def_id) + .map(|def_id| predicates_reference_self(tcx, def_id, true)) + .filter(|spans| !spans.is_empty()) + .map(DynCompatibilityViolation::SupertraitSelf) + .collect() +} + +fn dyn_compatibility_violations( + tcx: TyCtxt<'_>, + trait_def_id: DefId, +) -> &'_ [DynCompatibilityViolation] { + debug_assert!(tcx.generics_of(trait_def_id).has_self); + debug!("dyn_compatibility_violations: {:?}", trait_def_id); + + tcx.arena.alloc_from_iter( + tcx.supertrait_def_ids(trait_def_id) + .flat_map(|def_id| dyn_compatibility_violations_for_trait(tcx, def_id)), + ) +} + +fn is_dyn_compatible(tcx: TyCtxt<'_>, trait_def_id: DefId) -> bool { + tcx.dyn_compatibility_violations(trait_def_id).is_empty() +} + +/// We say a method is *vtable safe* if it can be invoked on a trait +/// object. Note that object-safe traits can have some +/// non-vtable-safe methods, so long as they require `Self: Sized` or +/// otherwise ensure that they cannot be used when `Self = Trait`. +pub fn is_vtable_safe_method(tcx: TyCtxt<'_>, trait_def_id: DefId, method: ty::AssocItem) -> bool { + debug_assert!(tcx.generics_of(trait_def_id).has_self); + debug!("is_vtable_safe_method({:?}, {:?})", trait_def_id, method); + // Any method that has a `Self: Sized` bound cannot be called. + if tcx.generics_require_sized_self(method.def_id) { + return false; + } + + virtual_call_violations_for_method(tcx, trait_def_id, method).is_empty() +} + +#[instrument(level = "debug", skip(tcx), ret)] +fn dyn_compatibility_violations_for_trait( + tcx: TyCtxt<'_>, + trait_def_id: DefId, +) -> Vec { + // Check assoc items for violations. + let mut violations: Vec<_> = tcx + .associated_items(trait_def_id) + .in_definition_order() + .flat_map(|&item| dyn_compatibility_violations_for_assoc_item(tcx, trait_def_id, item)) + .collect(); + + // Check the trait itself. + if trait_has_sized_self(tcx, trait_def_id) { + // We don't want to include the requirement from `Sized` itself to be `Sized` in the list. + let spans = get_sized_bounds(tcx, trait_def_id); + violations.push(DynCompatibilityViolation::SizedSelf(spans)); + } + let spans = predicates_reference_self(tcx, trait_def_id, false); + if !spans.is_empty() { + violations.push(DynCompatibilityViolation::SupertraitSelf(spans)); + } + let spans = bounds_reference_self(tcx, trait_def_id); + if !spans.is_empty() { + violations.push(DynCompatibilityViolation::SupertraitSelf(spans)); + } + let spans = super_predicates_have_non_lifetime_binders(tcx, trait_def_id); + if !spans.is_empty() { + violations.push(DynCompatibilityViolation::SupertraitNonLifetimeBinder(spans)); + } + + if violations.is_empty() { + for item in tcx.associated_items(trait_def_id).in_definition_order() { + if let ty::AssocKind::Fn = item.kind { + check_receiver_correct(tcx, trait_def_id, *item); + } + } + } + + violations +} + +fn sized_trait_bound_spans<'tcx>( + tcx: TyCtxt<'tcx>, + bounds: hir::GenericBounds<'tcx>, +) -> impl 'tcx + Iterator { + bounds.iter().filter_map(move |b| match b { + hir::GenericBound::Trait(trait_ref, hir::TraitBoundModifier::None) + if trait_has_sized_self( + tcx, + trait_ref.trait_ref.trait_def_id().unwrap_or_else(|| FatalError.raise()), + ) => + { + // Fetch spans for supertraits that are `Sized`: `trait T: Super` + Some(trait_ref.span) + } + _ => None, + }) +} + +fn get_sized_bounds(tcx: TyCtxt<'_>, trait_def_id: DefId) -> SmallVec<[Span; 1]> { + tcx.hir() + .get_if_local(trait_def_id) + .and_then(|node| match node { + hir::Node::Item(hir::Item { + kind: hir::ItemKind::Trait(.., generics, bounds, _), + .. + }) => Some( + generics + .predicates + .iter() + .filter_map(|pred| { + match pred { + hir::WherePredicate::BoundPredicate(pred) + if pred.bounded_ty.hir_id.owner.to_def_id() == trait_def_id => + { + // Fetch spans for trait bounds that are Sized: + // `trait T where Self: Pred` + Some(sized_trait_bound_spans(tcx, pred.bounds)) + } + _ => None, + } + }) + .flatten() + // Fetch spans for supertraits that are `Sized`: `trait T: Super`. + .chain(sized_trait_bound_spans(tcx, bounds)) + .collect::>(), + ), + _ => None, + }) + .unwrap_or_else(SmallVec::new) +} + +fn predicates_reference_self( + tcx: TyCtxt<'_>, + trait_def_id: DefId, + supertraits_only: bool, +) -> SmallVec<[Span; 1]> { + let trait_ref = ty::Binder::dummy(ty::TraitRef::identity(tcx, trait_def_id)); + let predicates = if supertraits_only { + tcx.explicit_super_predicates_of(trait_def_id).skip_binder() + } else { + tcx.predicates_of(trait_def_id).predicates + }; + predicates + .iter() + .map(|&(predicate, sp)| (predicate.instantiate_supertrait(tcx, trait_ref), sp)) + .filter_map(|(clause, sp)| { + // Super predicates cannot allow self projections, since they're + // impossible to make into existential bounds without eager resolution + // or something. + // e.g. `trait A: B`. + predicate_references_self(tcx, trait_def_id, clause, sp, AllowSelfProjections::No) + }) + .collect() +} + +fn bounds_reference_self(tcx: TyCtxt<'_>, trait_def_id: DefId) -> SmallVec<[Span; 1]> { + tcx.associated_items(trait_def_id) + .in_definition_order() + .filter(|item| item.kind == ty::AssocKind::Type) + .flat_map(|item| tcx.explicit_item_bounds(item.def_id).iter_identity_copied()) + .filter_map(|(clause, sp)| { + // Item bounds *can* have self projections, since they never get + // their self type erased. + predicate_references_self(tcx, trait_def_id, clause, sp, AllowSelfProjections::Yes) + }) + .collect() +} + +fn predicate_references_self<'tcx>( + tcx: TyCtxt<'tcx>, + trait_def_id: DefId, + predicate: ty::Clause<'tcx>, + sp: Span, + allow_self_projections: AllowSelfProjections, +) -> Option { + match predicate.kind().skip_binder() { + ty::ClauseKind::Trait(ref data) => { + // In the case of a trait predicate, we can skip the "self" type. + data.trait_ref.args[1..].iter().any(|&arg| contains_illegal_self_type_reference(tcx, trait_def_id, arg, allow_self_projections)).then_some(sp) + } + ty::ClauseKind::Projection(ref data) => { + // And similarly for projections. This should be redundant with + // the previous check because any projection should have a + // matching `Trait` predicate with the same inputs, but we do + // the check to be safe. + // + // It's also won't be redundant if we allow type-generic associated + // types for trait objects. + // + // Note that we *do* allow projection *outputs* to contain + // `self` (i.e., `trait Foo: Bar { type Result; }`), + // we just require the user to specify *both* outputs + // in the object type (i.e., `dyn Foo`). + // + // This is ALT2 in issue #56288, see that for discussion of the + // possible alternatives. + data.projection_term.args[1..].iter().any(|&arg| contains_illegal_self_type_reference(tcx, trait_def_id, arg, allow_self_projections)).then_some(sp) + } + ty::ClauseKind::ConstArgHasType(_ct, ty) => contains_illegal_self_type_reference(tcx, trait_def_id, ty, allow_self_projections).then_some(sp), + + ty::ClauseKind::WellFormed(..) + | ty::ClauseKind::TypeOutlives(..) + | ty::ClauseKind::RegionOutlives(..) + // FIXME(generic_const_exprs): this can mention `Self` + | ty::ClauseKind::ConstEvaluatable(..) + => None, + } +} + +fn super_predicates_have_non_lifetime_binders( + tcx: TyCtxt<'_>, + trait_def_id: DefId, +) -> SmallVec<[Span; 1]> { + // If non_lifetime_binders is disabled, then exit early + if !tcx.features().non_lifetime_binders { + return SmallVec::new(); + } + tcx.explicit_super_predicates_of(trait_def_id) + .iter_identity_copied() + .filter_map(|(pred, span)| pred.has_non_region_bound_vars().then_some(span)) + .collect() +} + +fn trait_has_sized_self(tcx: TyCtxt<'_>, trait_def_id: DefId) -> bool { + tcx.generics_require_sized_self(trait_def_id) +} + +fn generics_require_sized_self(tcx: TyCtxt<'_>, def_id: DefId) -> bool { + let Some(sized_def_id) = tcx.lang_items().sized_trait() else { + return false; /* No Sized trait, can't require it! */ + }; + + // Search for a predicate like `Self : Sized` amongst the trait bounds. + let predicates = tcx.predicates_of(def_id); + let predicates = predicates.instantiate_identity(tcx).predicates; + elaborate(tcx, predicates).any(|pred| match pred.kind().skip_binder() { + ty::ClauseKind::Trait(ref trait_pred) => { + trait_pred.def_id() == sized_def_id && trait_pred.self_ty().is_param(0) + } + ty::ClauseKind::RegionOutlives(_) + | ty::ClauseKind::TypeOutlives(_) + | ty::ClauseKind::Projection(_) + | ty::ClauseKind::ConstArgHasType(_, _) + | ty::ClauseKind::WellFormed(_) + | ty::ClauseKind::ConstEvaluatable(_) => false, + }) +} + +/// Returns `Some(_)` if this item makes the containing trait dyn-incompatible. +#[instrument(level = "debug", skip(tcx), ret)] +pub fn dyn_compatibility_violations_for_assoc_item( + tcx: TyCtxt<'_>, + trait_def_id: DefId, + item: ty::AssocItem, +) -> Vec { + // Any item that has a `Self : Sized` requisite is otherwise + // exempt from the regulations. + if tcx.generics_require_sized_self(item.def_id) { + return Vec::new(); + } + + match item.kind { + // Associated consts are never dyn-compatible, as they can't have `where` bounds yet at all, + // and associated const bounds in trait objects aren't a thing yet either. + ty::AssocKind::Const => { + vec![DynCompatibilityViolation::AssocConst(item.name, item.ident(tcx).span)] + } + ty::AssocKind::Fn => virtual_call_violations_for_method(tcx, trait_def_id, item) + .into_iter() + .map(|v| { + let node = tcx.hir().get_if_local(item.def_id); + // Get an accurate span depending on the violation. + let span = match (&v, node) { + (MethodViolationCode::ReferencesSelfInput(Some(span)), _) => *span, + (MethodViolationCode::UndispatchableReceiver(Some(span)), _) => *span, + (MethodViolationCode::ReferencesImplTraitInTrait(span), _) => *span, + (MethodViolationCode::ReferencesSelfOutput, Some(node)) => { + node.fn_decl().map_or(item.ident(tcx).span, |decl| decl.output.span()) + } + _ => item.ident(tcx).span, + }; + + DynCompatibilityViolation::Method(item.name, v, span) + }) + .collect(), + // Associated types can only be dyn-compatible if they have `Self: Sized` bounds. + ty::AssocKind::Type => { + if !tcx.features().generic_associated_types_extended + && !tcx.generics_of(item.def_id).is_own_empty() + && !item.is_impl_trait_in_trait() + { + vec![DynCompatibilityViolation::GAT(item.name, item.ident(tcx).span)] + } else { + // We will permit associated types if they are explicitly mentioned in the trait object. + // We can't check this here, as here we only check if it is guaranteed to not be possible. + Vec::new() + } + } + } +} + +/// Returns `Some(_)` if this method cannot be called on a trait +/// object; this does not necessarily imply that the enclosing trait +/// is dyn-incompatible, because the method might have a where clause +/// `Self: Sized`. +fn virtual_call_violations_for_method<'tcx>( + tcx: TyCtxt<'tcx>, + trait_def_id: DefId, + method: ty::AssocItem, +) -> Vec { + let sig = tcx.fn_sig(method.def_id).instantiate_identity(); + + // The method's first parameter must be named `self` + if !method.fn_has_self_parameter { + let sugg = if let Some(hir::Node::TraitItem(hir::TraitItem { + generics, + kind: hir::TraitItemKind::Fn(sig, _), + .. + })) = tcx.hir().get_if_local(method.def_id).as_ref() + { + let sm = tcx.sess.source_map(); + Some(( + ( + format!("&self{}", if sig.decl.inputs.is_empty() { "" } else { ", " }), + sm.span_through_char(sig.span, '(').shrink_to_hi(), + ), + ( + format!("{} Self: Sized", generics.add_where_or_trailing_comma()), + generics.tail_span_for_predicate_suggestion(), + ), + )) + } else { + None + }; + + // Not having `self` parameter messes up the later checks, + // so we need to return instead of pushing + return vec![MethodViolationCode::StaticMethod(sugg)]; + } + + let mut errors = Vec::new(); + + for (i, &input_ty) in sig.skip_binder().inputs().iter().enumerate().skip(1) { + if contains_illegal_self_type_reference( + tcx, + trait_def_id, + sig.rebind(input_ty), + AllowSelfProjections::Yes, + ) { + let span = if let Some(hir::Node::TraitItem(hir::TraitItem { + kind: hir::TraitItemKind::Fn(sig, _), + .. + })) = tcx.hir().get_if_local(method.def_id).as_ref() + { + Some(sig.decl.inputs[i].span) + } else { + None + }; + errors.push(MethodViolationCode::ReferencesSelfInput(span)); + } + } + if contains_illegal_self_type_reference( + tcx, + trait_def_id, + sig.output(), + AllowSelfProjections::Yes, + ) { + errors.push(MethodViolationCode::ReferencesSelfOutput); + } + if let Some(code) = contains_illegal_impl_trait_in_trait(tcx, method.def_id, sig.output()) { + errors.push(code); + } + + // We can't monomorphize things like `fn foo(...)`. + let own_counts = tcx.generics_of(method.def_id).own_counts(); + if own_counts.types > 0 || own_counts.consts > 0 { + errors.push(MethodViolationCode::Generic); + } + + let receiver_ty = tcx.liberate_late_bound_regions(method.def_id, sig.input(0)); + + // Until `unsized_locals` is fully implemented, `self: Self` can't be dispatched on. + // However, this is already considered object-safe. We allow it as a special case here. + // FIXME(mikeyhew) get rid of this `if` statement once `receiver_is_dispatchable` allows + // `Receiver: Unsize dyn Trait]>`. + if receiver_ty != tcx.types.self_param { + if !receiver_is_dispatchable(tcx, method, receiver_ty) { + let span = if let Some(hir::Node::TraitItem(hir::TraitItem { + kind: hir::TraitItemKind::Fn(sig, _), + .. + })) = tcx.hir().get_if_local(method.def_id).as_ref() + { + Some(sig.decl.inputs[0].span) + } else { + None + }; + errors.push(MethodViolationCode::UndispatchableReceiver(span)); + } else { + // We confirm that the `receiver_is_dispatchable` is accurate later, + // see `check_receiver_correct`. It should be kept in sync with this code. + } + } + + // NOTE: This check happens last, because it results in a lint, and not a + // hard error. + if tcx.predicates_of(method.def_id).predicates.iter().any(|&(pred, _span)| { + // dyn Trait is okay: + // + // trait Trait { + // fn f(&self) where Self: 'static; + // } + // + // because a trait object can't claim to live longer than the concrete + // type. If the lifetime bound holds on dyn Trait then it's guaranteed + // to hold as well on the concrete type. + if pred.as_type_outlives_clause().is_some() { + return false; + } + + // dyn Trait is okay: + // + // auto trait AutoTrait {} + // + // trait Trait { + // fn f(&self) where Self: AutoTrait; + // } + // + // because `impl AutoTrait for dyn Trait` is disallowed by coherence. + // Traits with a default impl are implemented for a trait object if and + // only if the autotrait is one of the trait object's trait bounds, like + // in `dyn Trait + AutoTrait`. This guarantees that trait objects only + // implement auto traits if the underlying type does as well. + if let ty::ClauseKind::Trait(ty::TraitPredicate { + trait_ref: pred_trait_ref, + polarity: ty::PredicatePolarity::Positive, + }) = pred.kind().skip_binder() + && pred_trait_ref.self_ty() == tcx.types.self_param + && tcx.trait_is_auto(pred_trait_ref.def_id) + { + // Consider bounds like `Self: Bound`. Auto traits are not + // allowed to have generic parameters so `auto trait Bound {}` + // would already have reported an error at the definition of the + // auto trait. + if pred_trait_ref.args.len() != 1 { + assert!( + tcx.dcx().has_errors().is_some(), + "auto traits cannot have generic parameters" + ); + } + return false; + } + + contains_illegal_self_type_reference(tcx, trait_def_id, pred, AllowSelfProjections::Yes) + }) { + errors.push(MethodViolationCode::WhereClauseReferencesSelf); + } + + errors +} + +/// This code checks that `receiver_is_dispatchable` is correctly implemented. +/// +/// This check is outlined from the object safety check to avoid cycles with +/// layout computation, which relies on knowing whether methods are object safe. +fn check_receiver_correct<'tcx>(tcx: TyCtxt<'tcx>, trait_def_id: DefId, method: ty::AssocItem) { + if !is_vtable_safe_method(tcx, trait_def_id, method) { + return; + } + + let method_def_id = method.def_id; + let sig = tcx.fn_sig(method_def_id).instantiate_identity(); + let param_env = tcx.param_env(method_def_id); + let receiver_ty = tcx.liberate_late_bound_regions(method_def_id, sig.input(0)); + + if receiver_ty == tcx.types.self_param { + // Assumed OK, may change later if unsized_locals permits `self: Self` as dispatchable. + return; + } + + // e.g., `Rc<()>` + let unit_receiver_ty = receiver_for_self_ty(tcx, receiver_ty, tcx.types.unit, method_def_id); + match tcx.layout_of(param_env.and(unit_receiver_ty)).map(|l| l.abi) { + Ok(Abi::Scalar(..)) => (), + abi => { + tcx.dcx().span_delayed_bug( + tcx.def_span(method_def_id), + format!("receiver {unit_receiver_ty:?} when `Self = ()` should have a Scalar ABI; found {abi:?}"), + ); + } + } + + let trait_object_ty = object_ty_for_trait(tcx, trait_def_id, tcx.lifetimes.re_static); + + // e.g., `Rc` + let trait_object_receiver = + receiver_for_self_ty(tcx, receiver_ty, trait_object_ty, method_def_id); + match tcx.layout_of(param_env.and(trait_object_receiver)).map(|l| l.abi) { + Ok(Abi::ScalarPair(..)) => (), + abi => { + tcx.dcx().span_delayed_bug( + tcx.def_span(method_def_id), + format!( + "receiver {trait_object_receiver:?} when `Self = {trait_object_ty}` should have a ScalarPair ABI; found {abi:?}" + ), + ); + } + } +} + +/// Performs a type instantiation to produce the version of `receiver_ty` when `Self = self_ty`. +/// For example, for `receiver_ty = Rc` and `self_ty = Foo`, returns `Rc`. +fn receiver_for_self_ty<'tcx>( + tcx: TyCtxt<'tcx>, + receiver_ty: Ty<'tcx>, + self_ty: Ty<'tcx>, + method_def_id: DefId, +) -> Ty<'tcx> { + debug!("receiver_for_self_ty({:?}, {:?}, {:?})", receiver_ty, self_ty, method_def_id); + let args = GenericArgs::for_item(tcx, method_def_id, |param, _| { + if param.index == 0 { self_ty.into() } else { tcx.mk_param_from_def(param) } + }); + + let result = EarlyBinder::bind(receiver_ty).instantiate(tcx, args); + debug!( + "receiver_for_self_ty({:?}, {:?}, {:?}) = {:?}", + receiver_ty, self_ty, method_def_id, result + ); + result +} + +/// Creates the object type for the current trait. For example, +/// if the current trait is `Deref`, then this will be +/// `dyn Deref + 'static`. +#[instrument(level = "trace", skip(tcx), ret)] +fn object_ty_for_trait<'tcx>( + tcx: TyCtxt<'tcx>, + trait_def_id: DefId, + lifetime: ty::Region<'tcx>, +) -> Ty<'tcx> { + let trait_ref = ty::TraitRef::identity(tcx, trait_def_id); + debug!(?trait_ref); + + let trait_predicate = ty::Binder::dummy(ty::ExistentialPredicate::Trait( + ty::ExistentialTraitRef::erase_self_ty(tcx, trait_ref), + )); + debug!(?trait_predicate); + + let pred: ty::Predicate<'tcx> = trait_ref.upcast(tcx); + let mut elaborated_predicates: Vec<_> = elaborate(tcx, [pred]) + .filter_map(|pred| { + debug!(?pred); + let pred = pred.as_projection_clause()?; + Some(pred.map_bound(|p| { + ty::ExistentialPredicate::Projection(ty::ExistentialProjection::erase_self_ty( + tcx, p, + )) + })) + }) + .collect(); + // NOTE: Since #37965, the existential predicates list has depended on the + // list of predicates to be sorted. This is mostly to enforce that the primary + // predicate comes first. + elaborated_predicates.sort_by(|a, b| a.skip_binder().stable_cmp(tcx, &b.skip_binder())); + elaborated_predicates.dedup(); + + let existential_predicates = tcx.mk_poly_existential_predicates_from_iter( + iter::once(trait_predicate).chain(elaborated_predicates), + ); + debug!(?existential_predicates); + + Ty::new_dynamic(tcx, existential_predicates, lifetime, ty::Dyn) +} + +/// Checks the method's receiver (the `self` argument) can be dispatched on when `Self` is a +/// trait object. We require that `DispatchableFromDyn` be implemented for the receiver type +/// in the following way: +/// - let `Receiver` be the type of the `self` argument, i.e `Self`, `&Self`, `Rc`, +/// - require the following bound: +/// +/// ```ignore (not-rust) +/// Receiver[Self => T]: DispatchFromDyn dyn Trait]> +/// ``` +/// +/// where `Foo[X => Y]` means "the same type as `Foo`, but with `X` replaced with `Y`" +/// (instantiation notation). +/// +/// Some examples of receiver types and their required obligation: +/// - `&'a mut self` requires `&'a mut Self: DispatchFromDyn<&'a mut dyn Trait>`, +/// - `self: Rc` requires `Rc: DispatchFromDyn>`, +/// - `self: Pin>` requires `Pin>: DispatchFromDyn>>`. +/// +/// The only case where the receiver is not dispatchable, but is still a valid receiver +/// type (just not object-safe), is when there is more than one level of pointer indirection. +/// E.g., `self: &&Self`, `self: &Rc`, `self: Box>`. In these cases, there +/// is no way, or at least no inexpensive way, to coerce the receiver from the version where +/// `Self = dyn Trait` to the version where `Self = T`, where `T` is the unknown erased type +/// contained by the trait object, because the object that needs to be coerced is behind +/// a pointer. +/// +/// In practice, we cannot use `dyn Trait` explicitly in the obligation because it would result +/// in a new check that `Trait` is object safe, creating a cycle (until object_safe_for_dispatch +/// is stabilized, see tracking issue ). +/// Instead, we fudge a little by introducing a new type parameter `U` such that +/// `Self: Unsize` and `U: Trait + ?Sized`, and use `U` in place of `dyn Trait`. +/// Written as a chalk-style query: +/// ```ignore (not-rust) +/// forall (U: Trait + ?Sized) { +/// if (Self: Unsize) { +/// Receiver: DispatchFromDyn U]> +/// } +/// } +/// ``` +/// for `self: &'a mut Self`, this means `&'a mut Self: DispatchFromDyn<&'a mut U>` +/// for `self: Rc`, this means `Rc: DispatchFromDyn>` +/// for `self: Pin>`, this means `Pin>: DispatchFromDyn>>` +// +// FIXME(mikeyhew) when unsized receivers are implemented as part of unsized rvalues, add this +// fallback query: `Receiver: Unsize U]>` to support receivers like +// `self: Wrapper`. +fn receiver_is_dispatchable<'tcx>( + tcx: TyCtxt<'tcx>, + method: ty::AssocItem, + receiver_ty: Ty<'tcx>, +) -> bool { + debug!("receiver_is_dispatchable: method = {:?}, receiver_ty = {:?}", method, receiver_ty); + + let traits = (tcx.lang_items().unsize_trait(), tcx.lang_items().dispatch_from_dyn_trait()); + let (Some(unsize_did), Some(dispatch_from_dyn_did)) = traits else { + debug!("receiver_is_dispatchable: Missing Unsize or DispatchFromDyn traits"); + return false; + }; + + // the type `U` in the query + // use a bogus type parameter to mimic a forall(U) query using u32::MAX for now. + // FIXME(mikeyhew) this is a total hack. Once object_safe_for_dispatch is stabilized, we can + // replace this with `dyn Trait` + let unsized_self_ty: Ty<'tcx> = + Ty::new_param(tcx, u32::MAX, Symbol::intern("RustaceansAreAwesome")); + + // `Receiver[Self => U]` + let unsized_receiver_ty = + receiver_for_self_ty(tcx, receiver_ty, unsized_self_ty, method.def_id); + + // create a modified param env, with `Self: Unsize` and `U: Trait` added to caller bounds + // `U: ?Sized` is already implied here + let param_env = { + let param_env = tcx.param_env(method.def_id); + + // Self: Unsize + let unsize_predicate = + ty::TraitRef::new(tcx, unsize_did, [tcx.types.self_param, unsized_self_ty]).upcast(tcx); + + // U: Trait + let trait_predicate = { + let trait_def_id = method.trait_container(tcx).unwrap(); + let args = GenericArgs::for_item(tcx, trait_def_id, |param, _| { + if param.index == 0 { unsized_self_ty.into() } else { tcx.mk_param_from_def(param) } + }); + + ty::TraitRef::new_from_args(tcx, trait_def_id, args).upcast(tcx) + }; + + let caller_bounds = + param_env.caller_bounds().iter().chain([unsize_predicate, trait_predicate]); + + ty::ParamEnv::new(tcx.mk_clauses_from_iter(caller_bounds), param_env.reveal()) + }; + + // Receiver: DispatchFromDyn U]> + let obligation = { + let predicate = + ty::TraitRef::new(tcx, dispatch_from_dyn_did, [receiver_ty, unsized_receiver_ty]); + + Obligation::new(tcx, ObligationCause::dummy(), param_env, predicate) + }; + + let infcx = tcx.infer_ctxt().build(); + // the receiver is dispatchable iff the obligation holds + infcx.predicate_must_hold_modulo_regions(&obligation) +} + +#[derive(Copy, Clone)] +enum AllowSelfProjections { + Yes, + No, +} + +/// This is somewhat subtle. In general, we want to forbid +/// references to `Self` in the argument and return types, +/// since the value of `Self` is erased. However, there is one +/// exception: it is ok to reference `Self` in order to access +/// an associated type of the current trait, since we retain +/// the value of those associated types in the object type +/// itself. +/// +/// ```rust,ignore (example) +/// trait SuperTrait { +/// type X; +/// } +/// +/// trait Trait : SuperTrait { +/// type Y; +/// fn foo(&self, x: Self) // bad +/// fn foo(&self) -> Self // bad +/// fn foo(&self) -> Option // bad +/// fn foo(&self) -> Self::Y // OK, desugars to next example +/// fn foo(&self) -> ::Y // OK +/// fn foo(&self) -> Self::X // OK, desugars to next example +/// fn foo(&self) -> ::X // OK +/// } +/// ``` +/// +/// However, it is not as simple as allowing `Self` in a projected +/// type, because there are illegal ways to use `Self` as well: +/// +/// ```rust,ignore (example) +/// trait Trait : SuperTrait { +/// ... +/// fn foo(&self) -> ::X; +/// } +/// ``` +/// +/// Here we will not have the type of `X` recorded in the +/// object type, and we cannot resolve `Self as SomeOtherTrait` +/// without knowing what `Self` is. +fn contains_illegal_self_type_reference<'tcx, T: TypeVisitable>>( + tcx: TyCtxt<'tcx>, + trait_def_id: DefId, + value: T, + allow_self_projections: AllowSelfProjections, +) -> bool { + value + .visit_with(&mut IllegalSelfTypeVisitor { + tcx, + trait_def_id, + supertraits: None, + allow_self_projections, + }) + .is_break() +} + +struct IllegalSelfTypeVisitor<'tcx> { + tcx: TyCtxt<'tcx>, + trait_def_id: DefId, + supertraits: Option>>, + allow_self_projections: AllowSelfProjections, +} + +impl<'tcx> TypeVisitor> for IllegalSelfTypeVisitor<'tcx> { + type Result = ControlFlow<()>; + + fn visit_ty(&mut self, t: Ty<'tcx>) -> Self::Result { + match t.kind() { + ty::Param(_) => { + if t == self.tcx.types.self_param { + ControlFlow::Break(()) + } else { + ControlFlow::Continue(()) + } + } + ty::Alias(ty::Projection, ref data) if self.tcx.is_impl_trait_in_trait(data.def_id) => { + // We'll deny these later in their own pass + ControlFlow::Continue(()) + } + ty::Alias(ty::Projection, ref data) => { + match self.allow_self_projections { + AllowSelfProjections::Yes => { + // This is a projected type `::X`. + + // Compute supertraits of current trait lazily. + if self.supertraits.is_none() { + self.supertraits = Some( + util::supertraits( + self.tcx, + ty::Binder::dummy(ty::TraitRef::identity( + self.tcx, + self.trait_def_id, + )), + ) + .map(|trait_ref| { + self.tcx.erase_regions( + self.tcx.instantiate_bound_regions_with_erased(trait_ref), + ) + }) + .collect(), + ); + } + + // Determine whether the trait reference `Foo as + // SomeTrait` is in fact a supertrait of the + // current trait. In that case, this type is + // legal, because the type `X` will be specified + // in the object type. Note that we can just use + // direct equality here because all of these types + // are part of the formal parameter listing, and + // hence there should be no inference variables. + let is_supertrait_of_current_trait = + self.supertraits.as_ref().unwrap().contains( + &data.trait_ref(self.tcx).fold_with( + &mut EraseEscapingBoundRegions { + tcx: self.tcx, + binder: ty::INNERMOST, + }, + ), + ); + + // only walk contained types if it's not a super trait + if is_supertrait_of_current_trait { + ControlFlow::Continue(()) + } else { + t.super_visit_with(self) // POSSIBLY reporting an error + } + } + AllowSelfProjections::No => t.super_visit_with(self), + } + } + _ => t.super_visit_with(self), + } + } + + fn visit_const(&mut self, ct: ty::Const<'tcx>) -> Self::Result { + // Constants can only influence object safety if they are generic and reference `Self`. + // This is only possible for unevaluated constants, so we walk these here. + self.tcx.expand_abstract_consts(ct).super_visit_with(self) + } +} + +struct EraseEscapingBoundRegions<'tcx> { + tcx: TyCtxt<'tcx>, + binder: ty::DebruijnIndex, +} + +impl<'tcx> TypeFolder> for EraseEscapingBoundRegions<'tcx> { + fn cx(&self) -> TyCtxt<'tcx> { + self.tcx + } + + fn fold_binder(&mut self, t: ty::Binder<'tcx, T>) -> ty::Binder<'tcx, T> + where + T: TypeFoldable>, + { + self.binder.shift_in(1); + let result = t.super_fold_with(self); + self.binder.shift_out(1); + result + } + + fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { + if let ty::ReBound(debruijn, _) = *r + && debruijn < self.binder + { + r + } else { + self.tcx.lifetimes.re_erased + } + } +} + +fn contains_illegal_impl_trait_in_trait<'tcx>( + tcx: TyCtxt<'tcx>, + fn_def_id: DefId, + ty: ty::Binder<'tcx, Ty<'tcx>>, +) -> Option { + // This would be caught below, but rendering the error as a separate + // `async-specific` message is better. + if tcx.asyncness(fn_def_id).is_async() { + return Some(MethodViolationCode::AsyncFn); + } + + // FIXME(RPITIT): Perhaps we should use a visitor here? + ty.skip_binder().walk().find_map(|arg| { + if let ty::GenericArgKind::Type(ty) = arg.unpack() + && let ty::Alias(ty::Projection, proj) = ty.kind() + && tcx.is_impl_trait_in_trait(proj.def_id) + { + Some(MethodViolationCode::ReferencesImplTraitInTrait(tcx.def_span(proj.def_id))) + } else { + None + } + }) +} + +pub(crate) fn provide(providers: &mut Providers) { + *providers = Providers { + dyn_compatibility_violations, + is_dyn_compatible, + generics_require_sized_self, + ..*providers + }; +} diff --git a/compiler/rustc_trait_selection/src/traits/fulfill.rs b/compiler/rustc_trait_selection/src/traits/fulfill.rs index fcd0936c055..33b8cf03701 100644 --- a/compiler/rustc_trait_selection/src/traits/fulfill.rs +++ b/compiler/rustc_trait_selection/src/traits/fulfill.rs @@ -363,7 +363,7 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> { | ty::PredicateKind::Clause(ty::ClauseKind::TypeOutlives(_)) | ty::PredicateKind::Clause(ty::ClauseKind::ConstArgHasType(..)) | ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(_)) - | ty::PredicateKind::ObjectSafe(_) + | ty::PredicateKind::DynCompatible(_) | ty::PredicateKind::Subtype(_) | ty::PredicateKind::Coerce(_) | ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..)) @@ -418,8 +418,8 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> { ) } - ty::PredicateKind::ObjectSafe(trait_def_id) => { - if !self.selcx.tcx().is_object_safe(trait_def_id) { + ty::PredicateKind::DynCompatible(trait_def_id) => { + if !self.selcx.tcx().is_dyn_compatible(trait_def_id) { ProcessResult::Error(FulfillmentErrorCode::Select(Unimplemented)) } else { ProcessResult::Changed(vec![]) diff --git a/compiler/rustc_trait_selection/src/traits/mod.rs b/compiler/rustc_trait_selection/src/traits/mod.rs index 61592d47784..655bef0bab7 100644 --- a/compiler/rustc_trait_selection/src/traits/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/mod.rs @@ -5,11 +5,11 @@ pub mod auto_trait; pub(crate) mod coherence; pub mod const_evaluatable; +mod dyn_compatibility; mod engine; mod fulfill; pub mod misc; pub mod normalize; -mod object_safety; pub mod outlives_bounds; pub mod project; pub mod query; @@ -43,13 +43,13 @@ pub use self::coherence::{ InCrate, IsFirstInputType, OrphanCheckErr, OrphanCheckMode, OverlapResult, UncoveredTyParams, add_placeholder_note, orphan_check_trait_ref, overlapping_impls, }; +pub use self::dyn_compatibility::{ + DynCompatibilityViolation, dyn_compatibility_violations_for_assoc_item, + hir_ty_lowering_dyn_compatibility_violations, is_vtable_safe_method, +}; pub use self::engine::{ObligationCtxt, TraitEngineExt}; pub use self::fulfill::{FulfillmentContext, OldSolverError, PendingPredicateObligation}; pub use self::normalize::NormalizeExt; -pub use self::object_safety::{ - ObjectSafetyViolation, hir_ty_lowering_object_safety_violations, is_vtable_safe_method, - object_safety_violations_for_assoc_item, -}; pub use self::project::{normalize_inherent_projection, normalize_projection_ty}; pub use self::select::{ EvaluationCache, EvaluationResult, IntercrateAmbiguityCause, OverflowError, SelectionCache, @@ -593,7 +593,7 @@ fn is_impossible_associated_item( } pub fn provide(providers: &mut Providers) { - object_safety::provide(providers); + dyn_compatibility::provide(providers); vtable::provide(providers); *providers = Providers { specialization_graph_of: specialize::specialization_graph_provider, diff --git a/compiler/rustc_trait_selection/src/traits/object_safety.rs b/compiler/rustc_trait_selection/src/traits/object_safety.rs deleted file mode 100644 index b6169f8508d..00000000000 --- a/compiler/rustc_trait_selection/src/traits/object_safety.rs +++ /dev/null @@ -1,940 +0,0 @@ -//! "Object safety" refers to the ability for a trait to be converted -//! to an object. In general, traits may only be converted to an -//! object if all of their methods meet certain criteria. In particular, -//! they must: -//! -//! - have a suitable receiver from which we can extract a vtable and coerce to a "thin" version -//! that doesn't contain the vtable; -//! - not reference the erased type `Self` except for in this receiver; -//! - not have generic type parameters. - -use std::iter; -use std::ops::ControlFlow; - -use rustc_errors::FatalError; -use rustc_hir as hir; -use rustc_hir::def_id::DefId; -use rustc_middle::query::Providers; -use rustc_middle::ty::{ - self, EarlyBinder, ExistentialPredicateStableCmpExt as _, GenericArgs, Ty, TyCtxt, - TypeFoldable, TypeFolder, TypeSuperFoldable, TypeSuperVisitable, TypeVisitable, - TypeVisitableExt, TypeVisitor, Upcast, -}; -use rustc_span::Span; -use rustc_span::symbol::Symbol; -use rustc_target::abi::Abi; -use smallvec::SmallVec; -use tracing::{debug, instrument}; - -use super::elaborate; -use crate::infer::TyCtxtInferExt; -pub use crate::traits::ObjectSafetyViolation; -use crate::traits::query::evaluate_obligation::InferCtxtExt; -use crate::traits::{MethodViolationCode, Obligation, ObligationCause, util}; - -/// Returns the object safety violations that affect HIR ty lowering. -/// -/// Currently that is `Self` in supertraits. This is needed -/// because `object_safety_violations` can't be used during -/// type collection. -#[instrument(level = "debug", skip(tcx))] -pub fn hir_ty_lowering_object_safety_violations( - tcx: TyCtxt<'_>, - trait_def_id: DefId, -) -> Vec { - debug_assert!(tcx.generics_of(trait_def_id).has_self); - let violations = tcx - .supertrait_def_ids(trait_def_id) - .map(|def_id| predicates_reference_self(tcx, def_id, true)) - .filter(|spans| !spans.is_empty()) - .map(ObjectSafetyViolation::SupertraitSelf) - .collect(); - debug!(?violations); - violations -} - -fn object_safety_violations(tcx: TyCtxt<'_>, trait_def_id: DefId) -> &'_ [ObjectSafetyViolation] { - debug_assert!(tcx.generics_of(trait_def_id).has_self); - debug!("object_safety_violations: {:?}", trait_def_id); - - tcx.arena.alloc_from_iter( - tcx.supertrait_def_ids(trait_def_id) - .flat_map(|def_id| object_safety_violations_for_trait(tcx, def_id)), - ) -} - -fn is_object_safe(tcx: TyCtxt<'_>, trait_def_id: DefId) -> bool { - tcx.object_safety_violations(trait_def_id).is_empty() -} - -/// We say a method is *vtable safe* if it can be invoked on a trait -/// object. Note that object-safe traits can have some -/// non-vtable-safe methods, so long as they require `Self: Sized` or -/// otherwise ensure that they cannot be used when `Self = Trait`. -pub fn is_vtable_safe_method(tcx: TyCtxt<'_>, trait_def_id: DefId, method: ty::AssocItem) -> bool { - debug_assert!(tcx.generics_of(trait_def_id).has_self); - debug!("is_vtable_safe_method({:?}, {:?})", trait_def_id, method); - // Any method that has a `Self: Sized` bound cannot be called. - if tcx.generics_require_sized_self(method.def_id) { - return false; - } - - virtual_call_violations_for_method(tcx, trait_def_id, method).is_empty() -} - -fn object_safety_violations_for_trait( - tcx: TyCtxt<'_>, - trait_def_id: DefId, -) -> Vec { - // Check assoc items for violations. - let mut violations: Vec<_> = tcx - .associated_items(trait_def_id) - .in_definition_order() - .flat_map(|&item| object_safety_violations_for_assoc_item(tcx, trait_def_id, item)) - .collect(); - - // Check the trait itself. - if trait_has_sized_self(tcx, trait_def_id) { - // We don't want to include the requirement from `Sized` itself to be `Sized` in the list. - let spans = get_sized_bounds(tcx, trait_def_id); - violations.push(ObjectSafetyViolation::SizedSelf(spans)); - } - let spans = predicates_reference_self(tcx, trait_def_id, false); - if !spans.is_empty() { - violations.push(ObjectSafetyViolation::SupertraitSelf(spans)); - } - let spans = bounds_reference_self(tcx, trait_def_id); - if !spans.is_empty() { - violations.push(ObjectSafetyViolation::SupertraitSelf(spans)); - } - let spans = super_predicates_have_non_lifetime_binders(tcx, trait_def_id); - if !spans.is_empty() { - violations.push(ObjectSafetyViolation::SupertraitNonLifetimeBinder(spans)); - } - - if violations.is_empty() { - for item in tcx.associated_items(trait_def_id).in_definition_order() { - if let ty::AssocKind::Fn = item.kind { - check_receiver_correct(tcx, trait_def_id, *item); - } - } - } - - debug!( - "object_safety_violations_for_trait(trait_def_id={:?}) = {:?}", - trait_def_id, violations - ); - - violations -} - -fn sized_trait_bound_spans<'tcx>( - tcx: TyCtxt<'tcx>, - bounds: hir::GenericBounds<'tcx>, -) -> impl 'tcx + Iterator { - bounds.iter().filter_map(move |b| match b { - hir::GenericBound::Trait(trait_ref, hir::TraitBoundModifier::None) - if trait_has_sized_self( - tcx, - trait_ref.trait_ref.trait_def_id().unwrap_or_else(|| FatalError.raise()), - ) => - { - // Fetch spans for supertraits that are `Sized`: `trait T: Super` - Some(trait_ref.span) - } - _ => None, - }) -} - -fn get_sized_bounds(tcx: TyCtxt<'_>, trait_def_id: DefId) -> SmallVec<[Span; 1]> { - tcx.hir() - .get_if_local(trait_def_id) - .and_then(|node| match node { - hir::Node::Item(hir::Item { - kind: hir::ItemKind::Trait(.., generics, bounds, _), - .. - }) => Some( - generics - .predicates - .iter() - .filter_map(|pred| { - match pred { - hir::WherePredicate::BoundPredicate(pred) - if pred.bounded_ty.hir_id.owner.to_def_id() == trait_def_id => - { - // Fetch spans for trait bounds that are Sized: - // `trait T where Self: Pred` - Some(sized_trait_bound_spans(tcx, pred.bounds)) - } - _ => None, - } - }) - .flatten() - // Fetch spans for supertraits that are `Sized`: `trait T: Super`. - .chain(sized_trait_bound_spans(tcx, bounds)) - .collect::>(), - ), - _ => None, - }) - .unwrap_or_else(SmallVec::new) -} - -fn predicates_reference_self( - tcx: TyCtxt<'_>, - trait_def_id: DefId, - supertraits_only: bool, -) -> SmallVec<[Span; 1]> { - let trait_ref = ty::Binder::dummy(ty::TraitRef::identity(tcx, trait_def_id)); - let predicates = if supertraits_only { - tcx.explicit_super_predicates_of(trait_def_id).skip_binder() - } else { - tcx.predicates_of(trait_def_id).predicates - }; - predicates - .iter() - .map(|&(predicate, sp)| (predicate.instantiate_supertrait(tcx, trait_ref), sp)) - .filter_map(|(clause, sp)| { - // Super predicates cannot allow self projections, since they're - // impossible to make into existential bounds without eager resolution - // or something. - // e.g. `trait A: B`. - predicate_references_self(tcx, trait_def_id, clause, sp, AllowSelfProjections::No) - }) - .collect() -} - -fn bounds_reference_self(tcx: TyCtxt<'_>, trait_def_id: DefId) -> SmallVec<[Span; 1]> { - tcx.associated_items(trait_def_id) - .in_definition_order() - .filter(|item| item.kind == ty::AssocKind::Type) - .flat_map(|item| tcx.explicit_item_bounds(item.def_id).iter_identity_copied()) - .filter_map(|(clause, sp)| { - // Item bounds *can* have self projections, since they never get - // their self type erased. - predicate_references_self(tcx, trait_def_id, clause, sp, AllowSelfProjections::Yes) - }) - .collect() -} - -fn predicate_references_self<'tcx>( - tcx: TyCtxt<'tcx>, - trait_def_id: DefId, - predicate: ty::Clause<'tcx>, - sp: Span, - allow_self_projections: AllowSelfProjections, -) -> Option { - match predicate.kind().skip_binder() { - ty::ClauseKind::Trait(ref data) => { - // In the case of a trait predicate, we can skip the "self" type. - data.trait_ref.args[1..].iter().any(|&arg| contains_illegal_self_type_reference(tcx, trait_def_id, arg, allow_self_projections)).then_some(sp) - } - ty::ClauseKind::Projection(ref data) => { - // And similarly for projections. This should be redundant with - // the previous check because any projection should have a - // matching `Trait` predicate with the same inputs, but we do - // the check to be safe. - // - // It's also won't be redundant if we allow type-generic associated - // types for trait objects. - // - // Note that we *do* allow projection *outputs* to contain - // `self` (i.e., `trait Foo: Bar { type Result; }`), - // we just require the user to specify *both* outputs - // in the object type (i.e., `dyn Foo`). - // - // This is ALT2 in issue #56288, see that for discussion of the - // possible alternatives. - data.projection_term.args[1..].iter().any(|&arg| contains_illegal_self_type_reference(tcx, trait_def_id, arg, allow_self_projections)).then_some(sp) - } - ty::ClauseKind::ConstArgHasType(_ct, ty) => contains_illegal_self_type_reference(tcx, trait_def_id, ty, allow_self_projections).then_some(sp), - - ty::ClauseKind::WellFormed(..) - | ty::ClauseKind::TypeOutlives(..) - | ty::ClauseKind::RegionOutlives(..) - // FIXME(generic_const_exprs): this can mention `Self` - | ty::ClauseKind::ConstEvaluatable(..) - => None, - } -} - -fn super_predicates_have_non_lifetime_binders( - tcx: TyCtxt<'_>, - trait_def_id: DefId, -) -> SmallVec<[Span; 1]> { - // If non_lifetime_binders is disabled, then exit early - if !tcx.features().non_lifetime_binders { - return SmallVec::new(); - } - tcx.explicit_super_predicates_of(trait_def_id) - .iter_identity_copied() - .filter_map(|(pred, span)| pred.has_non_region_bound_vars().then_some(span)) - .collect() -} - -fn trait_has_sized_self(tcx: TyCtxt<'_>, trait_def_id: DefId) -> bool { - tcx.generics_require_sized_self(trait_def_id) -} - -fn generics_require_sized_self(tcx: TyCtxt<'_>, def_id: DefId) -> bool { - let Some(sized_def_id) = tcx.lang_items().sized_trait() else { - return false; /* No Sized trait, can't require it! */ - }; - - // Search for a predicate like `Self : Sized` amongst the trait bounds. - let predicates = tcx.predicates_of(def_id); - let predicates = predicates.instantiate_identity(tcx).predicates; - elaborate(tcx, predicates).any(|pred| match pred.kind().skip_binder() { - ty::ClauseKind::Trait(ref trait_pred) => { - trait_pred.def_id() == sized_def_id && trait_pred.self_ty().is_param(0) - } - ty::ClauseKind::RegionOutlives(_) - | ty::ClauseKind::TypeOutlives(_) - | ty::ClauseKind::Projection(_) - | ty::ClauseKind::ConstArgHasType(_, _) - | ty::ClauseKind::WellFormed(_) - | ty::ClauseKind::ConstEvaluatable(_) => false, - }) -} - -/// Returns `Some(_)` if this item makes the containing trait not object safe. -#[instrument(level = "debug", skip(tcx), ret)] -pub fn object_safety_violations_for_assoc_item( - tcx: TyCtxt<'_>, - trait_def_id: DefId, - item: ty::AssocItem, -) -> Vec { - // Any item that has a `Self : Sized` requisite is otherwise - // exempt from the regulations. - if tcx.generics_require_sized_self(item.def_id) { - return Vec::new(); - } - - match item.kind { - // Associated consts are never object safe, as they can't have `where` bounds yet at all, - // and associated const bounds in trait objects aren't a thing yet either. - ty::AssocKind::Const => { - vec![ObjectSafetyViolation::AssocConst(item.name, item.ident(tcx).span)] - } - ty::AssocKind::Fn => virtual_call_violations_for_method(tcx, trait_def_id, item) - .into_iter() - .map(|v| { - let node = tcx.hir().get_if_local(item.def_id); - // Get an accurate span depending on the violation. - let span = match (&v, node) { - (MethodViolationCode::ReferencesSelfInput(Some(span)), _) => *span, - (MethodViolationCode::UndispatchableReceiver(Some(span)), _) => *span, - (MethodViolationCode::ReferencesImplTraitInTrait(span), _) => *span, - (MethodViolationCode::ReferencesSelfOutput, Some(node)) => { - node.fn_decl().map_or(item.ident(tcx).span, |decl| decl.output.span()) - } - _ => item.ident(tcx).span, - }; - - ObjectSafetyViolation::Method(item.name, v, span) - }) - .collect(), - // Associated types can only be object safe if they have `Self: Sized` bounds. - ty::AssocKind::Type => { - if !tcx.features().generic_associated_types_extended - && !tcx.generics_of(item.def_id).is_own_empty() - && !item.is_impl_trait_in_trait() - { - vec![ObjectSafetyViolation::GAT(item.name, item.ident(tcx).span)] - } else { - // We will permit associated types if they are explicitly mentioned in the trait object. - // We can't check this here, as here we only check if it is guaranteed to not be possible. - Vec::new() - } - } - } -} - -/// Returns `Some(_)` if this method cannot be called on a trait -/// object; this does not necessarily imply that the enclosing trait -/// is not object safe, because the method might have a where clause -/// `Self:Sized`. -fn virtual_call_violations_for_method<'tcx>( - tcx: TyCtxt<'tcx>, - trait_def_id: DefId, - method: ty::AssocItem, -) -> Vec { - let sig = tcx.fn_sig(method.def_id).instantiate_identity(); - - // The method's first parameter must be named `self` - if !method.fn_has_self_parameter { - let sugg = if let Some(hir::Node::TraitItem(hir::TraitItem { - generics, - kind: hir::TraitItemKind::Fn(sig, _), - .. - })) = tcx.hir().get_if_local(method.def_id).as_ref() - { - let sm = tcx.sess.source_map(); - Some(( - ( - format!("&self{}", if sig.decl.inputs.is_empty() { "" } else { ", " }), - sm.span_through_char(sig.span, '(').shrink_to_hi(), - ), - ( - format!("{} Self: Sized", generics.add_where_or_trailing_comma()), - generics.tail_span_for_predicate_suggestion(), - ), - )) - } else { - None - }; - - // Not having `self` parameter messes up the later checks, - // so we need to return instead of pushing - return vec![MethodViolationCode::StaticMethod(sugg)]; - } - - let mut errors = Vec::new(); - - for (i, &input_ty) in sig.skip_binder().inputs().iter().enumerate().skip(1) { - if contains_illegal_self_type_reference( - tcx, - trait_def_id, - sig.rebind(input_ty), - AllowSelfProjections::Yes, - ) { - let span = if let Some(hir::Node::TraitItem(hir::TraitItem { - kind: hir::TraitItemKind::Fn(sig, _), - .. - })) = tcx.hir().get_if_local(method.def_id).as_ref() - { - Some(sig.decl.inputs[i].span) - } else { - None - }; - errors.push(MethodViolationCode::ReferencesSelfInput(span)); - } - } - if contains_illegal_self_type_reference( - tcx, - trait_def_id, - sig.output(), - AllowSelfProjections::Yes, - ) { - errors.push(MethodViolationCode::ReferencesSelfOutput); - } - if let Some(code) = contains_illegal_impl_trait_in_trait(tcx, method.def_id, sig.output()) { - errors.push(code); - } - - // We can't monomorphize things like `fn foo(...)`. - let own_counts = tcx.generics_of(method.def_id).own_counts(); - if own_counts.types > 0 || own_counts.consts > 0 { - errors.push(MethodViolationCode::Generic); - } - - let receiver_ty = tcx.liberate_late_bound_regions(method.def_id, sig.input(0)); - - // Until `unsized_locals` is fully implemented, `self: Self` can't be dispatched on. - // However, this is already considered object-safe. We allow it as a special case here. - // FIXME(mikeyhew) get rid of this `if` statement once `receiver_is_dispatchable` allows - // `Receiver: Unsize dyn Trait]>`. - if receiver_ty != tcx.types.self_param { - if !receiver_is_dispatchable(tcx, method, receiver_ty) { - let span = if let Some(hir::Node::TraitItem(hir::TraitItem { - kind: hir::TraitItemKind::Fn(sig, _), - .. - })) = tcx.hir().get_if_local(method.def_id).as_ref() - { - Some(sig.decl.inputs[0].span) - } else { - None - }; - errors.push(MethodViolationCode::UndispatchableReceiver(span)); - } else { - // We confirm that the `receiver_is_dispatchable` is accurate later, - // see `check_receiver_correct`. It should be kept in sync with this code. - } - } - - // NOTE: This check happens last, because it results in a lint, and not a - // hard error. - if tcx.predicates_of(method.def_id).predicates.iter().any(|&(pred, _span)| { - // dyn Trait is okay: - // - // trait Trait { - // fn f(&self) where Self: 'static; - // } - // - // because a trait object can't claim to live longer than the concrete - // type. If the lifetime bound holds on dyn Trait then it's guaranteed - // to hold as well on the concrete type. - if pred.as_type_outlives_clause().is_some() { - return false; - } - - // dyn Trait is okay: - // - // auto trait AutoTrait {} - // - // trait Trait { - // fn f(&self) where Self: AutoTrait; - // } - // - // because `impl AutoTrait for dyn Trait` is disallowed by coherence. - // Traits with a default impl are implemented for a trait object if and - // only if the autotrait is one of the trait object's trait bounds, like - // in `dyn Trait + AutoTrait`. This guarantees that trait objects only - // implement auto traits if the underlying type does as well. - if let ty::ClauseKind::Trait(ty::TraitPredicate { - trait_ref: pred_trait_ref, - polarity: ty::PredicatePolarity::Positive, - }) = pred.kind().skip_binder() - && pred_trait_ref.self_ty() == tcx.types.self_param - && tcx.trait_is_auto(pred_trait_ref.def_id) - { - // Consider bounds like `Self: Bound`. Auto traits are not - // allowed to have generic parameters so `auto trait Bound {}` - // would already have reported an error at the definition of the - // auto trait. - if pred_trait_ref.args.len() != 1 { - assert!( - tcx.dcx().has_errors().is_some(), - "auto traits cannot have generic parameters" - ); - } - return false; - } - - contains_illegal_self_type_reference(tcx, trait_def_id, pred, AllowSelfProjections::Yes) - }) { - errors.push(MethodViolationCode::WhereClauseReferencesSelf); - } - - errors -} - -/// This code checks that `receiver_is_dispatchable` is correctly implemented. -/// -/// This check is outlined from the object safety check to avoid cycles with -/// layout computation, which relies on knowing whether methods are object safe. -fn check_receiver_correct<'tcx>(tcx: TyCtxt<'tcx>, trait_def_id: DefId, method: ty::AssocItem) { - if !is_vtable_safe_method(tcx, trait_def_id, method) { - return; - } - - let method_def_id = method.def_id; - let sig = tcx.fn_sig(method_def_id).instantiate_identity(); - let param_env = tcx.param_env(method_def_id); - let receiver_ty = tcx.liberate_late_bound_regions(method_def_id, sig.input(0)); - - if receiver_ty == tcx.types.self_param { - // Assumed OK, may change later if unsized_locals permits `self: Self` as dispatchable. - return; - } - - // e.g., `Rc<()>` - let unit_receiver_ty = receiver_for_self_ty(tcx, receiver_ty, tcx.types.unit, method_def_id); - match tcx.layout_of(param_env.and(unit_receiver_ty)).map(|l| l.abi) { - Ok(Abi::Scalar(..)) => (), - abi => { - tcx.dcx().span_delayed_bug( - tcx.def_span(method_def_id), - format!("receiver {unit_receiver_ty:?} when `Self = ()` should have a Scalar ABI; found {abi:?}"), - ); - } - } - - let trait_object_ty = object_ty_for_trait(tcx, trait_def_id, tcx.lifetimes.re_static); - - // e.g., `Rc` - let trait_object_receiver = - receiver_for_self_ty(tcx, receiver_ty, trait_object_ty, method_def_id); - match tcx.layout_of(param_env.and(trait_object_receiver)).map(|l| l.abi) { - Ok(Abi::ScalarPair(..)) => (), - abi => { - tcx.dcx().span_delayed_bug( - tcx.def_span(method_def_id), - format!( - "receiver {trait_object_receiver:?} when `Self = {trait_object_ty}` should have a ScalarPair ABI; found {abi:?}" - ), - ); - } - } -} - -/// Performs a type instantiation to produce the version of `receiver_ty` when `Self = self_ty`. -/// For example, for `receiver_ty = Rc` and `self_ty = Foo`, returns `Rc`. -fn receiver_for_self_ty<'tcx>( - tcx: TyCtxt<'tcx>, - receiver_ty: Ty<'tcx>, - self_ty: Ty<'tcx>, - method_def_id: DefId, -) -> Ty<'tcx> { - debug!("receiver_for_self_ty({:?}, {:?}, {:?})", receiver_ty, self_ty, method_def_id); - let args = GenericArgs::for_item(tcx, method_def_id, |param, _| { - if param.index == 0 { self_ty.into() } else { tcx.mk_param_from_def(param) } - }); - - let result = EarlyBinder::bind(receiver_ty).instantiate(tcx, args); - debug!( - "receiver_for_self_ty({:?}, {:?}, {:?}) = {:?}", - receiver_ty, self_ty, method_def_id, result - ); - result -} - -/// Creates the object type for the current trait. For example, -/// if the current trait is `Deref`, then this will be -/// `dyn Deref + 'static`. -#[instrument(level = "trace", skip(tcx), ret)] -fn object_ty_for_trait<'tcx>( - tcx: TyCtxt<'tcx>, - trait_def_id: DefId, - lifetime: ty::Region<'tcx>, -) -> Ty<'tcx> { - let trait_ref = ty::TraitRef::identity(tcx, trait_def_id); - debug!(?trait_ref); - - let trait_predicate = ty::Binder::dummy(ty::ExistentialPredicate::Trait( - ty::ExistentialTraitRef::erase_self_ty(tcx, trait_ref), - )); - debug!(?trait_predicate); - - let pred: ty::Predicate<'tcx> = trait_ref.upcast(tcx); - let mut elaborated_predicates: Vec<_> = elaborate(tcx, [pred]) - .filter_map(|pred| { - debug!(?pred); - let pred = pred.as_projection_clause()?; - Some(pred.map_bound(|p| { - ty::ExistentialPredicate::Projection(ty::ExistentialProjection::erase_self_ty( - tcx, p, - )) - })) - }) - .collect(); - // NOTE: Since #37965, the existential predicates list has depended on the - // list of predicates to be sorted. This is mostly to enforce that the primary - // predicate comes first. - elaborated_predicates.sort_by(|a, b| a.skip_binder().stable_cmp(tcx, &b.skip_binder())); - elaborated_predicates.dedup(); - - let existential_predicates = tcx.mk_poly_existential_predicates_from_iter( - iter::once(trait_predicate).chain(elaborated_predicates), - ); - debug!(?existential_predicates); - - Ty::new_dynamic(tcx, existential_predicates, lifetime, ty::Dyn) -} - -/// Checks the method's receiver (the `self` argument) can be dispatched on when `Self` is a -/// trait object. We require that `DispatchableFromDyn` be implemented for the receiver type -/// in the following way: -/// - let `Receiver` be the type of the `self` argument, i.e `Self`, `&Self`, `Rc`, -/// - require the following bound: -/// -/// ```ignore (not-rust) -/// Receiver[Self => T]: DispatchFromDyn dyn Trait]> -/// ``` -/// -/// where `Foo[X => Y]` means "the same type as `Foo`, but with `X` replaced with `Y`" -/// (instantiation notation). -/// -/// Some examples of receiver types and their required obligation: -/// - `&'a mut self` requires `&'a mut Self: DispatchFromDyn<&'a mut dyn Trait>`, -/// - `self: Rc` requires `Rc: DispatchFromDyn>`, -/// - `self: Pin>` requires `Pin>: DispatchFromDyn>>`. -/// -/// The only case where the receiver is not dispatchable, but is still a valid receiver -/// type (just not object-safe), is when there is more than one level of pointer indirection. -/// E.g., `self: &&Self`, `self: &Rc`, `self: Box>`. In these cases, there -/// is no way, or at least no inexpensive way, to coerce the receiver from the version where -/// `Self = dyn Trait` to the version where `Self = T`, where `T` is the unknown erased type -/// contained by the trait object, because the object that needs to be coerced is behind -/// a pointer. -/// -/// In practice, we cannot use `dyn Trait` explicitly in the obligation because it would result -/// in a new check that `Trait` is object safe, creating a cycle (until object_safe_for_dispatch -/// is stabilized, see tracking issue ). -/// Instead, we fudge a little by introducing a new type parameter `U` such that -/// `Self: Unsize` and `U: Trait + ?Sized`, and use `U` in place of `dyn Trait`. -/// Written as a chalk-style query: -/// ```ignore (not-rust) -/// forall (U: Trait + ?Sized) { -/// if (Self: Unsize) { -/// Receiver: DispatchFromDyn U]> -/// } -/// } -/// ``` -/// for `self: &'a mut Self`, this means `&'a mut Self: DispatchFromDyn<&'a mut U>` -/// for `self: Rc`, this means `Rc: DispatchFromDyn>` -/// for `self: Pin>`, this means `Pin>: DispatchFromDyn>>` -// -// FIXME(mikeyhew) when unsized receivers are implemented as part of unsized rvalues, add this -// fallback query: `Receiver: Unsize U]>` to support receivers like -// `self: Wrapper`. -fn receiver_is_dispatchable<'tcx>( - tcx: TyCtxt<'tcx>, - method: ty::AssocItem, - receiver_ty: Ty<'tcx>, -) -> bool { - debug!("receiver_is_dispatchable: method = {:?}, receiver_ty = {:?}", method, receiver_ty); - - let traits = (tcx.lang_items().unsize_trait(), tcx.lang_items().dispatch_from_dyn_trait()); - let (Some(unsize_did), Some(dispatch_from_dyn_did)) = traits else { - debug!("receiver_is_dispatchable: Missing Unsize or DispatchFromDyn traits"); - return false; - }; - - // the type `U` in the query - // use a bogus type parameter to mimic a forall(U) query using u32::MAX for now. - // FIXME(mikeyhew) this is a total hack. Once object_safe_for_dispatch is stabilized, we can - // replace this with `dyn Trait` - let unsized_self_ty: Ty<'tcx> = - Ty::new_param(tcx, u32::MAX, Symbol::intern("RustaceansAreAwesome")); - - // `Receiver[Self => U]` - let unsized_receiver_ty = - receiver_for_self_ty(tcx, receiver_ty, unsized_self_ty, method.def_id); - - // create a modified param env, with `Self: Unsize` and `U: Trait` added to caller bounds - // `U: ?Sized` is already implied here - let param_env = { - let param_env = tcx.param_env(method.def_id); - - // Self: Unsize - let unsize_predicate = - ty::TraitRef::new(tcx, unsize_did, [tcx.types.self_param, unsized_self_ty]).upcast(tcx); - - // U: Trait - let trait_predicate = { - let trait_def_id = method.trait_container(tcx).unwrap(); - let args = GenericArgs::for_item(tcx, trait_def_id, |param, _| { - if param.index == 0 { unsized_self_ty.into() } else { tcx.mk_param_from_def(param) } - }); - - ty::TraitRef::new_from_args(tcx, trait_def_id, args).upcast(tcx) - }; - - let caller_bounds = - param_env.caller_bounds().iter().chain([unsize_predicate, trait_predicate]); - - ty::ParamEnv::new(tcx.mk_clauses_from_iter(caller_bounds), param_env.reveal()) - }; - - // Receiver: DispatchFromDyn U]> - let obligation = { - let predicate = - ty::TraitRef::new(tcx, dispatch_from_dyn_did, [receiver_ty, unsized_receiver_ty]); - - Obligation::new(tcx, ObligationCause::dummy(), param_env, predicate) - }; - - let infcx = tcx.infer_ctxt().build(); - // the receiver is dispatchable iff the obligation holds - infcx.predicate_must_hold_modulo_regions(&obligation) -} - -#[derive(Copy, Clone)] -enum AllowSelfProjections { - Yes, - No, -} - -/// This is somewhat subtle. In general, we want to forbid -/// references to `Self` in the argument and return types, -/// since the value of `Self` is erased. However, there is one -/// exception: it is ok to reference `Self` in order to access -/// an associated type of the current trait, since we retain -/// the value of those associated types in the object type -/// itself. -/// -/// ```rust,ignore (example) -/// trait SuperTrait { -/// type X; -/// } -/// -/// trait Trait : SuperTrait { -/// type Y; -/// fn foo(&self, x: Self) // bad -/// fn foo(&self) -> Self // bad -/// fn foo(&self) -> Option // bad -/// fn foo(&self) -> Self::Y // OK, desugars to next example -/// fn foo(&self) -> ::Y // OK -/// fn foo(&self) -> Self::X // OK, desugars to next example -/// fn foo(&self) -> ::X // OK -/// } -/// ``` -/// -/// However, it is not as simple as allowing `Self` in a projected -/// type, because there are illegal ways to use `Self` as well: -/// -/// ```rust,ignore (example) -/// trait Trait : SuperTrait { -/// ... -/// fn foo(&self) -> ::X; -/// } -/// ``` -/// -/// Here we will not have the type of `X` recorded in the -/// object type, and we cannot resolve `Self as SomeOtherTrait` -/// without knowing what `Self` is. -fn contains_illegal_self_type_reference<'tcx, T: TypeVisitable>>( - tcx: TyCtxt<'tcx>, - trait_def_id: DefId, - value: T, - allow_self_projections: AllowSelfProjections, -) -> bool { - value - .visit_with(&mut IllegalSelfTypeVisitor { - tcx, - trait_def_id, - supertraits: None, - allow_self_projections, - }) - .is_break() -} - -struct IllegalSelfTypeVisitor<'tcx> { - tcx: TyCtxt<'tcx>, - trait_def_id: DefId, - supertraits: Option>>, - allow_self_projections: AllowSelfProjections, -} - -impl<'tcx> TypeVisitor> for IllegalSelfTypeVisitor<'tcx> { - type Result = ControlFlow<()>; - - fn visit_ty(&mut self, t: Ty<'tcx>) -> Self::Result { - match t.kind() { - ty::Param(_) => { - if t == self.tcx.types.self_param { - ControlFlow::Break(()) - } else { - ControlFlow::Continue(()) - } - } - ty::Alias(ty::Projection, ref data) if self.tcx.is_impl_trait_in_trait(data.def_id) => { - // We'll deny these later in their own pass - ControlFlow::Continue(()) - } - ty::Alias(ty::Projection, ref data) => { - match self.allow_self_projections { - AllowSelfProjections::Yes => { - // This is a projected type `::X`. - - // Compute supertraits of current trait lazily. - if self.supertraits.is_none() { - self.supertraits = Some( - util::supertraits( - self.tcx, - ty::Binder::dummy(ty::TraitRef::identity( - self.tcx, - self.trait_def_id, - )), - ) - .map(|trait_ref| { - self.tcx.erase_regions( - self.tcx.instantiate_bound_regions_with_erased(trait_ref), - ) - }) - .collect(), - ); - } - - // Determine whether the trait reference `Foo as - // SomeTrait` is in fact a supertrait of the - // current trait. In that case, this type is - // legal, because the type `X` will be specified - // in the object type. Note that we can just use - // direct equality here because all of these types - // are part of the formal parameter listing, and - // hence there should be no inference variables. - let is_supertrait_of_current_trait = - self.supertraits.as_ref().unwrap().contains( - &data.trait_ref(self.tcx).fold_with( - &mut EraseEscapingBoundRegions { - tcx: self.tcx, - binder: ty::INNERMOST, - }, - ), - ); - - // only walk contained types if it's not a super trait - if is_supertrait_of_current_trait { - ControlFlow::Continue(()) - } else { - t.super_visit_with(self) // POSSIBLY reporting an error - } - } - AllowSelfProjections::No => t.super_visit_with(self), - } - } - _ => t.super_visit_with(self), - } - } - - fn visit_const(&mut self, ct: ty::Const<'tcx>) -> Self::Result { - // Constants can only influence object safety if they are generic and reference `Self`. - // This is only possible for unevaluated constants, so we walk these here. - self.tcx.expand_abstract_consts(ct).super_visit_with(self) - } -} - -struct EraseEscapingBoundRegions<'tcx> { - tcx: TyCtxt<'tcx>, - binder: ty::DebruijnIndex, -} - -impl<'tcx> TypeFolder> for EraseEscapingBoundRegions<'tcx> { - fn cx(&self) -> TyCtxt<'tcx> { - self.tcx - } - - fn fold_binder(&mut self, t: ty::Binder<'tcx, T>) -> ty::Binder<'tcx, T> - where - T: TypeFoldable>, - { - self.binder.shift_in(1); - let result = t.super_fold_with(self); - self.binder.shift_out(1); - result - } - - fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - if let ty::ReBound(debruijn, _) = *r - && debruijn < self.binder - { - r - } else { - self.tcx.lifetimes.re_erased - } - } -} - -fn contains_illegal_impl_trait_in_trait<'tcx>( - tcx: TyCtxt<'tcx>, - fn_def_id: DefId, - ty: ty::Binder<'tcx, Ty<'tcx>>, -) -> Option { - // This would be caught below, but rendering the error as a separate - // `async-specific` message is better. - if tcx.asyncness(fn_def_id).is_async() { - return Some(MethodViolationCode::AsyncFn); - } - - // FIXME(RPITIT): Perhaps we should use a visitor here? - ty.skip_binder().walk().find_map(|arg| { - if let ty::GenericArgKind::Type(ty) = arg.unpack() - && let ty::Alias(ty::Projection, proj) = ty.kind() - && tcx.is_impl_trait_in_trait(proj.def_id) - { - Some(MethodViolationCode::ReferencesImplTraitInTrait(tcx.def_span(proj.def_id))) - } else { - None - } - }) -} - -pub(crate) fn provide(providers: &mut Providers) { - *providers = Providers { - object_safety_violations, - is_object_safe, - generics_require_sized_self, - ..*providers - }; -} diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs index 3d9dc1a8d4d..bab038af9ed 100644 --- a/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs +++ b/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs @@ -113,7 +113,7 @@ pub fn compute_implied_outlives_bounds_inner<'tcx>( | ty::PredicateKind::Subtype(..) | ty::PredicateKind::Coerce(..) | ty::PredicateKind::Clause(ty::ClauseKind::Projection(..)) - | ty::PredicateKind::ObjectSafe(..) + | ty::PredicateKind::DynCompatible(..) | ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..)) | ty::PredicateKind::ConstEquate(..) | ty::PredicateKind::Ambiguous @@ -217,7 +217,7 @@ pub fn compute_implied_outlives_bounds_compat_inner<'tcx>( | ty::PredicateKind::Subtype(..) | ty::PredicateKind::Coerce(..) | ty::PredicateKind::Clause(ty::ClauseKind::Projection(..)) - | ty::PredicateKind::ObjectSafe(..) + | ty::PredicateKind::DynCompatible(..) | ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..)) | ty::PredicateKind::ConstEquate(..) | ty::PredicateKind::Ambiguous diff --git a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs index e5f1d5c36da..084b61115db 100644 --- a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs +++ b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs @@ -883,7 +883,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { if let Some(principal) = data.principal() { if !self.infcx.tcx.features().object_safe_for_dispatch { principal.with_self_ty(self.tcx(), self_ty) - } else if self.tcx().is_object_safe(principal.def_id()) { + } else if self.tcx().is_dyn_compatible(principal.def_id()) { principal.with_self_ty(self.tcx(), self_ty) } else { return; diff --git a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs index d15acd51c86..5141e969608 100644 --- a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs +++ b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs @@ -30,7 +30,7 @@ use crate::traits::util::{self, closure_trait_ref_and_return_type}; use crate::traits::{ ImplDerivedCause, ImplSource, ImplSourceUserDefinedData, Normalized, Obligation, ObligationCause, PolyTraitObligation, PredicateObligation, Selection, SelectionError, - SignatureMismatch, TraitNotObjectSafe, TraitObligation, Unimplemented, + SignatureMismatch, TraitDynIncompatible, TraitObligation, Unimplemented, }; impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { @@ -630,7 +630,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { obligation.cause.span, "GATs in trait object shouldn't have been considered", ); - return Err(SelectionError::TraitNotObjectSafe(trait_predicate.trait_ref.def_id)); + return Err(SelectionError::TraitDynIncompatible(trait_predicate.trait_ref.def_id)); } // This maybe belongs in wf, but that can't (doesn't) handle @@ -1187,11 +1187,11 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { ImplSource::Builtin(BuiltinImplSource::Misc, obligations) } - // `T` -> `Trait` + // `T` -> `dyn Trait` (_, &ty::Dynamic(data, r, ty::Dyn)) => { let mut object_dids = data.auto_traits().chain(data.principal_def_id()); - if let Some(did) = object_dids.find(|did| !tcx.is_object_safe(*did)) { - return Err(TraitNotObjectSafe(did)); + if let Some(did) = object_dids.find(|did| !tcx.is_dyn_compatible(*did)) { + return Err(TraitDynIncompatible(did)); } let predicate_to_obligation = |predicate| { diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs index cbc17a058f6..20b540831aa 100644 --- a/compiler/rustc_trait_selection/src/traits/select/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs @@ -772,8 +772,8 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { Ok(EvaluatedToOkModuloRegions) } - ty::PredicateKind::ObjectSafe(trait_def_id) => { - if self.tcx().is_object_safe(trait_def_id) { + ty::PredicateKind::DynCompatible(trait_def_id) => { + if self.tcx().is_dyn_compatible(trait_def_id) { Ok(EvaluatedToOk) } else { Ok(EvaluatedToErr) diff --git a/compiler/rustc_trait_selection/src/traits/wf.rs b/compiler/rustc_trait_selection/src/traits/wf.rs index 354f3034b8a..7e140ecfee0 100644 --- a/compiler/rustc_trait_selection/src/traits/wf.rs +++ b/compiler/rustc_trait_selection/src/traits/wf.rs @@ -838,7 +838,7 @@ impl<'a, 'tcx> TypeVisitor> for WfPredicates<'a, 'tcx> { self.cause(ObligationCauseCode::WellFormed(None)), self.recursion_depth, self.param_env, - ty::Binder::dummy(ty::PredicateKind::ObjectSafe(principal)), + ty::Binder::dummy(ty::PredicateKind::DynCompatible(principal)), )); } } diff --git a/compiler/rustc_traits/src/normalize_erasing_regions.rs b/compiler/rustc_traits/src/normalize_erasing_regions.rs index c5ebc2d26a7..f01a12b0a00 100644 --- a/compiler/rustc_traits/src/normalize_erasing_regions.rs +++ b/compiler/rustc_traits/src/normalize_erasing_regions.rs @@ -59,7 +59,7 @@ fn not_outlives_predicate(p: ty::Predicate<'_>) -> bool { | ty::PredicateKind::NormalizesTo(..) | ty::PredicateKind::AliasRelate(..) | ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(..)) - | ty::PredicateKind::ObjectSafe(..) + | ty::PredicateKind::DynCompatible(..) | ty::PredicateKind::Subtype(..) | ty::PredicateKind::Coerce(..) | ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..)) diff --git a/compiler/rustc_type_ir/src/interner.rs b/compiler/rustc_type_ir/src/interner.rs index 8dec2133a45..b2ac67efef6 100644 --- a/compiler/rustc_type_ir/src/interner.rs +++ b/compiler/rustc_type_ir/src/interner.rs @@ -255,7 +255,7 @@ pub trait Interner: fn trait_is_alias(self, trait_def_id: Self::DefId) -> bool; - fn trait_is_object_safe(self, trait_def_id: Self::DefId) -> bool; + fn trait_is_dyn_compatible(self, trait_def_id: Self::DefId) -> bool; fn trait_is_fundamental(self, def_id: Self::DefId) -> bool; diff --git a/compiler/rustc_type_ir/src/predicate_kind.rs b/compiler/rustc_type_ir/src/predicate_kind.rs index c8a21028588..a5148a5e6da 100644 --- a/compiler/rustc_type_ir/src/predicate_kind.rs +++ b/compiler/rustc_type_ir/src/predicate_kind.rs @@ -46,8 +46,8 @@ pub enum PredicateKind { /// Prove a clause Clause(ClauseKind), - /// Trait must be object-safe. - ObjectSafe(I::DefId), + /// Trait must be dyn-compatible. + DynCompatible(I::DefId), /// `T1 <: T2` /// @@ -128,8 +128,8 @@ impl fmt::Debug for PredicateKind { PredicateKind::Clause(a) => a.fmt(f), PredicateKind::Subtype(pair) => pair.fmt(f), PredicateKind::Coerce(pair) => pair.fmt(f), - PredicateKind::ObjectSafe(trait_def_id) => { - write!(f, "ObjectSafe({trait_def_id:?})") + PredicateKind::DynCompatible(trait_def_id) => { + write!(f, "DynCompatible({trait_def_id:?})") } PredicateKind::ConstEquate(c1, c2) => write!(f, "ConstEquate({c1:?}, {c2:?})"), PredicateKind::Ambiguous => write!(f, "Ambiguous"), diff --git a/compiler/stable_mir/src/ty.rs b/compiler/stable_mir/src/ty.rs index b3dc4d9bb82..9e6fbc8ea0c 100644 --- a/compiler/stable_mir/src/ty.rs +++ b/compiler/stable_mir/src/ty.rs @@ -1420,7 +1420,7 @@ pub struct GenericPredicates { #[derive(Clone, Debug, Eq, PartialEq, Serialize)] pub enum PredicateKind { Clause(ClauseKind), - ObjectSafe(TraitDef), + DynCompatible(TraitDef), SubType(SubtypePredicate), Coerce(CoercePredicate), ConstEquate(TyConst, TyConst), diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs index 31710bc014a..300745bcbac 100644 --- a/src/librustdoc/clean/types.rs +++ b/src/librustdoc/clean/types.rs @@ -1444,7 +1444,7 @@ impl Trait { tcx.trait_def(self.def_id).safety } pub(crate) fn is_object_safe(&self, tcx: TyCtxt<'_>) -> bool { - tcx.is_object_safe(self.def_id) + tcx.is_dyn_compatible(self.def_id) } } diff --git a/tests/rustdoc-ui/invalid_const_in_lifetime_position.stderr b/tests/rustdoc-ui/invalid_const_in_lifetime_position.stderr index ef551cbea3e..0c3826c5665 100644 --- a/tests/rustdoc-ui/invalid_const_in_lifetime_position.stderr +++ b/tests/rustdoc-ui/invalid_const_in_lifetime_position.stderr @@ -98,7 +98,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn f<'a>(arg : Box = &'a ()>>) {} | ^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/invalid_const_in_lifetime_position.rs:2:10 | LL | trait X { diff --git a/tests/rustdoc-ui/issues/issue-105742.stderr b/tests/rustdoc-ui/issues/issue-105742.stderr index 0f01bc59759..0f09d637f38 100644 --- a/tests/rustdoc-ui/issues/issue-105742.stderr +++ b/tests/rustdoc-ui/issues/issue-105742.stderr @@ -300,7 +300,7 @@ error[E0038]: the trait `SVec` cannot be made into an object LL | pub fn next<'a, T>(s: &'a mut dyn SVec) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `SVec` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-105742.rs:14:17 | LL | pub trait SVec: Index< diff --git a/tests/ui/associated-consts/associated-const-in-trait.stderr b/tests/ui/associated-consts/associated-const-in-trait.stderr index 88360cd2dd5..b40c1005797 100644 --- a/tests/ui/associated-consts/associated-const-in-trait.stderr +++ b/tests/ui/associated-consts/associated-const-in-trait.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | impl dyn Trait { | ^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/associated-const-in-trait.rs:4:11 | LL | trait Trait { @@ -19,7 +19,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | const fn n() -> usize { Self::N } | ^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/associated-const-in-trait.rs:4:11 | LL | trait Trait { diff --git a/tests/ui/associated-item/issue-48027.stderr b/tests/ui/associated-item/issue-48027.stderr index 45ea419336b..2883259ce2f 100644 --- a/tests/ui/associated-item/issue-48027.stderr +++ b/tests/ui/associated-item/issue-48027.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | impl dyn Bar {} | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-48027.rs:2:11 | LL | trait Bar { diff --git a/tests/ui/associated-type-bounds/suggest-assoc-ty-bound-on-eq-bound.stderr b/tests/ui/associated-type-bounds/suggest-assoc-ty-bound-on-eq-bound.stderr index 13be2162c52..bec60187e42 100644 --- a/tests/ui/associated-type-bounds/suggest-assoc-ty-bound-on-eq-bound.stderr +++ b/tests/ui/associated-type-bounds/suggest-assoc-ty-bound-on-eq-bound.stderr @@ -5,7 +5,7 @@ LL | fn f(_: impl Trait) {} | ^^^^^^^^ `Copy` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit error[E0225]: only auto traits can be used as additional traits in a trait object --> $DIR/suggest-assoc-ty-bound-on-eq-bound.rs:10:42 @@ -24,7 +24,7 @@ error[E0038]: the trait `Eq` cannot be made into an object LL | fn g(_: impl Trait) {} | ^^^^^^^^^^^^^^^^^^^^ `Eq` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/cmp.rs:LL:COL | = note: the trait cannot be made into an object because it uses `Self` as a type parameter diff --git a/tests/ui/async-await/async-fn/dyn-pos.stderr b/tests/ui/async-await/async-fn/dyn-pos.stderr index 3bef5a27897..78e915d49e7 100644 --- a/tests/ui/async-await/async-fn/dyn-pos.stderr +++ b/tests/ui/async-await/async-fn/dyn-pos.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `AsyncFnMut` cannot be made into an object LL | fn foo(x: &dyn async Fn()) {} | ^^^^^^^^^^ `AsyncFnMut` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/ops/async_function.rs:LL:COL | = note: the trait cannot be made into an object because it contains the generic associated type `CallRefFuture` @@ -19,7 +19,7 @@ error[E0038]: the trait `AsyncFnMut` cannot be made into an object LL | fn foo(x: &dyn async Fn()) {} | ^^^^^^^^^^ `AsyncFnMut` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/ops/async_function.rs:LL:COL | = note: the trait cannot be made into an object because it contains the generic associated type `CallRefFuture` @@ -35,7 +35,7 @@ error[E0038]: the trait `AsyncFnMut` cannot be made into an object LL | fn foo(x: &dyn async Fn()) {} | ^^^^^^^^^^ `AsyncFnMut` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/ops/async_function.rs:LL:COL | = note: the trait cannot be made into an object because it contains the generic associated type `CallRefFuture` @@ -51,7 +51,7 @@ error[E0038]: the trait `AsyncFn` cannot be made into an object LL | fn foo(x: &dyn async Fn()) {} | ^^^^^^^^^^^^^^ `AsyncFn` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/ops/async_function.rs:LL:COL | = note: the trait cannot be made into an object because it contains the generic associated type `CallRefFuture` diff --git a/tests/ui/async-await/in-trait/object-safety.stderr b/tests/ui/async-await/in-trait/object-safety.stderr index f45e6a2c8bb..8e73abab933 100644 --- a/tests/ui/async-await/in-trait/object-safety.stderr +++ b/tests/ui/async-await/in-trait/object-safety.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let x: &dyn Foo = todo!(); | ^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety.rs:5:14 | LL | trait Foo { diff --git a/tests/ui/async-await/inference_var_self_argument.stderr b/tests/ui/async-await/inference_var_self_argument.stderr index f94ae2a27c3..7bfa9be66dd 100644 --- a/tests/ui/async-await/inference_var_self_argument.stderr +++ b/tests/ui/async-await/inference_var_self_argument.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | async fn foo(self: &dyn Foo) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/inference_var_self_argument.rs:5:14 | LL | trait Foo { diff --git a/tests/ui/coherence/coherence-impl-trait-for-trait-object-safe.stderr b/tests/ui/coherence/coherence-impl-trait-for-trait-object-safe.stderr index 1dcc30ee652..ce65e079ab4 100644 --- a/tests/ui/coherence/coherence-impl-trait-for-trait-object-safe.stderr +++ b/tests/ui/coherence/coherence-impl-trait-for-trait-object-safe.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `NotObjectSafe` cannot be made into an object LL | impl NotObjectSafe for dyn NotObjectSafe { } | ^^^^^^^^^^^^^^^^^ `NotObjectSafe` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/coherence-impl-trait-for-trait-object-safe.rs:6:43 | LL | trait NotObjectSafe { fn eq(&self, other: Self); } diff --git a/tests/ui/const-generics/adt_const_params/const_param_ty_object_safety.stderr b/tests/ui/const-generics/adt_const_params/const_param_ty_object_safety.stderr index ba38f63d5df..831b40887ac 100644 --- a/tests/ui/const-generics/adt_const_params/const_param_ty_object_safety.stderr +++ b/tests/ui/const-generics/adt_const_params/const_param_ty_object_safety.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `ConstParamTy_` cannot be made into an object LL | fn foo(a: &dyn ConstParamTy_) {} | ^^^^^^^^^^^^^^^^^ `ConstParamTy_` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/cmp.rs:LL:COL | = note: the trait cannot be made into an object because it uses `Self` as a type parameter @@ -19,7 +19,7 @@ error[E0038]: the trait `UnsizedConstParamTy` cannot be made into an object LL | fn bar(a: &dyn UnsizedConstParamTy) {} | ^^^^^^^^^^^^^^^^^^^^^^^ `UnsizedConstParamTy` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/cmp.rs:LL:COL | = note: the trait cannot be made into an object because it uses `Self` as a type parameter diff --git a/tests/ui/const-generics/generic_const_exprs/issue-102768.stderr b/tests/ui/const-generics/generic_const_exprs/issue-102768.stderr index 37e09a075fe..9a75f372879 100644 --- a/tests/ui/const-generics/generic_const_exprs/issue-102768.stderr +++ b/tests/ui/const-generics/generic_const_exprs/issue-102768.stderr @@ -98,7 +98,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn f2<'a>(arg: Box = &'a ()>>) {} | ^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-102768.rs:5:10 | LL | trait X { diff --git a/tests/ui/const-generics/generic_const_exprs/object-safety-err-ret.stderr b/tests/ui/const-generics/generic_const_exprs/object-safety-err-ret.stderr index 31f271cc7ba..fb57da42bb2 100644 --- a/tests/ui/const-generics/generic_const_exprs/object-safety-err-ret.stderr +++ b/tests/ui/const-generics/generic_const_exprs/object-safety-err-ret.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn use_dyn(v: &dyn Foo) { | ^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-err-ret.rs:8:8 | LL | trait Foo { @@ -22,7 +22,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | v.test(); | ^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-err-ret.rs:8:8 | LL | trait Foo { diff --git a/tests/ui/const-generics/generic_const_exprs/object-safety-err-where-bounds.stderr b/tests/ui/const-generics/generic_const_exprs/object-safety-err-where-bounds.stderr index fde5d3ce772..831bda71295 100644 --- a/tests/ui/const-generics/generic_const_exprs/object-safety-err-where-bounds.stderr +++ b/tests/ui/const-generics/generic_const_exprs/object-safety-err-where-bounds.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn use_dyn(v: &dyn Foo) { | ^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-err-where-bounds.rs:8:8 | LL | trait Foo { @@ -20,7 +20,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | v.test(); | ^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-err-where-bounds.rs:8:8 | LL | trait Foo { diff --git a/tests/ui/const-generics/not_wf_param_in_rpitit.stderr b/tests/ui/const-generics/not_wf_param_in_rpitit.stderr index 9095948d22b..82e251f1306 100644 --- a/tests/ui/const-generics/not_wf_param_in_rpitit.stderr +++ b/tests/ui/const-generics/not_wf_param_in_rpitit.stderr @@ -24,7 +24,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | trait Trait { | ^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/not_wf_param_in_rpitit.rs:11:14 | LL | trait Trait { @@ -47,7 +47,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | trait Trait { | ^^^^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/not_wf_param_in_rpitit.rs:11:14 | LL | trait Trait { @@ -78,7 +78,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | trait Trait { | ^^^^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/not_wf_param_in_rpitit.rs:11:14 | LL | trait Trait { diff --git a/tests/ui/consts/const_refs_to_static-ice-121413.rs b/tests/ui/consts/const_refs_to_static-ice-121413.rs index 8fc3912efd0..5afe80d9f8d 100644 --- a/tests/ui/consts/const_refs_to_static-ice-121413.rs +++ b/tests/ui/consts/const_refs_to_static-ice-121413.rs @@ -12,7 +12,7 @@ const REF_INTERIOR_MUT: &usize = { //~| ERROR the size for values of type `(dyn Sync + 'static)` cannot be known at compilation time //~| ERROR the size for values of type `(dyn Sync + 'static)` cannot be known at compilation time //~| WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! - //~| HELP if this is an object-safe trait, use `dyn` + //~| HELP if this is a dyn-compatible trait, use `dyn` //~| HELP the trait `Sized` is not implemented for `(dyn Sync + 'static)` //~| HELP the trait `Sized` is not implemented for `(dyn Sync + 'static)` unsafe { &*(&FOO as *const _ as *const usize) } diff --git a/tests/ui/consts/const_refs_to_static-ice-121413.stderr b/tests/ui/consts/const_refs_to_static-ice-121413.stderr index fbe32a70293..48e6ee33346 100644 --- a/tests/ui/consts/const_refs_to_static-ice-121413.stderr +++ b/tests/ui/consts/const_refs_to_static-ice-121413.stderr @@ -18,7 +18,7 @@ LL | static FOO: Sync = AtomicUsize::new(0); = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | static FOO: dyn Sync = AtomicUsize::new(0); | +++ diff --git a/tests/ui/did_you_mean/bad-assoc-ty.stderr b/tests/ui/did_you_mean/bad-assoc-ty.stderr index b349332bcb9..41039ae82a6 100644 --- a/tests/ui/did_you_mean/bad-assoc-ty.stderr +++ b/tests/ui/did_you_mean/bad-assoc-ty.stderr @@ -182,7 +182,7 @@ LL | type H = Fn(u8) -> (u8)::Output; = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | type H = (u8)>::Output; | ++++ + diff --git a/tests/ui/did_you_mean/trait-object-reference-without-parens-suggestion.stderr b/tests/ui/did_you_mean/trait-object-reference-without-parens-suggestion.stderr index a33a8c776c8..8ef0d178444 100644 --- a/tests/ui/did_you_mean/trait-object-reference-without-parens-suggestion.stderr +++ b/tests/ui/did_you_mean/trait-object-reference-without-parens-suggestion.stderr @@ -27,7 +27,7 @@ LL | let _: &Copy + 'static; | ^^^^^ `Copy` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit error: aborting due to 3 previous errors diff --git a/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr b/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr index 711bfa188ec..b930815d13b 100644 --- a/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr +++ b/tests/ui/dyn-keyword/dyn-2018-edition-lint.stderr @@ -11,7 +11,7 @@ note: the lint level is defined here | LL | #[deny(bare_trait_objects)] | ^^^^^^^^^^^^^^^^^^ -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn function(x: &dyn SomeTrait, y: Box) { | +++ @@ -24,7 +24,7 @@ LL | fn function(x: &SomeTrait, y: Box) { | = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn function(x: &SomeTrait, y: Box) { | +++ @@ -37,7 +37,7 @@ LL | let _x: &SomeTrait = todo!(); | = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let _x: &dyn SomeTrait = todo!(); | +++ diff --git a/tests/ui/dyn-keyword/dyn-angle-brackets.stderr b/tests/ui/dyn-keyword/dyn-angle-brackets.stderr index 41298cc73c8..6a29dab0486 100644 --- a/tests/ui/dyn-keyword/dyn-angle-brackets.stderr +++ b/tests/ui/dyn-keyword/dyn-angle-brackets.stderr @@ -11,7 +11,7 @@ note: the lint level is defined here | LL | #![deny(bare_trait_objects)] | ^^^^^^^^^^^^^^^^^^ -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | ::fmt(self, f) | +++ diff --git a/tests/ui/error-codes/E0038.stderr b/tests/ui/error-codes/E0038.stderr index 6e8eaab8ddf..54b489c655f 100644 --- a/tests/ui/error-codes/E0038.stderr +++ b/tests/ui/error-codes/E0038.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | fn call_foo(x: Box) { | ^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/E0038.rs:2:22 | LL | trait Trait { @@ -19,7 +19,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | let y = x.foo(); | ^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/E0038.rs:2:22 | LL | trait Trait { diff --git a/tests/ui/errors/dynless-turbofish-e0191-issue-91997.stderr b/tests/ui/errors/dynless-turbofish-e0191-issue-91997.stderr index 68d8adc5a40..24f00cfa6be 100644 --- a/tests/ui/errors/dynless-turbofish-e0191-issue-91997.stderr +++ b/tests/ui/errors/dynless-turbofish-e0191-issue-91997.stderr @@ -7,7 +7,7 @@ LL | let _ = MyIterator::next; = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let _ = ::next; | ++++ + diff --git a/tests/ui/feature-gates/feature-gate-dispatch-from-dyn-missing-impl.stderr b/tests/ui/feature-gates/feature-gate-dispatch-from-dyn-missing-impl.stderr index 00b8c0eef98..28caaf8356f 100644 --- a/tests/ui/feature-gates/feature-gate-dispatch-from-dyn-missing-impl.stderr +++ b/tests/ui/feature-gates/feature-gate-dispatch-from-dyn-missing-impl.stderr @@ -7,7 +7,7 @@ LL | fn ptr(self: Ptr); LL | Ptr(Box::new(4)) as Ptr; | ^^^^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/feature-gate-dispatch-from-dyn-missing-impl.rs:25:18 | LL | trait Trait { @@ -25,7 +25,7 @@ LL | fn ptr(self: Ptr); LL | Ptr(Box::new(4)) as Ptr; | ^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/feature-gate-dispatch-from-dyn-missing-impl.rs:25:18 | LL | trait Trait { diff --git a/tests/ui/feature-gates/feature-gate-object_safe_for_dispatch.stderr b/tests/ui/feature-gates/feature-gate-object_safe_for_dispatch.stderr index d76c697fe73..fd5ed9c40f7 100644 --- a/tests/ui/feature-gates/feature-gate-object_safe_for_dispatch.stderr +++ b/tests/ui/feature-gates/feature-gate-object_safe_for_dispatch.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `NonObjectSafe1` cannot be made into an object LL | fn takes_non_object_safe_ref(obj: &dyn NonObjectSafe1) { | ^^^^^^^^^^^^^^^^^^ `NonObjectSafe1` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/feature-gate-object_safe_for_dispatch.rs:4:23 | LL | trait NonObjectSafe1: Sized {} @@ -18,7 +18,7 @@ error[E0038]: the trait `NonObjectSafe2` cannot be made into an object LL | fn return_non_object_safe_ref() -> &'static dyn NonObjectSafe2 { | ^^^^^^^^^^^^^^^^^^ `NonObjectSafe2` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/feature-gate-object_safe_for_dispatch.rs:7:8 | LL | trait NonObjectSafe2 { @@ -40,7 +40,7 @@ error[E0038]: the trait `NonObjectSafe3` cannot be made into an object LL | fn takes_non_object_safe_box(obj: Box) { | ^^^^^^^^^^^^^^^^^^ `NonObjectSafe3` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/feature-gate-object_safe_for_dispatch.rs:11:8 | LL | trait NonObjectSafe3 { @@ -55,7 +55,7 @@ error[E0038]: the trait `NonObjectSafe4` cannot be made into an object LL | fn return_non_object_safe_rc() -> std::rc::Rc { | ^^^^^^^^^^^^^^^^^^ `NonObjectSafe4` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/feature-gate-object_safe_for_dispatch.rs:15:22 | LL | trait NonObjectSafe4 { @@ -70,7 +70,7 @@ error[E0038]: the trait `NonObjectSafe1` cannot be made into an object LL | impl Trait for dyn NonObjectSafe1 {} | ^^^^^^^^^^^^^^^^^^ `NonObjectSafe1` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/feature-gate-object_safe_for_dispatch.rs:4:23 | LL | trait NonObjectSafe1: Sized {} diff --git a/tests/ui/generic-associated-types/gat-in-trait-path-undeclared-lifetime.stderr b/tests/ui/generic-associated-types/gat-in-trait-path-undeclared-lifetime.stderr index 4a56b20eb59..867f55b0dee 100644 --- a/tests/ui/generic-associated-types/gat-in-trait-path-undeclared-lifetime.stderr +++ b/tests/ui/generic-associated-types/gat-in-trait-path-undeclared-lifetime.stderr @@ -42,7 +42,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn _f(arg : Box X = &'a [u32]>>) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/gat-in-trait-path-undeclared-lifetime.rs:2:8 | LL | trait X { diff --git a/tests/ui/generic-associated-types/gat-in-trait-path.base.stderr b/tests/ui/generic-associated-types/gat-in-trait-path.base.stderr index 37491ca12b0..34642f8fdc6 100644 --- a/tests/ui/generic-associated-types/gat-in-trait-path.base.stderr +++ b/tests/ui/generic-associated-types/gat-in-trait-path.base.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn f(_arg : Box Foo = &'a ()>>) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/gat-in-trait-path.rs:10:10 | LL | trait Foo { @@ -22,7 +22,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | f(Box::new(foo)); | ^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/gat-in-trait-path.rs:10:10 | LL | trait Foo { @@ -40,7 +40,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | f(Box::new(foo)); | ^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/gat-in-trait-path.rs:10:10 | LL | trait Foo { diff --git a/tests/ui/generic-associated-types/gat-trait-path-parenthesised-args.stderr b/tests/ui/generic-associated-types/gat-trait-path-parenthesised-args.stderr index 9d8e91c02ca..97b7019b385 100644 --- a/tests/ui/generic-associated-types/gat-trait-path-parenthesised-args.stderr +++ b/tests/ui/generic-associated-types/gat-trait-path-parenthesised-args.stderr @@ -129,7 +129,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn foo<'a>(arg: Box>) {} | ^^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/gat-trait-path-parenthesised-args.rs:2:8 | LL | trait X { @@ -194,7 +194,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn bar<'a>(arg: Box>) {} | ^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/gat-trait-path-parenthesised-args.rs:2:8 | LL | trait X { diff --git a/tests/ui/generic-associated-types/issue-67510-pass.base.stderr b/tests/ui/generic-associated-types/issue-67510-pass.base.stderr index f39d0055428..cac8010018e 100644 --- a/tests/ui/generic-associated-types/issue-67510-pass.base.stderr +++ b/tests/ui/generic-associated-types/issue-67510-pass.base.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn _func1<'a>(_x: Box=&'a ()>>) {} | ^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-67510-pass.rs:9:10 | LL | trait X { diff --git a/tests/ui/generic-associated-types/issue-67510.stderr b/tests/ui/generic-associated-types/issue-67510.stderr index d25c5b0f387..416f04ac2fd 100644 --- a/tests/ui/generic-associated-types/issue-67510.stderr +++ b/tests/ui/generic-associated-types/issue-67510.stderr @@ -35,7 +35,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn f(x: Box = &'a ()>>) {} | ^^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-67510.rs:2:10 | LL | trait X { diff --git a/tests/ui/generic-associated-types/issue-71176.stderr b/tests/ui/generic-associated-types/issue-71176.stderr index 9f83c162c02..15d5a3df6f2 100644 --- a/tests/ui/generic-associated-types/issue-71176.stderr +++ b/tests/ui/generic-associated-types/issue-71176.stderr @@ -54,7 +54,7 @@ error[E0038]: the trait `Provider` cannot be made into an object LL | inner: Box>, | ^^^^^^^^^^^^^^^^^^^ `Provider` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-71176.rs:2:10 | LL | trait Provider { @@ -70,7 +70,7 @@ error[E0038]: the trait `Provider` cannot be made into an object LL | inner: Box::new(()), | ^^^^^^^^^^^^ `Provider` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-71176.rs:2:10 | LL | trait Provider { diff --git a/tests/ui/generic-associated-types/issue-76535.base.stderr b/tests/ui/generic-associated-types/issue-76535.base.stderr index 88c08051da7..a44c8dc51e7 100644 --- a/tests/ui/generic-associated-types/issue-76535.base.stderr +++ b/tests/ui/generic-associated-types/issue-76535.base.stderr @@ -20,7 +20,7 @@ error[E0038]: the trait `SuperTrait` cannot be made into an object LL | let sub: Box> = Box::new(SuperStruct::new(0)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `SuperTrait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-76535.rs:9:10 | LL | pub trait SuperTrait { @@ -37,7 +37,7 @@ error[E0038]: the trait `SuperTrait` cannot be made into an object LL | let sub: Box> = Box::new(SuperStruct::new(0)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `SuperTrait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-76535.rs:9:10 | LL | pub trait SuperTrait { diff --git a/tests/ui/generic-associated-types/issue-78671.base.stderr b/tests/ui/generic-associated-types/issue-78671.base.stderr index bad8c1c9dba..9f2be785460 100644 --- a/tests/ui/generic-associated-types/issue-78671.base.stderr +++ b/tests/ui/generic-associated-types/issue-78671.base.stderr @@ -20,7 +20,7 @@ error[E0038]: the trait `CollectionFamily` cannot be made into an object LL | Box::new(Family) as &dyn CollectionFamily | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `CollectionFamily` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-78671.rs:7:10 | LL | trait CollectionFamily { diff --git a/tests/ui/generic-associated-types/issue-79422.base.stderr b/tests/ui/generic-associated-types/issue-79422.base.stderr index 551ad2a8fdf..3ea62bdbb27 100644 --- a/tests/ui/generic-associated-types/issue-79422.base.stderr +++ b/tests/ui/generic-associated-types/issue-79422.base.stderr @@ -20,7 +20,7 @@ error[E0038]: the trait `MapLike` cannot be made into an object LL | as Box>>; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `MapLike` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-79422.rs:23:10 | LL | trait MapLike { @@ -38,7 +38,7 @@ error[E0038]: the trait `MapLike` cannot be made into an object LL | let m = Box::new(std::collections::BTreeMap::::new()) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `MapLike` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-79422.rs:23:10 | LL | trait MapLike { diff --git a/tests/ui/generic-associated-types/missing_lifetime_args.stderr b/tests/ui/generic-associated-types/missing_lifetime_args.stderr index 18c2d8c7eed..61cf4f3dd4a 100644 --- a/tests/ui/generic-associated-types/missing_lifetime_args.stderr +++ b/tests/ui/generic-associated-types/missing_lifetime_args.stderr @@ -54,7 +54,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn foo<'c, 'd>(_arg: Box>) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/missing_lifetime_args.rs:2:10 | LL | trait X { diff --git a/tests/ui/generic-associated-types/parse/trait-path-type-error-once-implemented.stderr b/tests/ui/generic-associated-types/parse/trait-path-type-error-once-implemented.stderr index 539b6695e9e..91f0f7b3fcf 100644 --- a/tests/ui/generic-associated-types/parse/trait-path-type-error-once-implemented.stderr +++ b/tests/ui/generic-associated-types/parse/trait-path-type-error-once-implemented.stderr @@ -98,7 +98,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn f2<'a>(arg : Box = &'a ()>>) {} | ^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/trait-path-type-error-once-implemented.rs:2:10 | LL | trait X { diff --git a/tests/ui/generic-associated-types/trait-objects.base.stderr b/tests/ui/generic-associated-types/trait-objects.base.stderr index 2b5060289ab..0b5a9b9f7fb 100644 --- a/tests/ui/generic-associated-types/trait-objects.base.stderr +++ b/tests/ui/generic-associated-types/trait-objects.base.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `StreamingIterator` cannot be made into an object LL | fn min_size(x: &mut dyn for<'a> StreamingIterator = &'a i32>) -> usize { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `StreamingIterator` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/trait-objects.rs:7:10 | LL | trait StreamingIterator { @@ -19,7 +19,7 @@ error[E0038]: the trait `StreamingIterator` cannot be made into an object LL | x.size_hint().0 | ^^^^^^^^^ `StreamingIterator` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/trait-objects.rs:7:10 | LL | trait StreamingIterator { @@ -34,7 +34,7 @@ error[E0038]: the trait `StreamingIterator` cannot be made into an object LL | x.size_hint().0 | ^^^^^^^^^^^^^ `StreamingIterator` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/trait-objects.rs:7:10 | LL | trait StreamingIterator { diff --git a/tests/ui/higher-ranked/trait-bounds/span-bug-issue-121597.stderr b/tests/ui/higher-ranked/trait-bounds/span-bug-issue-121597.stderr index 27f82563aae..d48bf8a471d 100644 --- a/tests/ui/higher-ranked/trait-bounds/span-bug-issue-121597.stderr +++ b/tests/ui/higher-ranked/trait-bounds/span-bug-issue-121597.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let x: &dyn Foo = &(); | ^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/span-bug-issue-121597.rs:4:12 | LL | trait Foo: for Bar {} @@ -19,7 +19,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let x: &dyn Foo = &(); | ^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/span-bug-issue-121597.rs:4:12 | LL | trait Foo: for Bar {} diff --git a/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr b/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr index d82b2c0f606..418f9acf589 100644 --- a/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr +++ b/tests/ui/impl-trait/fresh-lifetime-from-bare-trait-obj-114664.stderr @@ -7,7 +7,7 @@ LL | fn ice() -> impl AsRef { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn ice() -> impl AsRef { | +++ @@ -21,7 +21,7 @@ LL | fn ice() -> impl AsRef { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn ice() -> impl AsRef { | +++ diff --git a/tests/ui/impl-trait/in-trait/cycle-effective-visibilities-during-object-safety.stderr b/tests/ui/impl-trait/in-trait/cycle-effective-visibilities-during-object-safety.stderr index 90285d512ef..af624e2a758 100644 --- a/tests/ui/impl-trait/in-trait/cycle-effective-visibilities-during-object-safety.stderr +++ b/tests/ui/impl-trait/in-trait/cycle-effective-visibilities-during-object-safety.stderr @@ -14,7 +14,7 @@ error[E0038]: the trait `MyTrait` cannot be made into an object LL | MyTrait::foo(&self) | ^^^^^^^^^^^^ `MyTrait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/cycle-effective-visibilities-during-object-safety.rs:5:22 | LL | trait MyTrait { @@ -38,7 +38,7 @@ error[E0038]: the trait `MyTrait` cannot be made into an object LL | impl dyn MyTrait { | ^^^^^^^^^^^ `MyTrait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/cycle-effective-visibilities-during-object-safety.rs:5:22 | LL | trait MyTrait { @@ -54,7 +54,7 @@ error[E0038]: the trait `MyTrait` cannot be made into an object LL | fn other(&self) -> impl Marker { | ^^^^ `MyTrait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/cycle-effective-visibilities-during-object-safety.rs:5:22 | LL | trait MyTrait { diff --git a/tests/ui/impl-trait/in-trait/foreign-dyn-error.stderr b/tests/ui/impl-trait/in-trait/foreign-dyn-error.stderr index a0840699268..895d8686742 100644 --- a/tests/ui/impl-trait/in-trait/foreign-dyn-error.stderr +++ b/tests/ui/impl-trait/in-trait/foreign-dyn-error.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let _: &dyn rpitit::Foo = todo!(); | ^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/auxiliary/rpitit.rs:4:21 | LL | fn bar(self) -> impl Deref; diff --git a/tests/ui/impl-trait/in-trait/object-safety.stderr b/tests/ui/impl-trait/in-trait/object-safety.stderr index a7be0516cd3..e2f23bca621 100644 --- a/tests/ui/impl-trait/in-trait/object-safety.stderr +++ b/tests/ui/impl-trait/in-trait/object-safety.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let i = Box::new(42_u32) as Box; | ^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety.rs:4:22 | LL | trait Foo { @@ -20,7 +20,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let s = i.baz(); | ^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety.rs:4:22 | LL | trait Foo { @@ -36,7 +36,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let s = i.baz(); | ^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety.rs:4:22 | LL | trait Foo { @@ -52,7 +52,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let i = Box::new(42_u32) as Box; | ^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety.rs:4:22 | LL | trait Foo { diff --git a/tests/ui/impl-trait/object-unsafe-trait-in-return-position-dyn-trait.stderr b/tests/ui/impl-trait/object-unsafe-trait-in-return-position-dyn-trait.stderr index 09a689e6396..2a36824e292 100644 --- a/tests/ui/impl-trait/object-unsafe-trait-in-return-position-dyn-trait.stderr +++ b/tests/ui/impl-trait/object-unsafe-trait-in-return-position-dyn-trait.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `NotObjectSafe` cannot be made into an object LL | fn car() -> dyn NotObjectSafe { | ^^^^^^^^^^^^^^^^^ `NotObjectSafe` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:3:8 | LL | trait NotObjectSafe { @@ -29,7 +29,7 @@ error[E0038]: the trait `NotObjectSafe` cannot be made into an object LL | fn cat() -> Box { | ^^^^^^^^^^^^^^^^^ `NotObjectSafe` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:3:8 | LL | trait NotObjectSafe { @@ -71,7 +71,7 @@ error[E0038]: the trait `NotObjectSafe` cannot be made into an object LL | return Box::new(A); | ^^^^^^^^^^^ `NotObjectSafe` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:3:8 | LL | trait NotObjectSafe { @@ -97,7 +97,7 @@ error[E0038]: the trait `NotObjectSafe` cannot be made into an object LL | Box::new(B) | ^^^^^^^^^^^ `NotObjectSafe` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:3:8 | LL | trait NotObjectSafe { diff --git a/tests/ui/issues/issue-18959.stderr b/tests/ui/issues/issue-18959.stderr index 83d46f0331c..5bb452250aa 100644 --- a/tests/ui/issues/issue-18959.stderr +++ b/tests/ui/issues/issue-18959.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | fn foo(b: &dyn Bar) { | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-18959.rs:1:20 | LL | pub trait Foo { fn foo(&self, ext_thing: &T); } @@ -19,7 +19,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | b.foo(&0) | ^^^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-18959.rs:1:20 | LL | pub trait Foo { fn foo(&self, ext_thing: &T); } @@ -34,7 +34,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | let test: &dyn Bar = &mut thing; | ^^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-18959.rs:1:20 | LL | pub trait Foo { fn foo(&self, ext_thing: &T); } @@ -49,7 +49,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | let test: &dyn Bar = &mut thing; | ^^^^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-18959.rs:1:20 | LL | pub trait Foo { fn foo(&self, ext_thing: &T); } @@ -65,7 +65,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | foo(test); | ^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-18959.rs:1:20 | LL | pub trait Foo { fn foo(&self, ext_thing: &T); } diff --git a/tests/ui/issues/issue-19380.stderr b/tests/ui/issues/issue-19380.stderr index 1d7aa6bd459..afbe67befa1 100644 --- a/tests/ui/issues/issue-19380.stderr +++ b/tests/ui/issues/issue-19380.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Qiz` cannot be made into an object LL | foos: &'static [&'static (dyn Qiz + 'static)] | ^^^^^^^^^^^^^^^^^ `Qiz` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-19380.rs:2:6 | LL | trait Qiz { @@ -27,7 +27,7 @@ error[E0038]: the trait `Qiz` cannot be made into an object LL | const BAR : Bar = Bar { foos: &[&FOO]}; | ^^^^ `Qiz` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-19380.rs:2:6 | LL | trait Qiz { @@ -51,7 +51,7 @@ error[E0038]: the trait `Qiz` cannot be made into an object LL | const BAR : Bar = Bar { foos: &[&FOO]}; | ^^^^^^^ `Qiz` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-19380.rs:2:6 | LL | trait Qiz { diff --git a/tests/ui/issues/issue-26056.stderr b/tests/ui/issues/issue-26056.stderr index f1f553adf0f..be5453ec19d 100644 --- a/tests/ui/issues/issue-26056.stderr +++ b/tests/ui/issues/issue-26056.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Map` cannot be made into an object LL | as &dyn Map; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Map` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-26056.rs:9:12 | LL | trait Map: MapLookup<::Key> { diff --git a/tests/ui/issues/issue-28344.stderr b/tests/ui/issues/issue-28344.stderr index b7e0790f679..261f8b67b52 100644 --- a/tests/ui/issues/issue-28344.stderr +++ b/tests/ui/issues/issue-28344.stderr @@ -7,7 +7,7 @@ LL | let x: u8 = BitXor::bitor(0 as u8, 0 as u8); = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let x: u8 = ::bitor(0 as u8, 0 as u8); | ++++ + @@ -35,7 +35,7 @@ LL | let g = BitXor::bitor; | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let g = ::bitor; | ++++ + diff --git a/tests/ui/issues/issue-34373.stderr b/tests/ui/issues/issue-34373.stderr index 784fe935bf8..4e8e7c61fee 100644 --- a/tests/ui/issues/issue-34373.stderr +++ b/tests/ui/issues/issue-34373.stderr @@ -23,7 +23,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | pub struct Foo>>; | ^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-34373.rs:4:8 | LL | trait Trait { diff --git a/tests/ui/issues/issue-50781.stderr b/tests/ui/issues/issue-50781.stderr index 6b0b42ca53a..3e54a53aa95 100644 --- a/tests/ui/issues/issue-50781.stderr +++ b/tests/ui/issues/issue-50781.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | impl Trait for dyn X {} | ^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-50781.rs:4:8 | LL | trait X { @@ -20,7 +20,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | ::foo(&()); | ^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-50781.rs:4:8 | LL | trait X { @@ -37,7 +37,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | ::foo(&()); | ^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-50781.rs:4:8 | LL | trait X { diff --git a/tests/ui/issues/issue-58734.stderr b/tests/ui/issues/issue-58734.stderr index 71581e96844..a2acd9dcf81 100644 --- a/tests/ui/issues/issue-58734.stderr +++ b/tests/ui/issues/issue-58734.stderr @@ -7,7 +7,7 @@ LL | Trait::nonexistent(()); = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | ::nonexistent(()); | ++++ + diff --git a/tests/ui/issues/issue-86756.stderr b/tests/ui/issues/issue-86756.stderr index d0906a6fa74..728d7ea7095 100644 --- a/tests/ui/issues/issue-86756.stderr +++ b/tests/ui/issues/issue-86756.stderr @@ -21,7 +21,7 @@ LL | eq:: = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | eq:: | +++ diff --git a/tests/ui/kindck/kindck-inherited-copy-bound.curr.stderr b/tests/ui/kindck/kindck-inherited-copy-bound.curr.stderr index 979525ff407..e797ca01f4b 100644 --- a/tests/ui/kindck/kindck-inherited-copy-bound.curr.stderr +++ b/tests/ui/kindck/kindck-inherited-copy-bound.curr.stderr @@ -25,7 +25,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let z = &x as &dyn Foo; | ^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/kindck-inherited-copy-bound.rs:10:13 | LL | trait Foo : Copy { @@ -39,7 +39,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let z = &x as &dyn Foo; | ^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/kindck-inherited-copy-bound.rs:10:13 | LL | trait Foo : Copy { diff --git a/tests/ui/kindck/kindck-inherited-copy-bound.object_safe_for_dispatch.stderr b/tests/ui/kindck/kindck-inherited-copy-bound.object_safe_for_dispatch.stderr index 30f90b88160..b4424f4750e 100644 --- a/tests/ui/kindck/kindck-inherited-copy-bound.object_safe_for_dispatch.stderr +++ b/tests/ui/kindck/kindck-inherited-copy-bound.object_safe_for_dispatch.stderr @@ -25,7 +25,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let z = &x as &dyn Foo; | ^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/kindck-inherited-copy-bound.rs:10:13 | LL | trait Foo : Copy { diff --git a/tests/ui/lint/bare-trait-objects-path.stderr b/tests/ui/lint/bare-trait-objects-path.stderr index da1d9f248a0..d2d139dd025 100644 --- a/tests/ui/lint/bare-trait-objects-path.stderr +++ b/tests/ui/lint/bare-trait-objects-path.stderr @@ -7,7 +7,7 @@ LL | let _: Dyn::Ty; = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let _: ::Ty; | ++++ + @@ -26,7 +26,7 @@ LL | Dyn::func(); | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | ::func(); | ++++ + @@ -39,7 +39,7 @@ LL | ::Dyn::func(); | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | ::func(); | ++++++ ++ @@ -52,7 +52,7 @@ LL | Dyn::CONST; | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | ::CONST; | ++++ + diff --git a/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr b/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr index 388dc6160cb..a1aa29dd697 100644 --- a/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr +++ b/tests/ui/lint/force-warn/allowed-group-warn-by-default-lint.stderr @@ -7,7 +7,7 @@ LL | pub fn function(_x: Box) {} = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: requested on the command line with `--force-warn bare-trait-objects` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | pub fn function(_x: Box) {} | +++ diff --git a/tests/ui/lint/force-warn/cap-lints-allow.stderr b/tests/ui/lint/force-warn/cap-lints-allow.stderr index a037fb671af..0d10a43a14d 100644 --- a/tests/ui/lint/force-warn/cap-lints-allow.stderr +++ b/tests/ui/lint/force-warn/cap-lints-allow.stderr @@ -7,7 +7,7 @@ LL | pub fn function(_x: Box) {} = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: requested on the command line with `--force-warn bare-trait-objects` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | pub fn function(_x: Box) {} | +++ diff --git a/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr b/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr index dc85e8cf961..d52bd67e36a 100644 --- a/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr +++ b/tests/ui/lint/force-warn/lint-group-allowed-cli-warn-by-default-lint.stderr @@ -7,7 +7,7 @@ LL | pub fn function(_x: Box) {} = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `--force-warn bare-trait-objects` implied by `--force-warn rust-2018-idioms` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | pub fn function(_x: Box) {} | +++ diff --git a/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr b/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr index 55cfad838f8..22483a3d874 100644 --- a/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr +++ b/tests/ui/lint/force-warn/lint-group-allowed-lint-group.stderr @@ -7,7 +7,7 @@ LL | pub fn function(_x: Box) {} = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `--force-warn bare-trait-objects` implied by `--force-warn rust-2018-idioms` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | pub fn function(_x: Box) {} | +++ diff --git a/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr b/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr index b7bf0c4ee21..aa183b9ba54 100644 --- a/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr +++ b/tests/ui/lint/force-warn/lint-group-allowed-warn-by-default-lint.stderr @@ -7,7 +7,7 @@ LL | pub fn function(_x: Box) {} = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `--force-warn bare-trait-objects` implied by `--force-warn rust-2018-idioms` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | pub fn function(_x: Box) {} | +++ diff --git a/tests/ui/object-safety/almost-supertrait-associated-type.stderr b/tests/ui/object-safety/almost-supertrait-associated-type.stderr index 97a51c2f381..99bcccc20c0 100644 --- a/tests/ui/object-safety/almost-supertrait-associated-type.stderr +++ b/tests/ui/object-safety/almost-supertrait-associated-type.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | impl Dyn for dyn Foo + '_ { | ^^^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/almost-supertrait-associated-type.rs:33:34 | LL | trait Foo: Super @@ -21,7 +21,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | (&PhantomData:: as &dyn Foo).transmute(t) | ^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/almost-supertrait-associated-type.rs:33:34 | LL | trait Foo: Super @@ -38,7 +38,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | (&PhantomData:: as &dyn Foo).transmute(t) | ^^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/almost-supertrait-associated-type.rs:33:34 | LL | trait Foo: Super diff --git a/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.rs b/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.rs index 711bed808cc..e9216da5927 100644 --- a/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.rs +++ b/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.rs @@ -7,7 +7,7 @@ trait Foo { } fn foo(_: &dyn Foo) {} -//~^ WARN: unnecessary associated type bound for not object safe associated type +//~^ WARN: unnecessary associated type bound for dyn-incompatible associated type #[allow(unused_associated_type_bounds)] fn bar(_: &dyn Foo) {} diff --git a/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr b/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr index 7cd6175a5ad..aaadc4ed7b1 100644 --- a/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr +++ b/tests/ui/object-safety/assoc_type_bounds_sized_unnecessary.stderr @@ -1,4 +1,4 @@ -warning: unnecessary associated type bound for not object safe associated type +warning: unnecessary associated type bound for dyn-incompatible associated type --> $DIR/assoc_type_bounds_sized_unnecessary.rs:9:20 | LL | fn foo(_: &dyn Foo) {} diff --git a/tests/ui/object-safety/avoid-ice-on-warning-2.new.stderr b/tests/ui/object-safety/avoid-ice-on-warning-2.new.stderr index 0bc396390d7..3ac1ebb30e2 100644 --- a/tests/ui/object-safety/avoid-ice-on-warning-2.new.stderr +++ b/tests/ui/object-safety/avoid-ice-on-warning-2.new.stderr @@ -5,7 +5,7 @@ LL | fn id(f: Copy) -> usize { | ^^^^ `Copy` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit error[E0618]: expected function, found `(dyn Copy + 'static)` --> $DIR/avoid-ice-on-warning-2.rs:11:5 diff --git a/tests/ui/object-safety/avoid-ice-on-warning-2.old.stderr b/tests/ui/object-safety/avoid-ice-on-warning-2.old.stderr index f1f33a6c6d6..3a586450fc5 100644 --- a/tests/ui/object-safety/avoid-ice-on-warning-2.old.stderr +++ b/tests/ui/object-safety/avoid-ice-on-warning-2.old.stderr @@ -7,7 +7,7 @@ LL | fn id(f: Copy) -> usize { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn id(f: dyn Copy) -> usize { | +++ @@ -21,7 +21,7 @@ LL | fn id(f: Copy) -> usize { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn id(f: dyn Copy) -> usize { | +++ @@ -33,7 +33,7 @@ LL | fn id(f: Copy) -> usize { | ^^^^ `Copy` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit error[E0618]: expected function, found `(dyn Copy + 'static)` --> $DIR/avoid-ice-on-warning-2.rs:11:5 diff --git a/tests/ui/object-safety/avoid-ice-on-warning-3.new.stderr b/tests/ui/object-safety/avoid-ice-on-warning-3.new.stderr index fd92d43ef9a..fdd3e8ab507 100644 --- a/tests/ui/object-safety/avoid-ice-on-warning-3.new.stderr +++ b/tests/ui/object-safety/avoid-ice-on-warning-3.new.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `A` cannot be made into an object LL | trait B { fn f(a: A) -> A; } | ^ `A` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/avoid-ice-on-warning-3.rs:12:14 | LL | trait A { fn g(b: B) -> B; } @@ -26,7 +26,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | trait A { fn g(b: B) -> B; } | ^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/avoid-ice-on-warning-3.rs:4:14 | LL | trait B { fn f(a: A) -> A; } diff --git a/tests/ui/object-safety/avoid-ice-on-warning-3.old.stderr b/tests/ui/object-safety/avoid-ice-on-warning-3.old.stderr index f499e2d946f..bd362abb355 100644 --- a/tests/ui/object-safety/avoid-ice-on-warning-3.old.stderr +++ b/tests/ui/object-safety/avoid-ice-on-warning-3.old.stderr @@ -7,7 +7,7 @@ LL | trait B { fn f(a: A) -> A; } = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait B { fn f(a: dyn A) -> A; } | +++ @@ -20,7 +20,7 @@ LL | trait B { fn f(a: A) -> A; } | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait B { fn f(a: A) -> dyn A; } | +++ @@ -33,7 +33,7 @@ LL | trait A { fn g(b: B) -> B; } | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait A { fn g(b: dyn B) -> B; } | +++ @@ -46,7 +46,7 @@ LL | trait A { fn g(b: B) -> B; } | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait A { fn g(b: B) -> dyn B; } | +++ @@ -60,7 +60,7 @@ LL | trait B { fn f(a: A) -> A; } = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait B { fn f(a: dyn A) -> A; } | +++ @@ -71,7 +71,7 @@ error[E0038]: the trait `A` cannot be made into an object LL | trait B { fn f(a: A) -> A; } | ^ `A` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/avoid-ice-on-warning-3.rs:12:14 | LL | trait A { fn g(b: B) -> B; } @@ -96,7 +96,7 @@ LL | trait A { fn g(b: B) -> B; } = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait A { fn g(b: dyn B) -> B; } | +++ @@ -107,7 +107,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | trait A { fn g(b: B) -> B; } | ^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/avoid-ice-on-warning-3.rs:4:14 | LL | trait B { fn f(a: A) -> A; } diff --git a/tests/ui/object-safety/avoid-ice-on-warning.old.stderr b/tests/ui/object-safety/avoid-ice-on-warning.old.stderr index de45ec8c405..646fb57af9e 100644 --- a/tests/ui/object-safety/avoid-ice-on-warning.old.stderr +++ b/tests/ui/object-safety/avoid-ice-on-warning.old.stderr @@ -24,7 +24,7 @@ LL | fn call_this(f: F) : Fn(&str) + call_that {} = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn call_this(f: F) : dyn Fn(&str) + call_that {} | +++ diff --git a/tests/ui/object-safety/bare-trait-dont-suggest-dyn.new.stderr b/tests/ui/object-safety/bare-trait-dont-suggest-dyn.new.stderr index efddab6dff6..bb2bf6ddcda 100644 --- a/tests/ui/object-safety/bare-trait-dont-suggest-dyn.new.stderr +++ b/tests/ui/object-safety/bare-trait-dont-suggest-dyn.new.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Ord` cannot be made into an object LL | fn ord_prefer_dot(s: String) -> Ord { | ^^^ `Ord` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/cmp.rs:LL:COL | = note: the trait cannot be made into an object because it uses `Self` as a type parameter diff --git a/tests/ui/object-safety/bare-trait-dont-suggest-dyn.old.stderr b/tests/ui/object-safety/bare-trait-dont-suggest-dyn.old.stderr index 0545a1afcc1..45c9b0ce5d9 100644 --- a/tests/ui/object-safety/bare-trait-dont-suggest-dyn.old.stderr +++ b/tests/ui/object-safety/bare-trait-dont-suggest-dyn.old.stderr @@ -11,7 +11,7 @@ note: the lint level is defined here | LL | #![deny(bare_trait_objects)] | ^^^^^^^^^^^^^^^^^^ -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn ord_prefer_dot(s: String) -> dyn Ord { | +++ @@ -22,7 +22,7 @@ error[E0038]: the trait `Ord` cannot be made into an object LL | fn ord_prefer_dot(s: String) -> Ord { | ^^^ `Ord` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/cmp.rs:LL:COL | = note: the trait cannot be made into an object because it uses `Self` as a type parameter diff --git a/tests/ui/object-safety/issue-102762.stderr b/tests/ui/object-safety/issue-102762.stderr index e746628aa37..05451eb8399 100644 --- a/tests/ui/object-safety/issue-102762.stderr +++ b/tests/ui/object-safety/issue-102762.stderr @@ -7,7 +7,7 @@ LL | fn get<'a>(self: &'a Box) -> Pin> LL | fn fetcher() -> Box { | ^^^^^^^^^^^ `Fetcher` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-102762.rs:10:22 | LL | pub trait Fetcher: Send + Sync { @@ -24,7 +24,7 @@ LL | fn get<'a>(self: &'a Box) -> Pin> LL | let fetcher = fetcher(); | ^^^^^^^^^ `Fetcher` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-102762.rs:10:22 | LL | pub trait Fetcher: Send + Sync { @@ -41,7 +41,7 @@ LL | fn get<'a>(self: &'a Box) -> Pin> LL | let _ = fetcher.get(); | ^^^^^^^^^^^^^ `Fetcher` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-102762.rs:10:22 | LL | pub trait Fetcher: Send + Sync { diff --git a/tests/ui/object-safety/issue-19538.stderr b/tests/ui/object-safety/issue-19538.stderr index 31657501e25..3dbe389686a 100644 --- a/tests/ui/object-safety/issue-19538.stderr +++ b/tests/ui/object-safety/issue-19538.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | let test: &mut dyn Bar = &mut thing; | ^^^^^^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-19538.rs:2:8 | LL | fn foo(&self, val: T); @@ -21,7 +21,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | let test: &mut dyn Bar = &mut thing; | ^^^^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-19538.rs:2:8 | LL | fn foo(&self, val: T); diff --git a/tests/ui/object-safety/object-safety-associated-consts.curr.stderr b/tests/ui/object-safety/object-safety-associated-consts.curr.stderr index bd558d36f73..3c070f17c82 100644 --- a/tests/ui/object-safety/object-safety-associated-consts.curr.stderr +++ b/tests/ui/object-safety/object-safety-associated-consts.curr.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | fn make_bar(t: &T) -> &dyn Bar { | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-associated-consts.rs:9:11 | LL | trait Bar { @@ -19,7 +19,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-associated-consts.rs:9:11 | LL | trait Bar { diff --git a/tests/ui/object-safety/object-safety-associated-consts.object_safe_for_dispatch.stderr b/tests/ui/object-safety/object-safety-associated-consts.object_safe_for_dispatch.stderr index d0c78f9cd69..5b98cc35505 100644 --- a/tests/ui/object-safety/object-safety-associated-consts.object_safe_for_dispatch.stderr +++ b/tests/ui/object-safety/object-safety-associated-consts.object_safe_for_dispatch.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-associated-consts.rs:9:11 | LL | trait Bar { diff --git a/tests/ui/object-safety/object-safety-bounds.stderr b/tests/ui/object-safety/object-safety-bounds.stderr index bf3c055f4e3..96a81a69639 100644 --- a/tests/ui/object-safety/object-safety-bounds.stderr +++ b/tests/ui/object-safety/object-safety-bounds.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `X` cannot be made into an object LL | fn f() -> Box> { | ^^^^^^^^^^^^^^ `X` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-bounds.rs:4:13 | LL | trait X { diff --git a/tests/ui/object-safety/object-safety-generics.curr.stderr b/tests/ui/object-safety/object-safety-generics.curr.stderr index 85adeace3c7..7528785d90b 100644 --- a/tests/ui/object-safety/object-safety-generics.curr.stderr +++ b/tests/ui/object-safety/object-safety-generics.curr.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | fn make_bar(t: &T) -> &dyn Bar { | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-generics.rs:10:8 | LL | trait Bar { @@ -19,7 +19,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | fn make_bar_explicit(t: &T) -> &dyn Bar { | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-generics.rs:10:8 | LL | trait Bar { @@ -34,7 +34,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-generics.rs:10:8 | LL | trait Bar { @@ -50,7 +50,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t as &dyn Bar | ^^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-generics.rs:10:8 | LL | trait Bar { @@ -65,7 +65,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t as &dyn Bar | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-generics.rs:10:8 | LL | trait Bar { diff --git a/tests/ui/object-safety/object-safety-generics.object_safe_for_dispatch.stderr b/tests/ui/object-safety/object-safety-generics.object_safe_for_dispatch.stderr index 498ad0d8a5e..4686b994b33 100644 --- a/tests/ui/object-safety/object-safety-generics.object_safe_for_dispatch.stderr +++ b/tests/ui/object-safety/object-safety-generics.object_safe_for_dispatch.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-generics.rs:10:8 | LL | trait Bar { @@ -20,7 +20,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t as &dyn Bar | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-generics.rs:10:8 | LL | trait Bar { diff --git a/tests/ui/object-safety/object-safety-issue-22040.stderr b/tests/ui/object-safety/object-safety-issue-22040.stderr index 767c232c6ce..e5723f12258 100644 --- a/tests/ui/object-safety/object-safety-issue-22040.stderr +++ b/tests/ui/object-safety/object-safety-issue-22040.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Expr` cannot be made into an object LL | elements: Vec>, | ^^^^^^^^^^^^^ `Expr` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-issue-22040.rs:5:21 | LL | trait Expr: Debug + PartialEq { @@ -19,7 +19,7 @@ error[E0038]: the trait `Expr` cannot be made into an object LL | let a: Box = Box::new(SExpr::new()); | ^^^^^^^^ `Expr` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-issue-22040.rs:5:21 | LL | trait Expr: Debug + PartialEq { @@ -34,7 +34,7 @@ error[E0038]: the trait `Expr` cannot be made into an object LL | let b: Box = Box::new(SExpr::new()); | ^^^^^^^^ `Expr` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-issue-22040.rs:5:21 | LL | trait Expr: Debug + PartialEq { diff --git a/tests/ui/object-safety/object-safety-mentions-Self.curr.stderr b/tests/ui/object-safety/object-safety-mentions-Self.curr.stderr index 28c9c9d64a0..7efb6ec3542 100644 --- a/tests/ui/object-safety/object-safety-mentions-Self.curr.stderr +++ b/tests/ui/object-safety/object-safety-mentions-Self.curr.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | fn make_bar(t: &T) -> &dyn Bar { | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-mentions-Self.rs:11:22 | LL | trait Bar { @@ -19,7 +19,7 @@ error[E0038]: the trait `Baz` cannot be made into an object LL | fn make_baz(t: &T) -> &dyn Baz { | ^^^^^^^ `Baz` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-mentions-Self.rs:15:22 | LL | trait Baz { @@ -34,7 +34,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-mentions-Self.rs:11:22 | LL | trait Bar { @@ -50,7 +50,7 @@ error[E0038]: the trait `Baz` cannot be made into an object LL | t | ^ `Baz` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-mentions-Self.rs:15:22 | LL | trait Baz { diff --git a/tests/ui/object-safety/object-safety-mentions-Self.object_safe_for_dispatch.stderr b/tests/ui/object-safety/object-safety-mentions-Self.object_safe_for_dispatch.stderr index 414614d8d0b..d0efb9c587e 100644 --- a/tests/ui/object-safety/object-safety-mentions-Self.object_safe_for_dispatch.stderr +++ b/tests/ui/object-safety/object-safety-mentions-Self.object_safe_for_dispatch.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-mentions-Self.rs:11:22 | LL | trait Bar { @@ -20,7 +20,7 @@ error[E0038]: the trait `Baz` cannot be made into an object LL | t | ^ `Baz` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-mentions-Self.rs:15:22 | LL | trait Baz { diff --git a/tests/ui/object-safety/object-safety-no-static.curr.stderr b/tests/ui/object-safety/object-safety-no-static.curr.stderr index 8e5b0cbf9dd..91c3d89602e 100644 --- a/tests/ui/object-safety/object-safety-no-static.curr.stderr +++ b/tests/ui/object-safety/object-safety-no-static.curr.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn diverges() -> Box { | ^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-no-static.rs:9:8 | LL | trait Foo { @@ -27,7 +27,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let b: Box = Box::new(Bar); | ^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-no-static.rs:9:8 | LL | trait Foo { @@ -50,7 +50,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let b: Box = Box::new(Bar); | ^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-no-static.rs:9:8 | LL | trait Foo { diff --git a/tests/ui/object-safety/object-safety-no-static.object_safe_for_dispatch.stderr b/tests/ui/object-safety/object-safety-no-static.object_safe_for_dispatch.stderr index e155a350f89..52f6865b6f3 100644 --- a/tests/ui/object-safety/object-safety-no-static.object_safe_for_dispatch.stderr +++ b/tests/ui/object-safety/object-safety-no-static.object_safe_for_dispatch.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let b: Box = Box::new(Bar); | ^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-no-static.rs:9:8 | LL | trait Foo { diff --git a/tests/ui/object-safety/object-safety-sized-2.curr.stderr b/tests/ui/object-safety/object-safety-sized-2.curr.stderr index 03b078c2a44..4ce7ac5704e 100644 --- a/tests/ui/object-safety/object-safety-sized-2.curr.stderr +++ b/tests/ui/object-safety/object-safety-sized-2.curr.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | fn make_bar(t: &T) -> &dyn Bar { | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-sized-2.rs:9:18 | LL | trait Bar @@ -18,7 +18,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-sized-2.rs:9:18 | LL | trait Bar diff --git a/tests/ui/object-safety/object-safety-sized-2.object_safe_for_dispatch.stderr b/tests/ui/object-safety/object-safety-sized-2.object_safe_for_dispatch.stderr index 69af9bfe92b..99066c104b7 100644 --- a/tests/ui/object-safety/object-safety-sized-2.object_safe_for_dispatch.stderr +++ b/tests/ui/object-safety/object-safety-sized-2.object_safe_for_dispatch.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-sized-2.rs:9:18 | LL | trait Bar diff --git a/tests/ui/object-safety/object-safety-sized.curr.stderr b/tests/ui/object-safety/object-safety-sized.curr.stderr index 0513780a81f..b61f968d902 100644 --- a/tests/ui/object-safety/object-safety-sized.curr.stderr +++ b/tests/ui/object-safety/object-safety-sized.curr.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | fn make_bar(t: &T) -> &dyn Bar { | ^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-sized.rs:8:12 | LL | trait Bar: Sized { @@ -18,7 +18,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-sized.rs:8:12 | LL | trait Bar: Sized { diff --git a/tests/ui/object-safety/object-safety-sized.object_safe_for_dispatch.stderr b/tests/ui/object-safety/object-safety-sized.object_safe_for_dispatch.stderr index d988293c0e9..5ce713375a4 100644 --- a/tests/ui/object-safety/object-safety-sized.object_safe_for_dispatch.stderr +++ b/tests/ui/object-safety/object-safety-sized.object_safe_for_dispatch.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | t | ^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-sized.rs:8:12 | LL | trait Bar: Sized { diff --git a/tests/ui/object-safety/object-safety-supertrait-mentions-GAT.stderr b/tests/ui/object-safety/object-safety-supertrait-mentions-GAT.stderr index 2d2bb27b8f3..4d44627e779 100644 --- a/tests/ui/object-safety/object-safety-supertrait-mentions-GAT.stderr +++ b/tests/ui/object-safety/object-safety-supertrait-mentions-GAT.stderr @@ -26,7 +26,7 @@ error[E0038]: the trait `SuperTrait` cannot be made into an object LL | fn c(&self) -> dyn SuperTrait; | ^^^^^^^^^^^^^^^^^ `SuperTrait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-supertrait-mentions-GAT.rs:4:10 | LL | type Gat<'a> diff --git a/tests/ui/object-safety/object-safety-supertrait-mentions-Self.stderr b/tests/ui/object-safety/object-safety-supertrait-mentions-Self.stderr index 6beb04e5b93..b1a70fb859d 100644 --- a/tests/ui/object-safety/object-safety-supertrait-mentions-Self.stderr +++ b/tests/ui/object-safety/object-safety-supertrait-mentions-Self.stderr @@ -24,7 +24,7 @@ error[E0038]: the trait `Baz` cannot be made into an object LL | fn make_baz(t: &T) -> &dyn Baz { | ^^^^^^^ `Baz` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-safety-supertrait-mentions-Self.rs:8:13 | LL | trait Baz : Bar { diff --git a/tests/ui/parser/trait-object-trait-parens.stderr b/tests/ui/parser/trait-object-trait-parens.stderr index ff32b173d49..d75352b6811 100644 --- a/tests/ui/parser/trait-object-trait-parens.stderr +++ b/tests/ui/parser/trait-object-trait-parens.stderr @@ -34,7 +34,7 @@ LL | let _: Box<(Obj) + (?Sized) + (for<'a> Trait<'a>)>; = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let _: Box Trait<'a>)>; | +++ @@ -58,7 +58,7 @@ LL | let _: Box Trait<'a>) + (Obj)>; | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let _: Box Trait<'a>) + (Obj)>; | +++ @@ -82,7 +82,7 @@ LL | let _: Box Trait<'a> + (Obj) + (?Sized)>; | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let _: Box Trait<'a> + (Obj) + (?Sized)>; | +++ diff --git a/tests/ui/resolve/issue-3907-2.stderr b/tests/ui/resolve/issue-3907-2.stderr index 364edb788c6..7c966ba9891 100644 --- a/tests/ui/resolve/issue-3907-2.stderr +++ b/tests/ui/resolve/issue-3907-2.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `issue_3907::Foo` cannot be made into an object LL | fn bar(_x: Foo) {} | ^^^ `issue_3907::Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/auxiliary/issue-3907.rs:2:8 | LL | fn bar(); diff --git a/tests/ui/self/arbitrary-self-types-not-object-safe.curr.stderr b/tests/ui/self/arbitrary-self-types-not-object-safe.curr.stderr index fdd18c6b37b..e2d73fc08f6 100644 --- a/tests/ui/self/arbitrary-self-types-not-object-safe.curr.stderr +++ b/tests/ui/self/arbitrary-self-types-not-object-safe.curr.stderr @@ -7,7 +7,7 @@ LL | fn foo(self: &Rc) -> usize; LL | let x = Rc::new(5usize) as Rc; | ^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/arbitrary-self-types-not-object-safe.rs:8:18 | LL | trait Foo { @@ -25,7 +25,7 @@ LL | fn foo(self: &Rc) -> usize; LL | let x = Rc::new(5usize) as Rc; | ^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/arbitrary-self-types-not-object-safe.rs:8:18 | LL | trait Foo { diff --git a/tests/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr b/tests/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr index 363ba072c81..fda07765c66 100644 --- a/tests/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr +++ b/tests/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr @@ -7,7 +7,7 @@ LL | fn foo(self: &Rc) -> usize; LL | let x = Rc::new(5usize) as Rc; | ^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/arbitrary-self-types-not-object-safe.rs:8:18 | LL | trait Foo { diff --git a/tests/ui/statics/unsizing-wfcheck-issue-127299.stderr b/tests/ui/statics/unsizing-wfcheck-issue-127299.stderr index 49e8d87f354..59e09e48523 100644 --- a/tests/ui/statics/unsizing-wfcheck-issue-127299.stderr +++ b/tests/ui/statics/unsizing-wfcheck-issue-127299.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Qux` cannot be made into an object LL | pub desc: &'static dyn Qux, | ^^^^^^^ `Qux` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/unsizing-wfcheck-issue-127299.rs:4:8 | LL | trait Qux { @@ -42,7 +42,7 @@ error[E0038]: the trait `Qux` cannot be made into an object LL | static FOO: &Lint = &Lint { desc: "desc" }; | ^^^^^^ `Qux` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/unsizing-wfcheck-issue-127299.rs:4:8 | LL | trait Qux { @@ -65,7 +65,7 @@ error[E0038]: the trait `Qux` cannot be made into an object LL | static FOO: &Lint = &Lint { desc: "desc" }; | ^^^^^^ `Qux` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/unsizing-wfcheck-issue-127299.rs:4:8 | LL | trait Qux { diff --git a/tests/ui/suggestions/issue-116434-2015.rs b/tests/ui/suggestions/issue-116434-2015.rs index a53e2a044e9..2e94473eb1a 100644 --- a/tests/ui/suggestions/issue-116434-2015.rs +++ b/tests/ui/suggestions/issue-116434-2015.rs @@ -3,10 +3,10 @@ trait Foo { fn foo() -> Clone; //~^ WARNING trait objects without an explicit `dyn` are deprecated [bare_trait_objects] //~| WARNING this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! - //~| HELP if this is an object-safe trait, use `dyn` + //~| HELP if this is a dyn-compatible trait, use `dyn` //~| WARNING trait objects without an explicit `dyn` are deprecated [bare_trait_objects] //~| WARNING this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! - //~| HELP if this is an object-safe trait, use `dyn` + //~| HELP if this is a dyn-compatible trait, use `dyn` //~| ERROR the trait `Clone` cannot be made into an object [E0038] //~| HELP there is an associated type with the same name } @@ -18,10 +18,10 @@ trait DbInterface { fn handle() -> DbHandle; //~^ WARNING trait objects without an explicit `dyn` are deprecated [bare_trait_objects] //~| WARNING this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! - //~| HELP if this is an object-safe trait, use `dyn` + //~| HELP if this is a dyn-compatible trait, use `dyn` //~| WARNING trait objects without an explicit `dyn` are deprecated [bare_trait_objects] //~| WARNING this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! - //~| HELP if this is an object-safe trait, use `dyn` + //~| HELP if this is a dyn-compatible trait, use `dyn` //~| ERROR the trait `DbHandle` cannot be made into an object [E0038] //~| HELP there is an associated type with the same name } diff --git a/tests/ui/suggestions/issue-116434-2015.stderr b/tests/ui/suggestions/issue-116434-2015.stderr index 73a1cfa9c1d..24fc87f765f 100644 --- a/tests/ui/suggestions/issue-116434-2015.stderr +++ b/tests/ui/suggestions/issue-116434-2015.stderr @@ -7,7 +7,7 @@ LL | fn foo() -> Clone; = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn foo() -> dyn Clone; | +++ @@ -20,7 +20,7 @@ LL | fn handle() -> DbHandle; | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn handle() -> dyn DbHandle; | +++ @@ -34,7 +34,7 @@ LL | fn foo() -> Clone; = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn foo() -> dyn Clone; | +++ @@ -46,7 +46,7 @@ LL | fn foo() -> Clone; | ^^^^^ `Clone` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit help: there is an associated type with the same name | LL | fn foo() -> Self::Clone; @@ -61,7 +61,7 @@ LL | fn handle() -> DbHandle; = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn handle() -> dyn DbHandle; | +++ @@ -72,7 +72,7 @@ error[E0038]: the trait `DbHandle` cannot be made into an object LL | fn handle() -> DbHandle; | ^^^^^^^^ `DbHandle` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-116434-2015.rs:14:17 | LL | trait DbHandle: Sized {} diff --git a/tests/ui/suggestions/issue-116434-2021.stderr b/tests/ui/suggestions/issue-116434-2021.stderr index a10d6ef6da4..7f8cc147210 100644 --- a/tests/ui/suggestions/issue-116434-2021.stderr +++ b/tests/ui/suggestions/issue-116434-2021.stderr @@ -5,7 +5,7 @@ LL | fn foo() -> Clone; | ^^^^^ `Clone` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit help: there is an associated type with the same name | LL | fn foo() -> Self::Clone; @@ -17,7 +17,7 @@ error[E0038]: the trait `DbHandle` cannot be made into an object LL | fn handle() -> DbHandle; | ^^^^^^^^ `DbHandle` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-116434-2021.rs:10:17 | LL | trait DbHandle: Sized {} diff --git a/tests/ui/suggestions/issue-61963.stderr b/tests/ui/suggestions/issue-61963.stderr index 084b0cbeef2..734c88f3fd6 100644 --- a/tests/ui/suggestions/issue-61963.stderr +++ b/tests/ui/suggestions/issue-61963.stderr @@ -11,7 +11,7 @@ note: the lint level is defined here | LL | #![deny(bare_trait_objects)] | ^^^^^^^^^^^^^^^^^^ -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | bar: Box, | +++ @@ -24,7 +24,7 @@ LL | pub struct Foo { | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | dyn pub struct Foo { | +++ diff --git a/tests/ui/suggestions/issue-98500.stderr b/tests/ui/suggestions/issue-98500.stderr index aa66a9aa1e7..c4b446763af 100644 --- a/tests/ui/suggestions/issue-98500.stderr +++ b/tests/ui/suggestions/issue-98500.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | struct S(Box); | ^^^^^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/auxiliary/not-object-safe.rs:4:8 | LL | fn f(); diff --git a/tests/ui/suggestions/object-unsafe-trait-references-self.stderr b/tests/ui/suggestions/object-unsafe-trait-references-self.stderr index 64270068471..6af55e7bcae 100644 --- a/tests/ui/suggestions/object-unsafe-trait-references-self.stderr +++ b/tests/ui/suggestions/object-unsafe-trait-references-self.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | fn bar(x: &dyn Trait) {} | ^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-references-self.rs:2:22 | LL | trait Trait { @@ -23,7 +23,7 @@ error[E0038]: the trait `Other` cannot be made into an object LL | fn foo(x: &dyn Other) {} | ^^^^^^^^^ `Other` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-references-self.rs:11:14 | LL | trait Other: Sized {} diff --git a/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021-without-dyn.stderr b/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021-without-dyn.stderr index 60eb72ab4f7..a17f821ebec 100644 --- a/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021-without-dyn.stderr +++ b/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021-without-dyn.stderr @@ -17,7 +17,7 @@ error[E0038]: the trait `A` cannot be made into an object LL | fn f(a: A) -> A; | ^ `A` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-self-2021-without-dyn.rs:3:10 | LL | trait A: Sized { @@ -44,7 +44,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | fn f(b: B) -> B; | ^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-self-2021-without-dyn.rs:11:8 | LL | trait B { @@ -81,7 +81,7 @@ LL | fn f(&self, c: C) -> C; | | | help: consider changing method `f`'s `self` parameter to be `&self` (notice the capitalization): `&Self` | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-self-2021-without-dyn.rs:18:10 | LL | trait C { @@ -95,7 +95,7 @@ error[E0782]: trait objects must include the `dyn` keyword LL | fn f(a: A) -> A; | ^ | - = note: `A` it is not object safe, so it can't be `dyn` + = note: `A` it is dyn-incompatible, so it can't be `dyn` help: use a new generic type parameter, constrained by `A` | LL | fn f(a: T) -> A; @@ -111,7 +111,7 @@ error[E0782]: trait objects must include the `dyn` keyword LL | fn f(a: A) -> A; | ^ | -help: `A` is not object safe, use `impl A` to return an opaque type, as long as you return a single underlying type +help: `A` is dyn-incompatible, use `impl A` to return an opaque type, as long as you return a single underlying type | LL | fn f(a: A) -> impl A; | ++++ @@ -122,7 +122,7 @@ error[E0782]: trait objects must include the `dyn` keyword LL | fn f(b: B) -> B; | ^ | - = note: `B` it is not object safe, so it can't be `dyn` + = note: `B` it is dyn-incompatible, so it can't be `dyn` help: use a new generic type parameter, constrained by `B` | LL | fn f(b: T) -> B; @@ -138,7 +138,7 @@ error[E0782]: trait objects must include the `dyn` keyword LL | fn f(b: B) -> B; | ^ | -help: `B` is not object safe, use `impl B` to return an opaque type, as long as you return a single underlying type +help: `B` is dyn-incompatible, use `impl B` to return an opaque type, as long as you return a single underlying type | LL | fn f(b: B) -> impl B; | ++++ @@ -149,7 +149,7 @@ error[E0782]: trait objects must include the `dyn` keyword LL | fn f(&self, c: C) -> C; | ^ | - = note: `C` it is not object safe, so it can't be `dyn` + = note: `C` it is dyn-incompatible, so it can't be `dyn` help: use a new generic type parameter, constrained by `C` | LL | fn f(&self, c: T) -> C; @@ -165,7 +165,7 @@ error[E0782]: trait objects must include the `dyn` keyword LL | fn f(&self, c: C) -> C; | ^ | -help: `C` is not object safe, use `impl C` to return an opaque type, as long as you return a single underlying type +help: `C` is dyn-incompatible, use `impl C` to return an opaque type, as long as you return a single underlying type | LL | fn f(&self, c: C) -> impl C; | ++++ diff --git a/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021.stderr b/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021.stderr index d6376be9c04..a7d36d9ebee 100644 --- a/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021.stderr +++ b/tests/ui/suggestions/object-unsafe-trait-should-use-self-2021.stderr @@ -17,7 +17,7 @@ error[E0038]: the trait `A` cannot be made into an object LL | fn f(a: dyn A) -> dyn A; | ^^^^^ `A` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-self-2021.rs:3:10 | LL | trait A: Sized { @@ -44,7 +44,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | fn f(a: dyn B) -> dyn B; | ^^^^^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-self-2021.rs:9:8 | LL | trait B { diff --git a/tests/ui/suggestions/object-unsafe-trait-should-use-self.stderr b/tests/ui/suggestions/object-unsafe-trait-should-use-self.stderr index 55047b42698..28952933c64 100644 --- a/tests/ui/suggestions/object-unsafe-trait-should-use-self.stderr +++ b/tests/ui/suggestions/object-unsafe-trait-should-use-self.stderr @@ -17,7 +17,7 @@ error[E0038]: the trait `A` cannot be made into an object LL | fn f(a: A) -> A; | ^ `A` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-self.rs:2:10 | LL | trait A: Sized { @@ -44,7 +44,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | fn f(a: B) -> B; | ^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-self.rs:8:8 | LL | trait B { diff --git a/tests/ui/suggestions/object-unsafe-trait-should-use-where-sized.stderr b/tests/ui/suggestions/object-unsafe-trait-should-use-where-sized.stderr index abbf56cfac8..5e3a0290d42 100644 --- a/tests/ui/suggestions/object-unsafe-trait-should-use-where-sized.stderr +++ b/tests/ui/suggestions/object-unsafe-trait-should-use-where-sized.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | fn bar(x: &dyn Trait) {} | ^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-trait-should-use-where-sized.rs:5:8 | LL | trait Trait { diff --git a/tests/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr b/tests/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr index 5d805d97a43..d1da9a89c19 100644 --- a/tests/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr +++ b/tests/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr @@ -67,7 +67,7 @@ LL | impl<'a, T> Struct for Trait<'a, T> {} = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | impl<'a, T> Struct for dyn Trait<'a, T> {} | +++ @@ -80,7 +80,7 @@ LL | impl<'a, T> Enum for Trait<'a, T> {} | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | impl<'a, T> Enum for dyn Trait<'a, T> {} | +++ @@ -93,7 +93,7 @@ LL | impl<'a, T> Union for Trait<'a, T> {} | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | impl<'a, T> Union for dyn Trait<'a, T> {} | +++ diff --git a/tests/ui/traits/alias/object-fail.stderr b/tests/ui/traits/alias/object-fail.stderr index a27a3ea0ec0..1b89b87db9f 100644 --- a/tests/ui/traits/alias/object-fail.stderr +++ b/tests/ui/traits/alias/object-fail.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Eq` cannot be made into an object LL | let _: &dyn EqAlias = &123; | ^^^^^^^^^^^ `Eq` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $SRC_DIR/core/src/cmp.rs:LL:COL | = note: the trait cannot be made into an object because it uses `Self` as a type parameter diff --git a/tests/ui/traits/bound/not-on-bare-trait.stderr b/tests/ui/traits/bound/not-on-bare-trait.stderr index f1e7a28654a..1e385f73823 100644 --- a/tests/ui/traits/bound/not-on-bare-trait.stderr +++ b/tests/ui/traits/bound/not-on-bare-trait.stderr @@ -7,7 +7,7 @@ LL | fn foo(_x: Foo + Send) { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn foo(_x: dyn Foo + Send) { | +++ diff --git a/tests/ui/traits/issue-20692.stderr b/tests/ui/traits/issue-20692.stderr index 30e3c9da1a0..5e6a967fdc4 100644 --- a/tests/ui/traits/issue-20692.stderr +++ b/tests/ui/traits/issue-20692.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Array` cannot be made into an object LL | &dyn Array; | ^^^^^^^^^^ `Array` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-20692.rs:1:14 | LL | trait Array: Sized + Copy {} @@ -19,7 +19,7 @@ error[E0038]: the trait `Array` cannot be made into an object LL | let _ = x | ^ `Array` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-20692.rs:1:14 | LL | trait Array: Sized + Copy {} diff --git a/tests/ui/traits/issue-28576.stderr b/tests/ui/traits/issue-28576.stderr index 7e0f52bc4fe..23581f2ee51 100644 --- a/tests/ui/traits/issue-28576.stderr +++ b/tests/ui/traits/issue-28576.stderr @@ -25,7 +25,7 @@ LL | / dyn Bar LL | | | |________________________^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-28576.rs:5:16 | LL | pub trait Bar: Foo { diff --git a/tests/ui/traits/issue-38404.stderr b/tests/ui/traits/issue-38404.stderr index 19d4035b54c..145eeb88dd5 100644 --- a/tests/ui/traits/issue-38404.stderr +++ b/tests/ui/traits/issue-38404.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | trait C: A> {} | ^^^^^^^^^^^^^^^^^^^^^^^^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-38404.rs:1:13 | LL | trait A: std::ops::Add + Sized {} @@ -18,7 +18,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | trait C: A> {} | ^^^^^^^^^^^^^^^^^^^^^^^^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-38404.rs:1:13 | LL | trait A: std::ops::Add + Sized {} @@ -33,7 +33,7 @@ error[E0038]: the trait `B` cannot be made into an object LL | trait C: A> {} | ^^^^^^^^^^^^^^^^^^^^^^^^ `B` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-38404.rs:1:13 | LL | trait A: std::ops::Add + Sized {} diff --git a/tests/ui/traits/issue-38604.stderr b/tests/ui/traits/issue-38604.stderr index 3ab9af21bc4..5c788b0c85d 100644 --- a/tests/ui/traits/issue-38604.stderr +++ b/tests/ui/traits/issue-38604.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let _f: Box = | ^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-38604.rs:2:22 | LL | trait Foo where u32: Q { @@ -19,7 +19,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | Box::new(()); | ^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-38604.rs:2:22 | LL | trait Foo where u32: Q { diff --git a/tests/ui/traits/issue-72410.stderr b/tests/ui/traits/issue-72410.stderr index 58266e1842e..6d56a198fc1 100644 --- a/tests/ui/traits/issue-72410.stderr +++ b/tests/ui/traits/issue-72410.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Bar` cannot be made into an object LL | where for<'a> &'a mut [dyn Bar]: ; | ^^^^^^^^^^^^^^^^^ `Bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-72410.rs:13:8 | LL | pub trait Bar { diff --git a/tests/ui/traits/issue-78372.stderr b/tests/ui/traits/issue-78372.stderr index cdcb0cdf259..9b93ffe8efb 100644 --- a/tests/ui/traits/issue-78372.stderr +++ b/tests/ui/traits/issue-78372.stderr @@ -64,7 +64,7 @@ LL | fn foo(self: Smaht); LL | impl Marker for dyn Foo {} | ^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-78372.rs:9:18 | LL | trait Foo: X {} diff --git a/tests/ui/traits/item-privacy.stderr b/tests/ui/traits/item-privacy.stderr index fd474fac155..c20d2f723c5 100644 --- a/tests/ui/traits/item-privacy.stderr +++ b/tests/ui/traits/item-privacy.stderr @@ -142,7 +142,7 @@ error[E0038]: the trait `assoc_const::C` cannot be made into an object LL | ::A; | ^^^^^ `assoc_const::C` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/item-privacy.rs:25:15 | LL | const A: u8 = 0; diff --git a/tests/ui/traits/non_lifetime_binders/supertrait-object-safety.stderr b/tests/ui/traits/non_lifetime_binders/supertrait-object-safety.stderr index b6e540c5ffc..0854ea28150 100644 --- a/tests/ui/traits/non_lifetime_binders/supertrait-object-safety.stderr +++ b/tests/ui/traits/non_lifetime_binders/supertrait-object-safety.stderr @@ -13,7 +13,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let x: &dyn Foo = &(); | ^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/supertrait-object-safety.rs:4:12 | LL | trait Foo: for Bar {} @@ -29,7 +29,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | let x: &dyn Foo = &(); | ^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/supertrait-object-safety.rs:4:12 | LL | trait Foo: for Bar {} @@ -44,7 +44,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | needs_bar(x); | ^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/supertrait-object-safety.rs:4:12 | LL | trait Foo: for Bar {} diff --git a/tests/ui/traits/object/canonicalize-fresh-infer-vars-issue-103626.stderr b/tests/ui/traits/object/canonicalize-fresh-infer-vars-issue-103626.stderr index d5e9b1be63b..960802e2f8f 100644 --- a/tests/ui/traits/object/canonicalize-fresh-infer-vars-issue-103626.stderr +++ b/tests/ui/traits/object/canonicalize-fresh-infer-vars-issue-103626.stderr @@ -12,7 +12,7 @@ error[E0038]: the trait `FromResidual` cannot be made into an object LL | let b: &dyn FromResidual = &(); | ^^^^^^^^^^^^^^^^^ `FromResidual` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/canonicalize-fresh-infer-vars-issue-103626.rs:2:8 | LL | trait FromResidual::Residual> { diff --git a/tests/ui/traits/object/macro-matcher.stderr b/tests/ui/traits/object/macro-matcher.stderr index 6d1e236c048..7924c86e294 100644 --- a/tests/ui/traits/object/macro-matcher.stderr +++ b/tests/ui/traits/object/macro-matcher.stderr @@ -11,7 +11,7 @@ LL | m!(dyn Copy + Send + 'static); | ^^^^^^^^^^^^^^^^^^^^^^^^^ `Copy` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit error: aborting due to 2 previous errors diff --git a/tests/ui/traits/object/object-unsafe-missing-assoc-type.stderr b/tests/ui/traits/object/object-unsafe-missing-assoc-type.stderr index 4c636c5e922..9258b38f26c 100644 --- a/tests/ui/traits/object/object-unsafe-missing-assoc-type.stderr +++ b/tests/ui/traits/object/object-unsafe-missing-assoc-type.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn bar(x: &dyn Foo) {} | ^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-missing-assoc-type.rs:2:10 | LL | trait Foo { @@ -19,7 +19,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn bar(x: &dyn Foo) {} | ^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-missing-assoc-type.rs:2:10 | LL | trait Foo { @@ -35,7 +35,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn bar(x: &dyn Foo) {} | ^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-missing-assoc-type.rs:2:10 | LL | trait Foo { @@ -51,7 +51,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | fn bar(x: &dyn Foo) {} | ^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/object-unsafe-missing-assoc-type.rs:2:10 | LL | trait Foo { diff --git a/tests/ui/traits/object/pretty.stderr b/tests/ui/traits/object/pretty.stderr index 6964d97c08e..ca56bdbb67a 100644 --- a/tests/ui/traits/object/pretty.stderr +++ b/tests/ui/traits/object/pretty.stderr @@ -1,4 +1,4 @@ -warning: unnecessary associated type bound for not object safe associated type +warning: unnecessary associated type bound for dyn-incompatible associated type --> $DIR/pretty.rs:41:35 | LL | fn dyn_has_gat(x: &dyn HasGat = ()>) { x } diff --git a/tests/ui/traits/object/safety.stderr b/tests/ui/traits/object/safety.stderr index 19a46a502c2..a2cb656b08d 100644 --- a/tests/ui/traits/object/safety.stderr +++ b/tests/ui/traits/object/safety.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Tr` cannot be made into an object LL | let _: &dyn Tr = &St; | ^^^ `Tr` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/safety.rs:4:8 | LL | trait Tr { @@ -28,7 +28,7 @@ error[E0038]: the trait `Tr` cannot be made into an object LL | let _: &dyn Tr = &St; | ^^^^^^^ `Tr` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/safety.rs:4:8 | LL | trait Tr { diff --git a/tests/ui/traits/test-2.stderr b/tests/ui/traits/test-2.stderr index 0ee64cc0952..3da95b47844 100644 --- a/tests/ui/traits/test-2.stderr +++ b/tests/ui/traits/test-2.stderr @@ -32,7 +32,7 @@ error[E0038]: the trait `bar` cannot be made into an object LL | (Box::new(10) as Box).dup(); | ^^^^^^^^^^^^ `bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/test-2.rs:4:30 | LL | trait bar { fn dup(&self) -> Self; fn blah(&self); } @@ -52,7 +52,7 @@ error[E0038]: the trait `bar` cannot be made into an object LL | (Box::new(10) as Box).dup(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/test-2.rs:4:30 | LL | trait bar { fn dup(&self) -> Self; fn blah(&self); } @@ -72,7 +72,7 @@ error[E0038]: the trait `bar` cannot be made into an object LL | (Box::new(10) as Box).dup(); | ^^^^^^^^^^^^ `bar` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/test-2.rs:4:30 | LL | trait bar { fn dup(&self) -> Self; fn blah(&self); } diff --git a/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.rs b/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.rs index 3c6ab86e4c6..626630e60b7 100644 --- a/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.rs +++ b/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.rs @@ -5,6 +5,6 @@ trait A {} trait B {} trait C: A + B {} -//~^ ERROR `C` is object-safe and has multiple supertraits +//~^ ERROR `C` is dyn-compatible and has multiple supertraits fn main() {} diff --git a/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.stderr b/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.stderr index d075102b2e8..fab781026b1 100644 --- a/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.stderr +++ b/tests/ui/traits/trait-upcasting/multiple_supertrait_upcastable.stderr @@ -1,4 +1,4 @@ -error: `C` is object-safe and has multiple supertraits +error: `C` is dyn-compatible and has multiple supertraits --> $DIR/multiple_supertrait_upcastable.rs:7:1 | LL | trait C: A + B {} diff --git a/tests/ui/traits/unspecified-self-in-trait-ref.stderr b/tests/ui/traits/unspecified-self-in-trait-ref.stderr index 3614348ceed..22dceadc10d 100644 --- a/tests/ui/traits/unspecified-self-in-trait-ref.stderr +++ b/tests/ui/traits/unspecified-self-in-trait-ref.stderr @@ -7,7 +7,7 @@ LL | let a = Foo::lol(); = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let a = ::lol(); | ++++ + @@ -26,7 +26,7 @@ LL | let b = Foo::<_>::lol(); | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let b = >::lol(); | ++++ + @@ -45,7 +45,7 @@ LL | let c = Bar::lol(); | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let c = ::lol(); | ++++ + @@ -64,7 +64,7 @@ LL | let d = Bar::::lol(); | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let d = >::lol(); | ++++ + @@ -83,7 +83,7 @@ LL | let e = Bar::::lol(); | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | let e = >::lol(); | ++++ + diff --git a/tests/ui/type/type-parameter-defaults-referencing-Self-ppaux.stderr b/tests/ui/type/type-parameter-defaults-referencing-Self-ppaux.stderr index 4412c49eadd..2d5bcf1fbc4 100644 --- a/tests/ui/type/type-parameter-defaults-referencing-Self-ppaux.stderr +++ b/tests/ui/type/type-parameter-defaults-referencing-Self-ppaux.stderr @@ -16,7 +16,7 @@ error[E0038]: the trait `MyAdd` cannot be made into an object LL | let y = x as dyn MyAdd; | ^^^^^^^^^^^^^^ `MyAdd` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/type-parameter-defaults-referencing-Self-ppaux.rs:6:55 | LL | trait MyAdd { fn add(&self, other: &Rhs) -> Self; } diff --git a/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122199.stderr b/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122199.stderr index f2456f99e62..6b309c223af 100644 --- a/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122199.stderr +++ b/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122199.stderr @@ -34,7 +34,7 @@ LL | trait Trait { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait Trait { | +++ @@ -67,7 +67,7 @@ LL | fn fnc(&self) -> Trait { | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn fnc(&self) -> Trait { | +++ @@ -80,7 +80,7 @@ LL | fn fnc(&self) -> Trait { | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn fnc(&self) -> dyn Trait { | +++ @@ -94,7 +94,7 @@ LL | trait Trait { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait Trait { | +++ @@ -105,7 +105,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | trait Trait { | ^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:12:8 | LL | trait Trait { @@ -121,7 +121,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | trait Trait { | ^^^^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:12:8 | LL | trait Trait { @@ -162,7 +162,7 @@ LL | fn fnc(&self) -> Trait { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | fn fnc(&self) -> Trait { | +++ @@ -173,7 +173,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | fn fnc(&self) -> Trait { | ^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:12:8 | LL | trait Trait { @@ -189,7 +189,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | trait Trait { | ^^^^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:12:8 | LL | trait Trait { diff --git a/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122989.stderr b/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122989.stderr index a0fd11de2dc..d2b0e2d92e0 100644 --- a/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122989.stderr +++ b/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122989.stderr @@ -7,7 +7,7 @@ LL | trait Foo> { = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: `#[warn(bare_trait_objects)]` on by default -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait Foo> { | +++ @@ -20,7 +20,7 @@ LL | trait Bar> {} | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see -help: if this is an object-safe trait, use `dyn` +help: if this is a dyn-compatible trait, use `dyn` | LL | trait Bar> {} | +++ @@ -50,7 +50,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | trait Foo> { | ^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:8:8 | LL | trait Foo> { @@ -81,7 +81,7 @@ error[E0038]: the trait `Foo` cannot be made into an object LL | trait Bar> {} | ^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:8:8 | LL | trait Foo> { diff --git a/tests/ui/wf/issue-87495.stderr b/tests/ui/wf/issue-87495.stderr index 3ccfd7f8d79..5973fff3e00 100644 --- a/tests/ui/wf/issue-87495.stderr +++ b/tests/ui/wf/issue-87495.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `T` cannot be made into an object LL | const CONST: (bool, dyn T); | ^^^^^ `T` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/issue-87495.rs:4:11 | LL | trait T { diff --git a/tests/ui/wf/wf-convert-unsafe-trait-obj-box.stderr b/tests/ui/wf/wf-convert-unsafe-trait-obj-box.stderr index 85f5073364f..2565e25a242 100644 --- a/tests/ui/wf/wf-convert-unsafe-trait-obj-box.stderr +++ b/tests/ui/wf/wf-convert-unsafe-trait-obj-box.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | let t_box: Box = Box::new(S); | ^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-convert-unsafe-trait-obj-box.rs:6:14 | LL | trait Trait: Sized {} @@ -20,7 +20,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | takes_box(Box::new(S)); | ^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-convert-unsafe-trait-obj-box.rs:6:14 | LL | trait Trait: Sized {} @@ -36,7 +36,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | Box::new(S) as Box; | ^^^^^^^^^^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-convert-unsafe-trait-obj-box.rs:6:14 | LL | trait Trait: Sized {} diff --git a/tests/ui/wf/wf-convert-unsafe-trait-obj.stderr b/tests/ui/wf/wf-convert-unsafe-trait-obj.stderr index a2a19631649..97f6bcd0428 100644 --- a/tests/ui/wf/wf-convert-unsafe-trait-obj.stderr +++ b/tests/ui/wf/wf-convert-unsafe-trait-obj.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | let t: &dyn Trait = &S; | ^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-convert-unsafe-trait-obj.rs:6:14 | LL | trait Trait: Sized {} @@ -20,7 +20,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | takes_trait(&S); | ^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-convert-unsafe-trait-obj.rs:6:14 | LL | trait Trait: Sized {} @@ -36,7 +36,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | &S as &dyn Trait; | ^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-convert-unsafe-trait-obj.rs:6:14 | LL | trait Trait: Sized {} diff --git a/tests/ui/wf/wf-fn-where-clause.stderr b/tests/ui/wf/wf-fn-where-clause.stderr index 40f2f452639..fbfe42ac624 100644 --- a/tests/ui/wf/wf-fn-where-clause.stderr +++ b/tests/ui/wf/wf-fn-where-clause.stderr @@ -21,7 +21,7 @@ LL | fn bar() where Vec:, {} | ^^^^^^^^^^^^^ `Copy` cannot be made into an object | = note: the trait cannot be made into an object because it requires `Self: Sized` - = note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit + = note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit error[E0277]: the size for values of type `(dyn Copy + 'static)` cannot be known at compilation time --> $DIR/wf-fn-where-clause.rs:12:16 diff --git a/tests/ui/wf/wf-object-safe.stderr b/tests/ui/wf/wf-object-safe.stderr index cc5351346b3..7c14f3d2f8b 100644 --- a/tests/ui/wf/wf-object-safe.stderr +++ b/tests/ui/wf/wf-object-safe.stderr @@ -4,7 +4,7 @@ error[E0038]: the trait `A` cannot be made into an object LL | let _x: &dyn A; | ^^^^^^ `A` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-object-safe.rs:5:23 | LL | trait A { diff --git a/tests/ui/wf/wf-unsafe-trait-obj-match.stderr b/tests/ui/wf/wf-unsafe-trait-obj-match.stderr index 8d5b377988c..edbdec6a5ef 100644 --- a/tests/ui/wf/wf-unsafe-trait-obj-match.stderr +++ b/tests/ui/wf/wf-unsafe-trait-obj-match.stderr @@ -18,7 +18,7 @@ error[E0038]: the trait `Trait` cannot be made into an object LL | Some(()) => &S, | ^^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-unsafe-trait-obj-match.rs:6:14 | LL | trait Trait: Sized {} @@ -40,7 +40,7 @@ LL | | None => &R, LL | | }; | |_____^ `Trait` cannot be made into an object | -note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit +note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit --> $DIR/wf-unsafe-trait-obj-match.rs:6:14 | LL | trait Trait: Sized {} -- cgit 1.4.1-3-g733a5 From e9635685859626cc4ea252eac65beef0f6066e68 Mon Sep 17 00:00:00 2001 From: Matthias Krüger Date: Sun, 29 Sep 2024 12:18:11 +0200 Subject: cleanup: don't `.into()` identical types --- compiler/rustc_const_eval/src/interpret/intrinsics.rs | 7 ++----- compiler/rustc_interface/src/interface.rs | 2 +- compiler/rustc_lint/src/if_let_rescope.rs | 2 +- 3 files changed, 4 insertions(+), 7 deletions(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_const_eval/src/interpret/intrinsics.rs b/compiler/rustc_const_eval/src/interpret/intrinsics.rs index e1fd8bea1f3..4c34ffc5d4e 100644 --- a/compiler/rustc_const_eval/src/interpret/intrinsics.rs +++ b/compiler/rustc_const_eval/src/interpret/intrinsics.rs @@ -396,11 +396,8 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> { for i in 0..dest_len { let place = self.project_index(&dest, i)?; - let value = if i == index { - elem.clone() - } else { - self.project_index(&input, i)?.into() - }; + let value = + if i == index { elem.clone() } else { self.project_index(&input, i)? }; self.copy_op(&value, &place)?; } } diff --git a/compiler/rustc_interface/src/interface.rs b/compiler/rustc_interface/src/interface.rs index c2241773c8c..3b8077bb3fc 100644 --- a/compiler/rustc_interface/src/interface.rs +++ b/compiler/rustc_interface/src/interface.rs @@ -427,7 +427,7 @@ pub fn run_compiler(config: Config, f: impl FnOnce(&Compiler) -> R + Se Err(e) => early_dcx.early_fatal(format!("failed to load fluent bundle: {e}")), }; - let mut locale_resources = Vec::from(config.locale_resources); + let mut locale_resources = config.locale_resources; locale_resources.push(codegen_backend.locale_resource()); let mut sess = rustc_session::build_session( diff --git a/compiler/rustc_lint/src/if_let_rescope.rs b/compiler/rustc_lint/src/if_let_rescope.rs index 229d0c36421..c6218fe1e74 100644 --- a/compiler/rustc_lint/src/if_let_rescope.rs +++ b/compiler/rustc_lint/src/if_let_rescope.rs @@ -304,7 +304,7 @@ impl Subdiagnostic for IfLetRescopeRewrite { .chain(repeat('}').take(closing_brackets.count)) .collect(), )); - let msg = f(diag, crate::fluent_generated::lint_suggestion.into()); + let msg = f(diag, crate::fluent_generated::lint_suggestion); diag.multipart_suggestion_with_style( msg, suggestions, -- cgit 1.4.1-3-g733a5 From 9cb540a13cb2249754ea3e755cb1472151d061db Mon Sep 17 00:00:00 2001 From: Urgau Date: Mon, 30 Sep 2024 12:13:17 +0200 Subject: Reject leading unsafe in `cfg!(...)` and `--check-cfg`. --- compiler/rustc_builtin_macros/src/cfg.rs | 2 +- compiler/rustc_interface/src/interface.rs | 2 +- .../unsafe/extraneous-unsafe-attributes.rs | 6 +++++- .../unsafe/extraneous-unsafe-attributes.stderr | 20 +++++++++++++++++++- tests/ui/check-cfg/invalid-arguments.rs | 3 ++- .../check-cfg/invalid-arguments.unsafe_attr.stderr | 5 +++++ 6 files changed, 33 insertions(+), 5 deletions(-) create mode 100644 tests/ui/check-cfg/invalid-arguments.unsafe_attr.stderr (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_builtin_macros/src/cfg.rs b/compiler/rustc_builtin_macros/src/cfg.rs index de198115fa0..cf1d5c68ead 100644 --- a/compiler/rustc_builtin_macros/src/cfg.rs +++ b/compiler/rustc_builtin_macros/src/cfg.rs @@ -43,7 +43,7 @@ fn parse_cfg<'a>(cx: &ExtCtxt<'a>, span: Span, tts: TokenStream) -> PResult<'a, return Err(cx.dcx().create_err(errors::RequiresCfgPattern { span })); } - let cfg = p.parse_meta_item(AllowLeadingUnsafe::Yes)?; + let cfg = p.parse_meta_item(AllowLeadingUnsafe::No)?; let _ = p.eat(&token::Comma); diff --git a/compiler/rustc_interface/src/interface.rs b/compiler/rustc_interface/src/interface.rs index c2241773c8c..780693f8932 100644 --- a/compiler/rustc_interface/src/interface.rs +++ b/compiler/rustc_interface/src/interface.rs @@ -174,7 +174,7 @@ pub(crate) fn parse_check_cfg(dcx: DiagCtxtHandle<'_>, specs: Vec) -> Ch } }; - let meta_item = match parser.parse_meta_item(AllowLeadingUnsafe::Yes) { + let meta_item = match parser.parse_meta_item(AllowLeadingUnsafe::No) { Ok(meta_item) if parser.token == token::Eof => meta_item, Ok(..) => expected_error(), Err(err) => { diff --git a/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.rs b/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.rs index b561550c198..273b127bf9c 100644 --- a/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.rs +++ b/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.rs @@ -27,4 +27,8 @@ mod inner { #[unsafe(used)] //~ ERROR: is not an unsafe attribute static FOO: usize = 0; -fn main() {} +fn main() { + let _a = cfg!(unsafe(foo)); + //~^ ERROR: expected identifier, found keyword `unsafe` + //~^^ ERROR: invalid predicate `r#unsafe` +} diff --git a/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.stderr b/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.stderr index 9fb7f062b91..445d239d867 100644 --- a/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.stderr +++ b/tests/ui/attributes/unsafe/extraneous-unsafe-attributes.stderr @@ -22,6 +22,23 @@ LL | #[unsafe(test)] | = note: extraneous unsafe is not allowed in attributes +error: expected identifier, found keyword `unsafe` + --> $DIR/extraneous-unsafe-attributes.rs:31:19 + | +LL | let _a = cfg!(unsafe(foo)); + | ^^^^^^ expected identifier, found keyword + | +help: escape `unsafe` to use it as an identifier + | +LL | let _a = cfg!(r#unsafe(foo)); + | ++ + +error[E0537]: invalid predicate `r#unsafe` + --> $DIR/extraneous-unsafe-attributes.rs:31:19 + | +LL | let _a = cfg!(unsafe(foo)); + | ^^^^^^^^^^^ + error: `ignore` is not an unsafe attribute --> $DIR/extraneous-unsafe-attributes.rs:13:3 | @@ -62,5 +79,6 @@ LL | #[unsafe(used)] | = note: extraneous unsafe is not allowed in attributes -error: aborting due to 8 previous errors +error: aborting due to 10 previous errors +For more information about this error, try `rustc --explain E0537`. diff --git a/tests/ui/check-cfg/invalid-arguments.rs b/tests/ui/check-cfg/invalid-arguments.rs index b8588ecb4ff..c6b1218ce27 100644 --- a/tests/ui/check-cfg/invalid-arguments.rs +++ b/tests/ui/check-cfg/invalid-arguments.rs @@ -8,7 +8,7 @@ //@ revisions: values_any_missing_values values_any_before_ident ident_in_values_1 //@ revisions: ident_in_values_2 unknown_meta_item_1 unknown_meta_item_2 unknown_meta_item_3 //@ revisions: mixed_values_any mixed_any any_values giberich unterminated -//@ revisions: none_not_empty cfg_none +//@ revisions: none_not_empty cfg_none unsafe_attr // //@ [anything_else]compile-flags: --check-cfg=anything_else(...) //@ [boolean]compile-flags: --check-cfg=cfg(true) @@ -33,5 +33,6 @@ //@ [cfg_none]compile-flags: --check-cfg=cfg(none()) //@ [giberich]compile-flags: --check-cfg=cfg(...) //@ [unterminated]compile-flags: --check-cfg=cfg( +//@ [unsafe_attr]compile-flags: --check-cfg=unsafe(cfg(foo)) fn main() {} diff --git a/tests/ui/check-cfg/invalid-arguments.unsafe_attr.stderr b/tests/ui/check-cfg/invalid-arguments.unsafe_attr.stderr new file mode 100644 index 00000000000..5236ed6f605 --- /dev/null +++ b/tests/ui/check-cfg/invalid-arguments.unsafe_attr.stderr @@ -0,0 +1,5 @@ +error: invalid `--check-cfg` argument: `unsafe(cfg(foo))` + | + = note: expected `cfg(name, values("value1", "value2", ... "valueN"))` + = note: visit for more details + -- cgit 1.4.1-3-g733a5 From f48194ea5578802c786edff59dd72388da0e6305 Mon Sep 17 00:00:00 2001 From: David Lattimore Date: Tue, 1 Oct 2024 08:55:10 +1000 Subject: Replace -Z default-hidden-visibility with -Z default-visibility MCP: https://github.com/rust-lang/compiler-team/issues/782 Co-authored-by: bjorn3 <17426603+bjorn3@users.noreply.github.com> --- compiler/rustc_codegen_gcc/src/allocator.rs | 13 +++- compiler/rustc_codegen_llvm/src/allocator.rs | 22 ++++--- compiler/rustc_codegen_llvm/src/declare.rs | 13 +--- compiler/rustc_codegen_llvm/src/llvm/ffi.rs | 11 ++++ compiler/rustc_interface/src/tests.rs | 2 +- compiler/rustc_middle/src/mir/mono.rs | 11 ++++ compiler/rustc_monomorphize/src/partitioning.rs | 34 +++++------ compiler/rustc_session/src/config.rs | 4 +- compiler/rustc_session/src/options.rs | 24 ++++++-- compiler/rustc_session/src/session.rs | 12 ++-- compiler/rustc_target/src/spec/mod.rs | 69 +++++++++++++++++++--- .../compiler-flags/default-hidden-visibility.md | 12 ---- .../src/compiler-flags/default-visibility.md | 44 ++++++++++++++ tests/codegen/default-hidden-visibility.rs | 31 ---------- tests/codegen/default-visibility.rs | 33 +++++++++++ 15 files changed, 231 insertions(+), 104 deletions(-) delete mode 100644 src/doc/unstable-book/src/compiler-flags/default-hidden-visibility.md create mode 100644 src/doc/unstable-book/src/compiler-flags/default-visibility.md delete mode 100644 tests/codegen/default-hidden-visibility.rs create mode 100644 tests/codegen/default-visibility.rs (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_codegen_gcc/src/allocator.rs b/compiler/rustc_codegen_gcc/src/allocator.rs index e9498857fb9..f13a75648ae 100644 --- a/compiler/rustc_codegen_gcc/src/allocator.rs +++ b/compiler/rustc_codegen_gcc/src/allocator.rs @@ -104,10 +104,17 @@ fn create_wrapper_function( false, ); - if tcx.sess.default_hidden_visibility() { - #[cfg(feature = "master")] - func.add_attribute(FnAttribute::Visibility(gccjit::Visibility::Hidden)); + #[cfg(feature = "master")] + match tcx.sess.default_visibility() { + rustc_target::spec::SymbolVisibility::Hidden => { + func.add_attribute(FnAttribute::Visibility(gccjit::Visibility::Hidden)) + } + rustc_target::spec::SymbolVisibility::Protected => { + func.add_attribute(FnAttribute::Visibility(gccjit::Visibility::Protected)) + } + rustc_target::spec::SymbolVisibility::Interposable => {} } + if tcx.sess.must_emit_unwind_tables() { // TODO(antoyo): emit unwind tables. } diff --git a/compiler/rustc_codegen_llvm/src/allocator.rs b/compiler/rustc_codegen_llvm/src/allocator.rs index 2adac278c62..89f5305840b 100644 --- a/compiler/rustc_codegen_llvm/src/allocator.rs +++ b/compiler/rustc_codegen_llvm/src/allocator.rs @@ -77,18 +77,20 @@ pub(crate) unsafe fn codegen( // __rust_alloc_error_handler_should_panic let name = OomStrategy::SYMBOL; let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8); - if tcx.sess.default_hidden_visibility() { - llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden); - } + llvm::LLVMRustSetVisibility( + ll_g, + llvm::Visibility::from_generic(tcx.sess.default_visibility()), + ); let val = tcx.sess.opts.unstable_opts.oom.should_panic(); let llval = llvm::LLVMConstInt(i8, val as u64, False); llvm::LLVMSetInitializer(ll_g, llval); let name = NO_ALLOC_SHIM_IS_UNSTABLE; let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8); - if tcx.sess.default_hidden_visibility() { - llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden); - } + llvm::LLVMRustSetVisibility( + ll_g, + llvm::Visibility::from_generic(tcx.sess.default_visibility()), + ); let llval = llvm::LLVMConstInt(i8, 0, False); llvm::LLVMSetInitializer(ll_g, llval); } @@ -132,9 +134,11 @@ fn create_wrapper_function( None }; - if tcx.sess.default_hidden_visibility() { - llvm::LLVMRustSetVisibility(llfn, llvm::Visibility::Hidden); - } + llvm::LLVMRustSetVisibility( + llfn, + llvm::Visibility::from_generic(tcx.sess.default_visibility()), + ); + if tcx.sess.must_emit_unwind_tables() { let uwtable = attributes::uwtable_attr(llcx, tcx.sess.opts.unstable_opts.use_sync_unwind); diff --git a/compiler/rustc_codegen_llvm/src/declare.rs b/compiler/rustc_codegen_llvm/src/declare.rs index b0b29ca1280..7be44dd51b5 100644 --- a/compiler/rustc_codegen_llvm/src/declare.rs +++ b/compiler/rustc_codegen_llvm/src/declare.rs @@ -22,6 +22,7 @@ use tracing::debug; use crate::abi::{FnAbi, FnAbiLlvmExt}; use crate::context::CodegenCx; use crate::llvm::AttributePlace::Function; +use crate::llvm::Visibility; use crate::type_::Type; use crate::value::Value; use crate::{attributes, llvm}; @@ -84,11 +85,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> { fn_type: &'ll Type, ) -> &'ll Value { // Declare C ABI functions with the visibility used by C by default. - let visibility = if self.tcx.sess.default_hidden_visibility() { - llvm::Visibility::Hidden - } else { - llvm::Visibility::Default - }; + let visibility = Visibility::from_generic(self.tcx.sess.default_visibility()); declare_raw_fn(self, name, llvm::CCallConv, unnamed, visibility, fn_type) } @@ -107,11 +104,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> { unnamed: llvm::UnnamedAddr, fn_type: &'ll Type, ) -> &'ll Value { - let visibility = if self.tcx.sess.default_hidden_visibility() { - llvm::Visibility::Hidden - } else { - llvm::Visibility::Default - }; + let visibility = Visibility::from_generic(self.tcx.sess.default_visibility()); declare_raw_fn(self, name, callconv, unnamed, visibility, fn_type) } diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs index 9aabfd794ba..d3950df91fb 100644 --- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs +++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs @@ -4,6 +4,7 @@ use std::marker::PhantomData; use libc::{c_char, c_int, c_uint, c_ulonglong, c_void, size_t}; +use rustc_target::spec::SymbolVisibility; use super::RustString; use super::debuginfo::{ @@ -133,6 +134,16 @@ pub enum Visibility { Protected = 2, } +impl Visibility { + pub fn from_generic(visibility: SymbolVisibility) -> Self { + match visibility { + SymbolVisibility::Hidden => Visibility::Hidden, + SymbolVisibility::Protected => Visibility::Protected, + SymbolVisibility::Interposable => Visibility::Default, + } + } +} + /// LLVMUnnamedAddr #[repr(C)] pub enum UnnamedAddr { diff --git a/compiler/rustc_interface/src/tests.rs b/compiler/rustc_interface/src/tests.rs index 57aa3deae80..895897eca6b 100644 --- a/compiler/rustc_interface/src/tests.rs +++ b/compiler/rustc_interface/src/tests.rs @@ -770,7 +770,7 @@ fn test_unstable_options_tracking_hash() { tracked!(crate_attr, vec!["abc".to_string()]); tracked!(cross_crate_inline_threshold, InliningThreshold::Always); tracked!(debug_info_for_profiling, true); - tracked!(default_hidden_visibility, Some(true)); + tracked!(default_visibility, Some(rustc_target::spec::SymbolVisibility::Hidden)); tracked!(dep_info_omit_d_target, true); tracked!(direct_access_external_data, Some(true)); tracked!(dual_proc_macros, true); diff --git a/compiler/rustc_middle/src/mir/mono.rs b/compiler/rustc_middle/src/mir/mono.rs index 954f746ce5b..56ca9167d4d 100644 --- a/compiler/rustc_middle/src/mir/mono.rs +++ b/compiler/rustc_middle/src/mir/mono.rs @@ -15,6 +15,7 @@ use rustc_query_system::ich::StableHashingContext; use rustc_session::config::OptLevel; use rustc_span::Span; use rustc_span::symbol::Symbol; +use rustc_target::spec::SymbolVisibility; use tracing::debug; use crate::dep_graph::{DepNode, WorkProduct, WorkProductId}; @@ -305,6 +306,16 @@ pub enum Visibility { Protected, } +impl From for Visibility { + fn from(value: SymbolVisibility) -> Self { + match value { + SymbolVisibility::Hidden => Visibility::Hidden, + SymbolVisibility::Protected => Visibility::Protected, + SymbolVisibility::Interposable => Visibility::Default, + } + } +} + impl<'tcx> CodegenUnit<'tcx> { #[inline] pub fn new(name: Symbol) -> CodegenUnit<'tcx> { diff --git a/compiler/rustc_monomorphize/src/partitioning.rs b/compiler/rustc_monomorphize/src/partitioning.rs index ad05cca66ca..5bd484d7bb0 100644 --- a/compiler/rustc_monomorphize/src/partitioning.rs +++ b/compiler/rustc_monomorphize/src/partitioning.rs @@ -904,26 +904,22 @@ fn mono_item_visibility<'tcx>( } fn default_visibility(tcx: TyCtxt<'_>, id: DefId, is_generic: bool) -> Visibility { - if !tcx.sess.default_hidden_visibility() { - return Visibility::Default; - } - - // Generic functions never have export-level C. - if is_generic { - return Visibility::Hidden; - } - - // Things with export level C don't get instantiated in - // downstream crates. - if !id.is_local() { - return Visibility::Hidden; - } + let export_level = if is_generic { + // Generic functions never have export-level C. + SymbolExportLevel::Rust + } else { + match tcx.reachable_non_generics(id.krate).get(&id) { + Some(SymbolExportInfo { level: SymbolExportLevel::C, .. }) => SymbolExportLevel::C, + _ => SymbolExportLevel::Rust, + } + }; + match export_level { + // C-export level items remain at `Default` to allow C code to + // access and interpose them. + SymbolExportLevel::C => Visibility::Default, - // C-export level items remain at `Default`, all other internal - // items become `Hidden`. - match tcx.reachable_non_generics(id.krate).get(&id) { - Some(SymbolExportInfo { level: SymbolExportLevel::C, .. }) => Visibility::Default, - _ => Visibility::Hidden, + // For all other symbols, `default_visibility` determines which visibility to use. + SymbolExportLevel::Rust => tcx.sess.default_visibility().into(), } } diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs index b052d8d72c7..0d293415aa9 100644 --- a/compiler/rustc_session/src/config.rs +++ b/compiler/rustc_session/src/config.rs @@ -3008,7 +3008,8 @@ pub(crate) mod dep_tracking { use rustc_span::edition::Edition; use rustc_target::spec::{ CodeModel, FramePointer, MergeFunctions, OnBrokenPipe, PanicStrategy, RelocModel, - RelroLevel, SanitizerSet, SplitDebuginfo, StackProtector, TargetTriple, TlsModel, WasmCAbi, + RelroLevel, SanitizerSet, SplitDebuginfo, StackProtector, SymbolVisibility, TargetTriple, + TlsModel, WasmCAbi, }; use super::{ @@ -3101,6 +3102,7 @@ pub(crate) mod dep_tracking { StackProtector, SwitchWithOptPath, SymbolManglingVersion, + SymbolVisibility, RemapPathScopeComponents, SourceFileHashAlgorithm, OutFileName, diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs index aac776d2919..1de09b8be4d 100644 --- a/compiler/rustc_session/src/options.rs +++ b/compiler/rustc_session/src/options.rs @@ -13,8 +13,8 @@ use rustc_span::edition::Edition; use rustc_span::{RealFileName, SourceFileHashAlgorithm}; use rustc_target::spec::{ CodeModel, FramePointer, LinkerFlavorCli, MergeFunctions, OnBrokenPipe, PanicStrategy, - RelocModel, RelroLevel, SanitizerSet, SplitDebuginfo, StackProtector, TargetTriple, TlsModel, - WasmCAbi, + RelocModel, RelroLevel, SanitizerSet, SplitDebuginfo, StackProtector, SymbolVisibility, + TargetTriple, TlsModel, WasmCAbi, }; use crate::config::*; @@ -416,6 +416,8 @@ mod desc { "one of: `disabled`, `trampolines`, or `aliases`"; pub(crate) const parse_symbol_mangling_version: &str = "one of: `legacy`, `v0` (RFC 2603), or `hashed`"; + pub(crate) const parse_opt_symbol_visibility: &str = + "one of: `hidden`, `protected`, or `interposable`"; pub(crate) const parse_src_file_hash: &str = "either `md5` or `sha1`"; pub(crate) const parse_relocation_model: &str = "one of supported relocation models (`rustc --print relocation-models`)"; @@ -922,6 +924,20 @@ mod parse { true } + pub(crate) fn parse_opt_symbol_visibility( + slot: &mut Option, + v: Option<&str>, + ) -> bool { + if let Some(v) = v { + if let Ok(vis) = SymbolVisibility::from_str(v) { + *slot = Some(vis); + } else { + return false; + } + } + true + } + pub(crate) fn parse_optimization_fuel( slot: &mut Option<(String, u64)>, v: Option<&str>, @@ -1688,8 +1704,8 @@ options! { "compress debug info sections (none, zlib, zstd, default: none)"), deduplicate_diagnostics: bool = (true, parse_bool, [UNTRACKED], "deduplicate identical diagnostics (default: yes)"), - default_hidden_visibility: Option = (None, parse_opt_bool, [TRACKED], - "overrides the `default_hidden_visibility` setting of the target"), + default_visibility: Option = (None, parse_opt_symbol_visibility, [TRACKED], + "overrides the `default_visibility` setting of the target"), dep_info_omit_d_target: bool = (false, parse_bool, [TRACKED], "in dep-info output, omit targets for tracking dependencies of the dep-info files \ themselves (default: no)"), diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs index adc28e38462..d67e69fe0fb 100644 --- a/compiler/rustc_session/src/session.rs +++ b/compiler/rustc_session/src/session.rs @@ -31,7 +31,8 @@ use rustc_span::{FileNameDisplayPreference, RealFileName, Span, Symbol}; use rustc_target::asm::InlineAsmArch; use rustc_target::spec::{ CodeModel, DebuginfoKind, PanicStrategy, RelocModel, RelroLevel, SanitizerSet, - SmallDataThresholdSupport, SplitDebuginfo, StackProtector, Target, TargetTriple, TlsModel, + SmallDataThresholdSupport, SplitDebuginfo, StackProtector, SymbolVisibility, Target, + TargetTriple, TlsModel, }; use crate::code_stats::CodeStats; @@ -617,12 +618,13 @@ impl Session { } } - /// Whether the default visibility of symbols should be "hidden" rather than "default". - pub fn default_hidden_visibility(&self) -> bool { + /// Returns the default symbol visibility. + pub fn default_visibility(&self) -> SymbolVisibility { self.opts .unstable_opts - .default_hidden_visibility - .unwrap_or(self.target.options.default_hidden_visibility) + .default_visibility + .or(self.target.options.default_visibility) + .unwrap_or(SymbolVisibility::Interposable) } } diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs index f327c1fd179..d1fcfe4adef 100644 --- a/compiler/rustc_target/src/spec/mod.rs +++ b/compiler/rustc_target/src/spec/mod.rs @@ -830,6 +830,46 @@ impl RelroLevel { } } +#[derive(Clone, Copy, Debug, PartialEq, Hash)] +pub enum SymbolVisibility { + Hidden, + Protected, + Interposable, +} + +impl SymbolVisibility { + pub fn desc(&self) -> &str { + match *self { + SymbolVisibility::Hidden => "hidden", + SymbolVisibility::Protected => "protected", + SymbolVisibility::Interposable => "interposable", + } + } +} + +impl FromStr for SymbolVisibility { + type Err = (); + + fn from_str(s: &str) -> Result { + match s { + "hidden" => Ok(SymbolVisibility::Hidden), + "protected" => Ok(SymbolVisibility::Protected), + "interposable" => Ok(SymbolVisibility::Interposable), + _ => Err(()), + } + } +} + +impl ToJson for SymbolVisibility { + fn to_json(&self) -> Json { + match *self { + SymbolVisibility::Hidden => "hidden".to_json(), + SymbolVisibility::Protected => "protected".to_json(), + SymbolVisibility::Interposable => "interposable".to_json(), + } + } +} + impl FromStr for RelroLevel { type Err = (); @@ -2326,13 +2366,12 @@ pub struct TargetOptions { /// for this target unconditionally. pub no_builtins: bool, - /// The default visibility for symbols in this target should be "hidden" - /// rather than "default". + /// The default visibility for symbols in this target. /// - /// This value typically shouldn't be accessed directly, but through - /// the `rustc_session::Session::default_hidden_visibility` method, which - /// allows `rustc` users to override this setting using cmdline flags. - pub default_hidden_visibility: bool, + /// This value typically shouldn't be accessed directly, but through the + /// `rustc_session::Session::default_visibility` method, which allows `rustc` users to override + /// this setting using cmdline flags. + pub default_visibility: Option, /// Whether a .debug_gdb_scripts section will be added to the output object file pub emit_debug_gdb_scripts: bool, @@ -2623,7 +2662,7 @@ impl Default for TargetOptions { requires_lto: false, singlethread: false, no_builtins: false, - default_hidden_visibility: false, + default_visibility: None, emit_debug_gdb_scripts: true, requires_uwtable: false, default_uwtable: false, @@ -2963,6 +3002,18 @@ impl Target { Some(Ok(())) })).unwrap_or(Ok(())) } ); + ($key_name:ident, Option) => ( { + let name = (stringify!($key_name)).replace("_", "-"); + obj.remove(&name).and_then(|o| o.as_str().and_then(|s| { + match s.parse::() { + Ok(level) => base.$key_name = Some(level), + _ => return Some(Err(format!("'{}' is not a valid value for \ + symbol-visibility. Use 'hidden', 'protected, or 'interposable'.", + s))), + } + Some(Ok(())) + })).unwrap_or(Ok(())) + } ); ($key_name:ident, DebuginfoKind) => ( { let name = (stringify!($key_name)).replace("_", "-"); obj.remove(&name).and_then(|o| o.as_str().and_then(|s| { @@ -3353,7 +3404,7 @@ impl Target { key!(requires_lto, bool); key!(singlethread, bool); key!(no_builtins, bool); - key!(default_hidden_visibility, bool); + key!(default_visibility, Option)?; key!(emit_debug_gdb_scripts, bool); key!(requires_uwtable, bool); key!(default_uwtable, bool); @@ -3633,7 +3684,7 @@ impl ToJson for Target { target_option_val!(requires_lto); target_option_val!(singlethread); target_option_val!(no_builtins); - target_option_val!(default_hidden_visibility); + target_option_val!(default_visibility); target_option_val!(emit_debug_gdb_scripts); target_option_val!(requires_uwtable); target_option_val!(default_uwtable); diff --git a/src/doc/unstable-book/src/compiler-flags/default-hidden-visibility.md b/src/doc/unstable-book/src/compiler-flags/default-hidden-visibility.md deleted file mode 100644 index 579add4a9d9..00000000000 --- a/src/doc/unstable-book/src/compiler-flags/default-hidden-visibility.md +++ /dev/null @@ -1,12 +0,0 @@ -# `default-hidden-visibility` - -The tracking issue for this feature is: https://github.com/rust-lang/compiler-team/issues/656 - ------------------------- - -This flag can be used to override the target's -[`default_hidden_visibility`](https://doc.rust-lang.org/beta/nightly-rustc/rustc_target/spec/struct.TargetOptions.html#structfield.default_hidden_visibility) -setting. -Using `-Zdefault_hidden_visibility=yes` is roughly equivalent to Clang's -[`-fvisibility=hidden`](https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fvisibility) -cmdline flag. diff --git a/src/doc/unstable-book/src/compiler-flags/default-visibility.md b/src/doc/unstable-book/src/compiler-flags/default-visibility.md new file mode 100644 index 00000000000..ad9e5d84bba --- /dev/null +++ b/src/doc/unstable-book/src/compiler-flags/default-visibility.md @@ -0,0 +1,44 @@ +# `default-visibility` + +The tracking issue for this feature is: https://github.com/rust-lang/rust/issues/131090 + +------------------------ + +This flag can be used to override the target's +[`default_visibility`](https://doc.rust-lang.org/beta/nightly-rustc/rustc_target/spec/struct.TargetOptions.html#structfield.default_visibility) +setting. + +This option only affects building of shared objects and should have no effect on executables. + +Visibility an be set to one of three options: + +* protected +* hidden +* interposable + +## Hidden visibility + +Using `-Zdefault-visibility=hidden` is roughly equivalent to Clang's +[`-fvisibility=hidden`](https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fvisibility) +cmdline flag. Hidden symbols will not be exported from the created shared object, so cannot be +referenced from other shared objects or from executables. + +## Protected visibility + +Using `-Zdefault-visibility=protected` will cause rust-mangled symbols to be emitted with +"protected" visibility. This signals the compiler, the linker and the runtime linker that these +symbols cannot be overridden by the executable or by other shared objects earlier in the load order. + +This will allow the compiler to emit direct references to symbols, which may improve performance. It +also removes the need for these symbols to be resolved when a shared object built with this option +is loaded. + +Using protected visibility when linking with GNU ld prior to 2.40 will result in linker errors when +building for Linux. Other linkers such as LLD are not affected. + +## Interposable + +Using `-Zdefault-visibility=interposable` will cause symbols to be emitted with "default" +visibility. On platforms that support it, this makes it so that symbols can be interposed, which +means that they can be overridden by symbols with the same name from the executable or by other +shared objects earier in the load order. diff --git a/tests/codegen/default-hidden-visibility.rs b/tests/codegen/default-hidden-visibility.rs deleted file mode 100644 index 2bea8f62a40..00000000000 --- a/tests/codegen/default-hidden-visibility.rs +++ /dev/null @@ -1,31 +0,0 @@ -// Verifies that `Session::default_hidden_visibility` is affected when using the related cmdline -// flag. This is a regression test for https://github.com/rust-lang/compiler-team/issues/656. See -// also https://github.com/rust-lang/rust/issues/73295 and -// https://github.com/rust-lang/rust/issues/37530. - -//@ revisions:DEFAULT YES NO -//@[YES] compile-flags: -Zdefault-hidden-visibility=yes -//@[NO] compile-flags: -Zdefault-hidden-visibility=no - -// The test scenario is specifically about visibility of symbols exported out of dynamically linked -// libraries. -#![crate_type = "dylib"] - -// The test scenario needs to use a Rust-public, but non-explicitly-exported symbol -// (e.g. the test doesn't use `#[no_mangle]`, because currently it implies that -// the symbol should be exported; we don't want that - we want to test the *default* -// export setting instead). -#[used] -pub static tested_symbol: [u8; 6] = *b"foobar"; - -// Exact LLVM IR differs depending on the target triple (e.g. `hidden constant` -// vs `internal constant` vs `constant`). Because of this, we only apply the -// specific test expectations below to one specific target triple. If needed, -// additional targets can be covered by adding copies of this test file with -// a different `only-X` directive. -// -//@ only-x86_64-unknown-linux-gnu - -// DEFAULT: @{{.*}}default_hidden_visibility{{.*}}tested_symbol{{.*}} = constant -// YES: @{{.*}}default_hidden_visibility{{.*}}tested_symbol{{.*}} = hidden constant -// NO: @{{.*}}default_hidden_visibility{{.*}}tested_symbol{{.*}} = constant diff --git a/tests/codegen/default-visibility.rs b/tests/codegen/default-visibility.rs new file mode 100644 index 00000000000..884d386ec20 --- /dev/null +++ b/tests/codegen/default-visibility.rs @@ -0,0 +1,33 @@ +// Verifies that `Session::default_visibility` is affected when using the related cmdline +// flag. This is a regression test for https://github.com/rust-lang/compiler-team/issues/782. See +// also https://github.com/rust-lang/rust/issues/73295 and +// https://github.com/rust-lang/rust/issues/37530. + +//@ revisions:DEFAULT HIDDEN PROTECTED INTERPOSABLE +//@[HIDDEN] compile-flags: -Zdefault-visibility=hidden +//@[PROTECTED] compile-flags: -Zdefault-visibility=protected +//@[INTERPOSABLE] compile-flags: -Zdefault-visibility=interposable + +// The test scenario is specifically about visibility of symbols exported out of dynamically linked +// libraries. +#![crate_type = "dylib"] + +// The test scenario needs to use a Rust-public, but non-explicitly-exported symbol +// (e.g. the test doesn't use `#[no_mangle]`, because currently it implies that +// the symbol should be exported; we don't want that - we want to test the *default* +// export setting instead). +#[used] +pub static tested_symbol: [u8; 6] = *b"foobar"; + +// Exact LLVM IR differs depending on the target triple (e.g. `hidden constant` +// vs `internal constant` vs `constant`). Because of this, we only apply the +// specific test expectations below to one specific target triple. If needed, +// additional targets can be covered by adding copies of this test file with +// a different `only-X` directive. +// +//@ only-x86_64-unknown-linux-gnu + +// HIDDEN: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = hidden constant +// PROTECTED: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = protected constant +// INTERPOSABLE: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = constant +// DEFAULT: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = constant -- cgit 1.4.1-3-g733a5 From bb5a8276be2d3dbc97d0f52e90db15455d542edf Mon Sep 17 00:00:00 2001 From: Jacob Kiesel Date: Sat, 22 Jun 2024 01:27:59 -0600 Subject: add unstable support for outputting file checksums for use in cargo --- Cargo.lock | 26 ++++ .../rustc_codegen_llvm/src/debuginfo/metadata.rs | 1 + compiler/rustc_interface/src/interface.rs | 3 +- compiler/rustc_interface/src/lib.rs | 1 + compiler/rustc_interface/src/passes.rs | 105 +++++++++++++-- compiler/rustc_interface/src/tests.rs | 2 + compiler/rustc_metadata/src/rmeta/decoder.rs | 2 + .../rustc_query_system/src/ich/impls_syntax.rs | 2 + compiler/rustc_session/src/config.rs | 4 + compiler/rustc_session/src/options.rs | 22 +++- compiler/rustc_span/Cargo.toml | 1 + compiler/rustc_span/src/lib.rs | 146 ++++++++++++++++++++- compiler/rustc_span/src/source_map.rs | 16 ++- compiler/rustc_span/src/source_map/tests.rs | 2 + compiler/rustc_span/src/tests.rs | 10 +- src/tools/tidy/src/deps.rs | 6 + 16 files changed, 321 insertions(+), 28 deletions(-) (limited to 'compiler/rustc_interface') diff --git a/Cargo.lock b/Cargo.lock index 6c1071ccbc2..6348046751a 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -199,6 +199,12 @@ dependencies = [ "object 0.36.4", ] +[[package]] +name = "arrayref" +version = "0.3.7" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "6b4930d2cb77ce62f89ee5d5289b4ac049559b1c45539271f5ed4fdc7db34545" + [[package]] name = "arrayvec" version = "0.7.6" @@ -262,6 +268,19 @@ version = "2.6.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de" +[[package]] +name = "blake3" +version = "1.5.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3d08263faac5cde2a4d52b513dadb80846023aade56fcd8fc99ba73ba8050e92" +dependencies = [ + "arrayref", + "arrayvec", + "cc", + "cfg-if", + "constant_time_eq", +] + [[package]] name = "block-buffer" version = "0.10.4" @@ -719,6 +738,12 @@ dependencies = [ "windows-sys 0.52.0", ] +[[package]] +name = "constant_time_eq" +version = "0.3.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f7144d30dcf0fafbce74250a3963025d8d52177934239851c917d29f1df280c2" + [[package]] name = "core-foundation-sys" version = "0.8.7" @@ -4374,6 +4399,7 @@ dependencies = [ name = "rustc_span" version = "0.0.0" dependencies = [ + "blake3", "derive-where", "indexmap", "itoa", diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs index 964b83c0fa0..b7a6f80956d 100644 --- a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs +++ b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs @@ -630,6 +630,7 @@ pub(crate) fn file_metadata<'ll>(cx: &CodegenCx<'ll, '_>, source_file: &SourceFi rustc_span::SourceFileHashAlgorithm::Md5 => llvm::ChecksumKind::MD5, rustc_span::SourceFileHashAlgorithm::Sha1 => llvm::ChecksumKind::SHA1, rustc_span::SourceFileHashAlgorithm::Sha256 => llvm::ChecksumKind::SHA256, + rustc_span::SourceFileHashAlgorithm::Blake3 => llvm::ChecksumKind::None, }; let hash_value = hex_encode(source_file.src_hash.hash_bytes()); diff --git a/compiler/rustc_interface/src/interface.rs b/compiler/rustc_interface/src/interface.rs index bd38b3c109a..3920d3077d3 100644 --- a/compiler/rustc_interface/src/interface.rs +++ b/compiler/rustc_interface/src/interface.rs @@ -389,12 +389,13 @@ pub fn run_compiler(config: Config, f: impl FnOnce(&Compiler) -> R + Se let file_loader = config.file_loader.unwrap_or_else(|| Box::new(RealFileLoader)); let path_mapping = config.opts.file_path_mapping(); let hash_kind = config.opts.unstable_opts.src_hash_algorithm(&target); + let checksum_hash_kind = config.opts.unstable_opts.checksum_hash_algorithm(); util::run_in_thread_pool_with_globals( &early_dcx, config.opts.edition, config.opts.unstable_opts.threads, - SourceMapInputs { file_loader, path_mapping, hash_kind }, + SourceMapInputs { file_loader, path_mapping, hash_kind, checksum_hash_kind }, |current_gcx| { // The previous `early_dcx` can't be reused here because it doesn't // impl `Send`. Creating a new one is fine. diff --git a/compiler/rustc_interface/src/lib.rs b/compiler/rustc_interface/src/lib.rs index b81a7402701..1c4dda2a436 100644 --- a/compiler/rustc_interface/src/lib.rs +++ b/compiler/rustc_interface/src/lib.rs @@ -1,6 +1,7 @@ // tidy-alphabetical-start #![feature(decl_macro)] #![feature(file_buffered)] +#![feature(iter_intersperse)] #![feature(let_chains)] #![feature(try_blocks)] #![warn(unreachable_pub)] diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index 84b320975bb..b9b65755db5 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -32,8 +32,8 @@ use rustc_session::cstore::Untracked; use rustc_session::output::{collect_crate_types, filename_for_input, find_crate_name}; use rustc_session::search_paths::PathKind; use rustc_session::{Limit, Session}; -use rustc_span::FileName; use rustc_span::symbol::{Symbol, sym}; +use rustc_span::{FileName, SourceFileHash, SourceFileHashAlgorithm}; use rustc_target::spec::PanicStrategy; use rustc_trait_selection::traits; use tracing::{info, instrument}; @@ -417,15 +417,23 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P let result: io::Result<()> = try { // Build a list of files used to compile the output and // write Makefile-compatible dependency rules - let mut files: Vec = sess + let mut files: Vec<(String, u64, Option)> = sess .source_map() .files() .iter() .filter(|fmap| fmap.is_real_file()) .filter(|fmap| !fmap.is_imported()) - .map(|fmap| escape_dep_filename(&fmap.name.prefer_local().to_string())) + .map(|fmap| { + ( + escape_dep_filename(&fmap.name.prefer_local().to_string()), + fmap.source_len.0 as u64, + fmap.checksum_hash, + ) + }) .collect(); + let checksum_hash_algo = sess.opts.unstable_opts.checksum_hash_algorithm; + // Account for explicitly marked-to-track files // (e.g. accessed in proc macros). let file_depinfo = sess.psess.file_depinfo.borrow(); @@ -437,22 +445,58 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P // The entries will be used to declare dependencies between files in a // Makefile-like output, so the iteration order does not matter. + fn hash_iter_files>( + it: impl Iterator, + checksum_hash_algo: Option, + ) -> impl Iterator)> { + it.map(move |path| { + match checksum_hash_algo.and_then(|algo| { + fs::File::open(path.as_ref()) + .and_then(|mut file| { + SourceFileHash::new(algo, &mut file).map(|h| (file, h)) + }) + .and_then(|(file, h)| file.metadata().map(|m| (m.len(), h))) + .map_err(|e| { + tracing::error!( + "failed to compute checksum, omitting it from dep-info {} {e}", + path.as_ref().display() + ) + }) + .ok() + }) { + Some((file_len, checksum)) => (path, file_len, Some(checksum)), + None => (path, 0, None), + } + }) + } + #[allow(rustc::potential_query_instability)] - let extra_tracked_files = - file_depinfo.iter().map(|path_sym| normalize_path(PathBuf::from(path_sym.as_str()))); + let extra_tracked_files = hash_iter_files( + file_depinfo.iter().map(|path_sym| normalize_path(PathBuf::from(path_sym.as_str()))), + checksum_hash_algo, + ); files.extend(extra_tracked_files); // We also need to track used PGO profile files if let Some(ref profile_instr) = sess.opts.cg.profile_use { - files.push(normalize_path(profile_instr.as_path().to_path_buf())); + files.extend(hash_iter_files( + iter::once(normalize_path(profile_instr.as_path().to_path_buf())), + checksum_hash_algo, + )); } if let Some(ref profile_sample) = sess.opts.unstable_opts.profile_sample_use { - files.push(normalize_path(profile_sample.as_path().to_path_buf())); + files.extend(hash_iter_files( + iter::once(normalize_path(profile_sample.as_path().to_path_buf())), + checksum_hash_algo, + )); } // Debugger visualizer files for debugger_visualizer in tcx.debugger_visualizers(LOCAL_CRATE) { - files.push(normalize_path(debugger_visualizer.path.clone().unwrap())); + files.extend(hash_iter_files( + iter::once(normalize_path(debugger_visualizer.path.clone().unwrap())), + checksum_hash_algo, + )); } if sess.binary_dep_depinfo() { @@ -460,33 +504,54 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P if backend.contains('.') { // If the backend name contain a `.`, it is the path to an external dynamic // library. If not, it is not a path. - files.push(backend.to_string()); + files.extend(hash_iter_files( + iter::once(backend.to_string()), + checksum_hash_algo, + )); } } for &cnum in tcx.crates(()) { let source = tcx.used_crate_source(cnum); if let Some((path, _)) = &source.dylib { - files.push(escape_dep_filename(&path.display().to_string())); + files.extend(hash_iter_files( + iter::once(escape_dep_filename(&path.display().to_string())), + checksum_hash_algo, + )); } if let Some((path, _)) = &source.rlib { - files.push(escape_dep_filename(&path.display().to_string())); + files.extend(hash_iter_files( + iter::once(escape_dep_filename(&path.display().to_string())), + checksum_hash_algo, + )); } if let Some((path, _)) = &source.rmeta { - files.push(escape_dep_filename(&path.display().to_string())); + files.extend(hash_iter_files( + iter::once(escape_dep_filename(&path.display().to_string())), + checksum_hash_algo, + )); } } } let write_deps_to_file = |file: &mut dyn Write| -> io::Result<()> { for path in out_filenames { - writeln!(file, "{}: {}\n", path.display(), files.join(" "))?; + writeln!( + file, + "{}: {}\n", + path.display(), + files + .iter() + .map(|(path, _file_len, _checksum_hash_algo)| path.as_str()) + .intersperse(" ") + .collect::() + )?; } // Emit a fake target for each input file to the compilation. This // prevents `make` from spitting out an error if a file is later // deleted. For more info see #28735 - for path in files { + for (path, _file_len, _checksum_hash_algo) in &files { writeln!(file, "{path}:")?; } @@ -510,6 +575,18 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P } } + // If caller requested this information, add special comments about source file checksums. + // These are not necessarily the same checksums as was used in the debug files. + if sess.opts.unstable_opts.checksum_hash_algorithm().is_some() { + for (path, file_len, checksum_hash) in + files.iter().filter_map(|(path, file_len, hash_algo)| { + hash_algo.map(|hash_algo| (path, file_len, hash_algo)) + }) + { + writeln!(file, "# checksum:{checksum_hash} file_len:{file_len} {path}")?; + } + } + Ok(()) }; diff --git a/compiler/rustc_interface/src/tests.rs b/compiler/rustc_interface/src/tests.rs index 895897eca6b..536ce154cd0 100644 --- a/compiler/rustc_interface/src/tests.rs +++ b/compiler/rustc_interface/src/tests.rs @@ -44,10 +44,12 @@ where let sysroot = filesearch::materialize_sysroot(sessopts.maybe_sysroot.clone()); let target = rustc_session::config::build_target_config(&early_dcx, &sessopts, &sysroot); let hash_kind = sessopts.unstable_opts.src_hash_algorithm(&target); + let checksum_hash_kind = sessopts.unstable_opts.checksum_hash_algorithm(); let sm_inputs = Some(SourceMapInputs { file_loader: Box::new(RealFileLoader) as _, path_mapping: sessopts.file_path_mapping(), hash_kind, + checksum_hash_kind, }); rustc_span::create_session_globals_then(DEFAULT_EDITION, sm_inputs, || { diff --git a/compiler/rustc_metadata/src/rmeta/decoder.rs b/compiler/rustc_metadata/src/rmeta/decoder.rs index 2157324d5cc..f02fd2ab6fe 100644 --- a/compiler/rustc_metadata/src/rmeta/decoder.rs +++ b/compiler/rustc_metadata/src/rmeta/decoder.rs @@ -1702,6 +1702,7 @@ impl<'a> CrateMetadataRef<'a> { let rustc_span::SourceFile { mut name, src_hash, + checksum_hash, start_pos: original_start_pos, source_len, lines, @@ -1752,6 +1753,7 @@ impl<'a> CrateMetadataRef<'a> { let local_version = sess.source_map().new_imported_source_file( name, src_hash, + checksum_hash, stable_id, source_len.to_u32(), self.cnum, diff --git a/compiler/rustc_query_system/src/ich/impls_syntax.rs b/compiler/rustc_query_system/src/ich/impls_syntax.rs index 8d7a6e4fa9b..5e450979273 100644 --- a/compiler/rustc_query_system/src/ich/impls_syntax.rs +++ b/compiler/rustc_query_system/src/ich/impls_syntax.rs @@ -68,6 +68,8 @@ impl<'a> HashStable> for SourceFile { // Do not hash the source as it is not encoded src: _, ref src_hash, + // Already includes src_hash, this is redundant + checksum_hash: _, external_src: _, start_pos: _, source_len: _, diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs index 0d293415aa9..d2c03e588ff 100644 --- a/compiler/rustc_session/src/config.rs +++ b/compiler/rustc_session/src/config.rs @@ -1242,6 +1242,10 @@ impl UnstableOptions { } }) } + + pub fn checksum_hash_algorithm(&self) -> Option { + self.checksum_hash_algorithm + } } // The type of entry function, so users can have their own entry functions diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs index 1de09b8be4d..a1d85dfad32 100644 --- a/compiler/rustc_session/src/options.rs +++ b/compiler/rustc_session/src/options.rs @@ -418,7 +418,8 @@ mod desc { "one of: `legacy`, `v0` (RFC 2603), or `hashed`"; pub(crate) const parse_opt_symbol_visibility: &str = "one of: `hidden`, `protected`, or `interposable`"; - pub(crate) const parse_src_file_hash: &str = "either `md5` or `sha1`"; + pub(crate) const parse_cargo_src_file_hash: &str = "one of `md5`, `sha1`, or `sha256`"; + pub(crate) const parse_src_file_hash: &str = "one of `md5`, `sha1`, or `sha256`"; pub(crate) const parse_relocation_model: &str = "one of supported relocation models (`rustc --print relocation-models`)"; pub(crate) const parse_code_model: &str = @@ -1288,6 +1289,23 @@ mod parse { true } + pub(crate) fn parse_cargo_src_file_hash( + slot: &mut Option, + v: Option<&str>, + ) -> bool { + match v.and_then(|s| SourceFileHashAlgorithm::from_str(s).ok()) { + Some(hash_kind) => { + if hash_kind.supported_in_cargo() { + *slot = Some(hash_kind); + } else { + return false; + } + } + _ => return false, + } + true + } + pub(crate) fn parse_target_feature(slot: &mut String, v: Option<&str>) -> bool { match v { Some(s) => { @@ -1688,6 +1706,8 @@ options! { "instrument control-flow architecture protection"), check_cfg_all_expected: bool = (false, parse_bool, [UNTRACKED], "show all expected values in check-cfg diagnostics (default: no)"), + checksum_hash_algorithm: Option = (None, parse_cargo_src_file_hash, [TRACKED], + "hash algorithm of source files used to check freshness in cargo (`sha256`)"), codegen_backend: Option = (None, parse_opt_string, [TRACKED], "the backend to use"), combine_cgu: bool = (false, parse_bool, [TRACKED], diff --git a/compiler/rustc_span/Cargo.toml b/compiler/rustc_span/Cargo.toml index 3fdfe77ead9..c52d1fcc07f 100644 --- a/compiler/rustc_span/Cargo.toml +++ b/compiler/rustc_span/Cargo.toml @@ -5,6 +5,7 @@ edition = "2021" [dependencies] # tidy-alphabetical-start +blake3 = "1.5.2" derive-where = "1.2.7" indexmap = { version = "2.0.0" } itoa = "1.0" diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs index 9dbdab84a81..5ab1caaa220 100644 --- a/compiler/rustc_span/src/lib.rs +++ b/compiler/rustc_span/src/lib.rs @@ -75,7 +75,9 @@ pub mod profiling; use std::borrow::Cow; use std::cmp::{self, Ordering}; +use std::fmt::Display; use std::hash::Hash; +use std::io::{self, Read}; use std::ops::{Add, Range, Sub}; use std::path::{Path, PathBuf}; use std::str::FromStr; @@ -1395,6 +1397,27 @@ pub enum SourceFileHashAlgorithm { Md5, Sha1, Sha256, + Blake3, +} + +impl SourceFileHashAlgorithm { + pub fn supported_in_cargo(&self) -> bool { + match self { + Self::Md5 | Self::Sha1 => false, + Self::Sha256 | Self::Blake3 => true, + } + } +} + +impl Display for SourceFileHashAlgorithm { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(match self { + Self::Md5 => "md5", + Self::Sha1 => "sha1", + Self::Sha256 => "sha256", + Self::Blake3 => "blake3", + }) + } } impl FromStr for SourceFileHashAlgorithm { @@ -1405,12 +1428,13 @@ impl FromStr for SourceFileHashAlgorithm { "md5" => Ok(SourceFileHashAlgorithm::Md5), "sha1" => Ok(SourceFileHashAlgorithm::Sha1), "sha256" => Ok(SourceFileHashAlgorithm::Sha256), + "blake3" => Ok(SourceFileHashAlgorithm::Blake3), _ => Err(()), } } } -/// The hash of the on-disk source file used for debug info. +/// The hash of the on-disk source file used for debug info and cargo freshness checks. #[derive(Copy, Clone, PartialEq, Eq, Debug, Hash)] #[derive(HashStable_Generic, Encodable, Decodable)] pub struct SourceFileHash { @@ -1418,12 +1442,22 @@ pub struct SourceFileHash { value: [u8; 32], } +impl Display for SourceFileHash { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{}=", self.kind)?; + for byte in self.value[0..self.hash_len()].into_iter() { + write!(f, "{byte:02x}")?; + } + Ok(()) + } +} + impl SourceFileHash { - pub fn new(kind: SourceFileHashAlgorithm, src: &str) -> SourceFileHash { + pub fn new_in_memory(kind: SourceFileHashAlgorithm, src: impl AsRef<[u8]>) -> SourceFileHash { let mut hash = SourceFileHash { kind, value: Default::default() }; let len = hash.hash_len(); let value = &mut hash.value[..len]; - let data = src.as_bytes(); + let data = src.as_ref(); match kind { SourceFileHashAlgorithm::Md5 => { value.copy_from_slice(&Md5::digest(data)); @@ -1434,13 +1468,94 @@ impl SourceFileHash { SourceFileHashAlgorithm::Sha256 => { value.copy_from_slice(&Sha256::digest(data)); } - } + SourceFileHashAlgorithm::Blake3 => value.copy_from_slice(blake3::hash(data).as_bytes()), + }; hash } + pub fn new(kind: SourceFileHashAlgorithm, src: impl Read) -> Result { + let mut hash = SourceFileHash { kind, value: Default::default() }; + let len = hash.hash_len(); + let value = &mut hash.value[..len]; + // Buffer size is the recommended amount to fully leverage SIMD instructions on AVX-512 as per + // blake3 documentation. + let mut buf = vec![0; 16 * 1024]; + + fn digest( + mut hasher: T, + mut update: impl FnMut(&mut T, &[u8]), + finish: impl FnOnce(T, &mut [u8]), + mut src: impl Read, + buf: &mut [u8], + value: &mut [u8], + ) -> Result<(), io::Error> { + loop { + let bytes_read = src.read(buf)?; + if bytes_read == 0 { + break; + } + update(&mut hasher, &buf[0..bytes_read]); + } + finish(hasher, value); + Ok(()) + } + + match kind { + SourceFileHashAlgorithm::Sha256 => { + digest( + Sha256::new(), + |h, b| { + h.update(b); + }, + |h, out| out.copy_from_slice(&h.finalize()), + src, + &mut buf, + value, + )?; + } + SourceFileHashAlgorithm::Sha1 => { + digest( + Sha1::new(), + |h, b| { + h.update(b); + }, + |h, out| out.copy_from_slice(&h.finalize()), + src, + &mut buf, + value, + )?; + } + SourceFileHashAlgorithm::Md5 => { + digest( + Md5::new(), + |h, b| { + h.update(b); + }, + |h, out| out.copy_from_slice(&h.finalize()), + src, + &mut buf, + value, + )?; + } + SourceFileHashAlgorithm::Blake3 => { + digest( + blake3::Hasher::new(), + |h, b| { + h.update(b); + }, + |h, out| out.copy_from_slice(h.finalize().as_bytes()), + src, + &mut buf, + value, + )?; + } + } + Ok(hash) + } + /// Check if the stored hash matches the hash of the string. pub fn matches(&self, src: &str) -> bool { - Self::new(self.kind, src) == *self + Self::new_in_memory(self.kind, src.as_bytes()) == *self } /// The bytes of the hash. @@ -1453,7 +1568,7 @@ impl SourceFileHash { match self.kind { SourceFileHashAlgorithm::Md5 => 16, SourceFileHashAlgorithm::Sha1 => 20, - SourceFileHashAlgorithm::Sha256 => 32, + SourceFileHashAlgorithm::Sha256 | SourceFileHashAlgorithm::Blake3 => 32, } } } @@ -1509,6 +1624,10 @@ pub struct SourceFile { pub src: Option>, /// The source code's hash. pub src_hash: SourceFileHash, + /// Used to enable cargo to use checksums to check if a crate is fresh rather + /// than mtimes. This might be the same as `src_hash`, and if the requested algorithm + /// is identical we won't compute it twice. + pub checksum_hash: Option, /// The external source code (used for external crates, which will have a `None` /// value as `self.src`. pub external_src: FreezeLock, @@ -1536,6 +1655,7 @@ impl Clone for SourceFile { name: self.name.clone(), src: self.src.clone(), src_hash: self.src_hash, + checksum_hash: self.checksum_hash, external_src: self.external_src.clone(), start_pos: self.start_pos, source_len: self.source_len, @@ -1552,6 +1672,7 @@ impl Encodable for SourceFile { fn encode(&self, s: &mut S) { self.name.encode(s); self.src_hash.encode(s); + self.checksum_hash.encode(s); // Do not encode `start_pos` as it's global state for this session. self.source_len.encode(s); @@ -1625,6 +1746,7 @@ impl Decodable for SourceFile { fn decode(d: &mut D) -> SourceFile { let name: FileName = Decodable::decode(d); let src_hash: SourceFileHash = Decodable::decode(d); + let checksum_hash: Option = Decodable::decode(d); let source_len: RelativeBytePos = Decodable::decode(d); let lines = { let num_lines: u32 = Decodable::decode(d); @@ -1650,6 +1772,7 @@ impl Decodable for SourceFile { source_len, src: None, src_hash, + checksum_hash, // Unused - the metadata decoder will construct // a new SourceFile, filling in `external_src` properly external_src: FreezeLock::frozen(ExternalSource::Unneeded), @@ -1733,9 +1856,17 @@ impl SourceFile { name: FileName, mut src: String, hash_kind: SourceFileHashAlgorithm, + checksum_hash_kind: Option, ) -> Result { // Compute the file hash before any normalization. - let src_hash = SourceFileHash::new(hash_kind, &src); + let src_hash = SourceFileHash::new_in_memory(hash_kind, src.as_bytes()); + let checksum_hash = checksum_hash_kind.map(|checksum_hash_kind| { + if checksum_hash_kind == hash_kind { + src_hash + } else { + SourceFileHash::new_in_memory(checksum_hash_kind, src.as_bytes()) + } + }); let normalized_pos = normalize_src(&mut src); let stable_id = StableSourceFileId::from_filename_in_current_crate(&name); @@ -1748,6 +1879,7 @@ impl SourceFile { name, src: Some(Lrc::new(src)), src_hash, + checksum_hash, external_src: FreezeLock::frozen(ExternalSource::Unneeded), start_pos: BytePos::from_u32(0), source_len: RelativeBytePos::from_u32(source_len), diff --git a/compiler/rustc_span/src/source_map.rs b/compiler/rustc_span/src/source_map.rs index 98447147d3e..8a023305937 100644 --- a/compiler/rustc_span/src/source_map.rs +++ b/compiler/rustc_span/src/source_map.rs @@ -175,6 +175,7 @@ pub struct SourceMapInputs { pub file_loader: Box, pub path_mapping: FilePathMapping, pub hash_kind: SourceFileHashAlgorithm, + pub checksum_hash_kind: Option, } pub struct SourceMap { @@ -187,6 +188,12 @@ pub struct SourceMap { /// The algorithm used for hashing the contents of each source file. hash_kind: SourceFileHashAlgorithm, + + /// Similar to `hash_kind`, however this algorithm is used for checksums to determine if a crate is fresh. + /// `cargo` is the primary user of these. + /// + /// If this is equal to `hash_kind` then the checksum won't be computed twice. + checksum_hash_kind: Option, } impl SourceMap { @@ -195,17 +202,19 @@ impl SourceMap { file_loader: Box::new(RealFileLoader), path_mapping, hash_kind: SourceFileHashAlgorithm::Md5, + checksum_hash_kind: None, }) } pub fn with_inputs( - SourceMapInputs { file_loader, path_mapping, hash_kind }: SourceMapInputs, + SourceMapInputs { file_loader, path_mapping, hash_kind, checksum_hash_kind }: SourceMapInputs, ) -> SourceMap { SourceMap { files: Default::default(), file_loader: IntoDynSyncSend(file_loader), path_mapping, hash_kind, + checksum_hash_kind, } } @@ -307,7 +316,8 @@ impl SourceMap { match self.source_file_by_stable_id(stable_id) { Some(lrc_sf) => Ok(lrc_sf), None => { - let source_file = SourceFile::new(filename, src, self.hash_kind)?; + let source_file = + SourceFile::new(filename, src, self.hash_kind, self.checksum_hash_kind)?; // Let's make sure the file_id we generated above actually matches // the ID we generate for the SourceFile we just created. @@ -326,6 +336,7 @@ impl SourceMap { &self, filename: FileName, src_hash: SourceFileHash, + checksum_hash: Option, stable_id: StableSourceFileId, source_len: u32, cnum: CrateNum, @@ -340,6 +351,7 @@ impl SourceMap { name: filename, src: None, src_hash, + checksum_hash, external_src: FreezeLock::new(ExternalSource::Foreign { kind: ExternalSourceKind::AbsentOk, metadata_index, diff --git a/compiler/rustc_span/src/source_map/tests.rs b/compiler/rustc_span/src/source_map/tests.rs index 0c818b94b85..360baec273d 100644 --- a/compiler/rustc_span/src/source_map/tests.rs +++ b/compiler/rustc_span/src/source_map/tests.rs @@ -229,6 +229,7 @@ fn t10() { let SourceFile { name, src_hash, + checksum_hash, source_len, lines, multibyte_chars, @@ -240,6 +241,7 @@ fn t10() { let imported_src_file = sm.new_imported_source_file( name, src_hash, + checksum_hash, stable_id, source_len.to_u32(), CrateNum::ZERO, diff --git a/compiler/rustc_span/src/tests.rs b/compiler/rustc_span/src/tests.rs index 48fa786fb1c..ed1db344634 100644 --- a/compiler/rustc_span/src/tests.rs +++ b/compiler/rustc_span/src/tests.rs @@ -3,9 +3,13 @@ use super::*; #[test] fn test_lookup_line() { let source = "abcdefghijklm\nabcdefghij\n...".to_owned(); - let mut sf = - SourceFile::new(FileName::Anon(Hash64::ZERO), source, SourceFileHashAlgorithm::Sha256) - .unwrap(); + let mut sf = SourceFile::new( + FileName::Anon(Hash64::ZERO), + source, + SourceFileHashAlgorithm::Sha256, + Some(SourceFileHashAlgorithm::Sha256), + ) + .unwrap(); sf.start_pos = BytePos(3); assert_eq!(sf.lines(), &[RelativeBytePos(0), RelativeBytePos(14), RelativeBytePos(25)]); diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs index 49d5b71ff2d..1ffad06457f 100644 --- a/src/tools/tidy/src/deps.rs +++ b/src/tools/tidy/src/deps.rs @@ -88,7 +88,10 @@ pub(crate) const WORKSPACES: &[(&str, ExceptionList, Option<(&[&str], &[&str])>, const EXCEPTIONS: ExceptionList = &[ // tidy-alphabetical-start ("ar_archive_writer", "Apache-2.0 WITH LLVM-exception"), // rustc + ("arrayref", "BSD-2-Clause"), // rustc + ("blake3", "CC0-1.0 OR Apache-2.0 OR Apache-2.0 WITH LLVM-exception"), // rustc ("colored", "MPL-2.0"), // rustfmt + ("constant_time_eq", "CC0-1.0 OR MIT-0 OR Apache-2.0"), // rustc ("dissimilar", "Apache-2.0"), // rustdoc, rustc_lexer (few tests) via expect-test, (dev deps) ("fluent-langneg", "Apache-2.0"), // rustc (fluent translations) ("instant", "BSD-3-Clause"), // rustc_driver/tracing-subscriber/parking_lot @@ -249,14 +252,17 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[ "annotate-snippets", "anstyle", "ar_archive_writer", + "arrayref", "arrayvec", "autocfg", "bitflags", + "blake3", "block-buffer", "byteorder", // via ruzstd in object in thorin-dwp "cc", "cfg-if", "cfg_aliases", + "constant_time_eq", "cpufeatures", "crc32fast", "crossbeam-channel", -- cgit 1.4.1-3-g733a5 From dba814a9221e815a589a3ba48d2ef5287cd951ab Mon Sep 17 00:00:00 2001 From: Jacob Kiesel Date: Sat, 28 Sep 2024 18:09:44 -0600 Subject: Pile all the checksum info into a comment that goes in the same order as the file list for the makefile --- compiler/rustc_interface/src/passes.rs | 33 ++++++++++++++++++++------------- 1 file changed, 20 insertions(+), 13 deletions(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index b9b65755db5..cd5624e38bd 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -536,7 +536,7 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P let write_deps_to_file = |file: &mut dyn Write| -> io::Result<()> { for path in out_filenames { - writeln!( + write!( file, "{}: {}\n", path.display(), @@ -546,6 +546,25 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P .intersperse(" ") .collect::() )?; + + // If caller requested this information, add special comments about source file checksums. + // These are not necessarily the same checksums as was used in the debug files. + if sess.opts.unstable_opts.checksum_hash_algorithm().is_some() { + assert!( + files.iter().all(|(_path, _file_len, hash_algo)| hash_algo.is_some()), + "all files must have a checksum hash computed to output checksum hashes" + ); + write!(file, " # ")?; + files + .iter() + .filter_map(|(_path, file_len, hash_algo)| { + hash_algo.map(|hash_algo| (path, file_len, hash_algo)) + }) + .try_for_each(|(_path, file_len, checksum_hash)| { + write!(file, "checksum:{checksum_hash} file_len:{file_len}, ") + })?; + } + writeln!(file)?; } // Emit a fake target for each input file to the compilation. This @@ -575,18 +594,6 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P } } - // If caller requested this information, add special comments about source file checksums. - // These are not necessarily the same checksums as was used in the debug files. - if sess.opts.unstable_opts.checksum_hash_algorithm().is_some() { - for (path, file_len, checksum_hash) in - files.iter().filter_map(|(path, file_len, hash_algo)| { - hash_algo.map(|hash_algo| (path, file_len, hash_algo)) - }) - { - writeln!(file, "# checksum:{checksum_hash} file_len:{file_len} {path}")?; - } - } - Ok(()) }; -- cgit 1.4.1-3-g733a5 From 6708d56fd2d5f937bc4b137757f18cd7c8dbd06b Mon Sep 17 00:00:00 2001 From: Jacob Kiesel Date: Sat, 28 Sep 2024 23:13:18 -0600 Subject: Fix bug in depinfo output --- compiler/rustc_interface/src/passes.rs | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index cd5624e38bd..5a8ea410a63 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -538,7 +538,7 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P for path in out_filenames { write!( file, - "{}: {}\n", + "{}: {}", path.display(), files .iter() @@ -565,6 +565,7 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P })?; } writeln!(file)?; + writeln!(file)?; } // Emit a fake target for each input file to the compilation. This -- cgit 1.4.1-3-g733a5 From 6fd9ef606f61f3162590ce66e1aa79319b44f2e9 Mon Sep 17 00:00:00 2001 From: Jacob Kiesel Date: Sun, 29 Sep 2024 00:06:40 -0600 Subject: no need to comma delimit this, it's already space delimited --- compiler/rustc_interface/src/passes.rs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index 5a8ea410a63..7429893b51f 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -554,14 +554,14 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P files.iter().all(|(_path, _file_len, hash_algo)| hash_algo.is_some()), "all files must have a checksum hash computed to output checksum hashes" ); - write!(file, " # ")?; + write!(file, " #")?; files .iter() .filter_map(|(_path, file_len, hash_algo)| { hash_algo.map(|hash_algo| (path, file_len, hash_algo)) }) .try_for_each(|(_path, file_len, checksum_hash)| { - write!(file, "checksum:{checksum_hash} file_len:{file_len}, ") + write!(file, " checksum:{checksum_hash} file_len:{file_len}") })?; } writeln!(file)?; -- cgit 1.4.1-3-g733a5 From 15efbc6e8d78b257f594ddfb64d215c9ac3bee6d Mon Sep 17 00:00:00 2001 From: Jacob Kiesel Date: Tue, 1 Oct 2024 21:26:03 -0600 Subject: Write two newlines intentionally --- compiler/rustc_interface/src/passes.rs | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index 7429893b51f..a8afb8c2900 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -564,8 +564,7 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P write!(file, " checksum:{checksum_hash} file_len:{file_len}") })?; } - writeln!(file)?; - writeln!(file)?; + write!(file, "\n\n")?; } // Emit a fake target for each input file to the compilation. This -- cgit 1.4.1-3-g733a5 From b48c5f19e07c46d43d03328c86d3f7af6f9c8187 Mon Sep 17 00:00:00 2001 From: Jacob Kiesel Date: Tue, 1 Oct 2024 23:05:24 -0600 Subject: Restore prior behavior with less duplicate info in dep file --- compiler/rustc_interface/src/passes.rs | 35 +++++++++++----------------- tests/run-make/checksum-freshness/expected.d | 4 +++- 2 files changed, 17 insertions(+), 22 deletions(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index a8afb8c2900..b9b65755db5 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -536,9 +536,9 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P let write_deps_to_file = |file: &mut dyn Write| -> io::Result<()> { for path in out_filenames { - write!( + writeln!( file, - "{}: {}", + "{}: {}\n", path.display(), files .iter() @@ -546,25 +546,6 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P .intersperse(" ") .collect::() )?; - - // If caller requested this information, add special comments about source file checksums. - // These are not necessarily the same checksums as was used in the debug files. - if sess.opts.unstable_opts.checksum_hash_algorithm().is_some() { - assert!( - files.iter().all(|(_path, _file_len, hash_algo)| hash_algo.is_some()), - "all files must have a checksum hash computed to output checksum hashes" - ); - write!(file, " #")?; - files - .iter() - .filter_map(|(_path, file_len, hash_algo)| { - hash_algo.map(|hash_algo| (path, file_len, hash_algo)) - }) - .try_for_each(|(_path, file_len, checksum_hash)| { - write!(file, " checksum:{checksum_hash} file_len:{file_len}") - })?; - } - write!(file, "\n\n")?; } // Emit a fake target for each input file to the compilation. This @@ -594,6 +575,18 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P } } + // If caller requested this information, add special comments about source file checksums. + // These are not necessarily the same checksums as was used in the debug files. + if sess.opts.unstable_opts.checksum_hash_algorithm().is_some() { + for (path, file_len, checksum_hash) in + files.iter().filter_map(|(path, file_len, hash_algo)| { + hash_algo.map(|hash_algo| (path, file_len, hash_algo)) + }) + { + writeln!(file, "# checksum:{checksum_hash} file_len:{file_len} {path}")?; + } + } + Ok(()) }; diff --git a/tests/run-make/checksum-freshness/expected.d b/tests/run-make/checksum-freshness/expected.d index 4b10e293229..51467af53a2 100644 --- a/tests/run-make/checksum-freshness/expected.d +++ b/tests/run-make/checksum-freshness/expected.d @@ -1,4 +1,6 @@ -lib.d: lib.rs foo.rs # checksum:blake3=94af75ee4ed805434484c3de51c9025278e5c3ada2315e2592052e102168a503 file_len:120 checksum:blake3=2720e17bfda4f3b2a5c96bb61b7e76ed8ebe3359b34128c0e5d8032c090a4f1a file_len:119 +lib.d: lib.rs foo.rs lib.rs: foo.rs: +# checksum:blake3=94af75ee4ed805434484c3de51c9025278e5c3ada2315e2592052e102168a503 file_len:120 lib.rs +# checksum:blake3=2720e17bfda4f3b2a5c96bb61b7e76ed8ebe3359b34128c0e5d8032c090a4f1a file_len:119 foo.rs -- cgit 1.4.1-3-g733a5 From 58c5ac43aea5c94d61e3a7a4e8646e714230574d Mon Sep 17 00:00:00 2001 From: Jacob Kiesel Date: Wed, 2 Oct 2024 00:49:46 -0600 Subject: restore prior more readable suggestion --- compiler/rustc_interface/src/passes.rs | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index b9b65755db5..204ae437a3e 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -578,13 +578,14 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P // If caller requested this information, add special comments about source file checksums. // These are not necessarily the same checksums as was used in the debug files. if sess.opts.unstable_opts.checksum_hash_algorithm().is_some() { - for (path, file_len, checksum_hash) in - files.iter().filter_map(|(path, file_len, hash_algo)| { + files + .iter() + .filter_map(|(path, file_len, hash_algo)| { hash_algo.map(|hash_algo| (path, file_len, hash_algo)) }) - { - writeln!(file, "# checksum:{checksum_hash} file_len:{file_len} {path}")?; - } + .try_for_each(|(path, file_len, checksum_hash)| { + writeln!(file, "# checksum:{checksum_hash} file_len:{file_len} {path}") + })?; } Ok(()) -- cgit 1.4.1-3-g733a5 From 2feed6279655d6febce04a0efd167c2aea56facf Mon Sep 17 00:00:00 2001 From: ismailarilik Date: Sat, 5 Oct 2024 10:01:27 +0300 Subject: Handle `rustc_interface` cases of `rustc::potential_query_instability` lint --- compiler/rustc_interface/src/passes.rs | 1 - 1 file changed, 1 deletion(-) (limited to 'compiler/rustc_interface') diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs index 204ae437a3e..fd850d2f39a 100644 --- a/compiler/rustc_interface/src/passes.rs +++ b/compiler/rustc_interface/src/passes.rs @@ -470,7 +470,6 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P }) } - #[allow(rustc::potential_query_instability)] let extra_tracked_files = hash_iter_files( file_depinfo.iter().map(|path_sym| normalize_path(PathBuf::from(path_sym.as_str()))), checksum_hash_algo, -- cgit 1.4.1-3-g733a5