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Auto merge of rust-lang#130807 - tgross35:rollup-p304vzf, r=tgross35
Rollup of 7 pull requests Successful merges: - rust-lang#130234 (improve compile errors for invalid ptr-to-ptr casts with trait objects) - rust-lang#130752 (Improve assembly test for CMSE ABIs) - rust-lang#130764 (Separate collection of crate-local inherent impls from error tracking) - rust-lang#130788 (Pin memchr to 2.5.0 in the library rather than rustc_ast) - rust-lang#130789 (add InProgress ErrorKind gated behind io_error_inprogress feature) - rust-lang#130793 (Mention `COMPILETEST_VERBOSE_CRASHES` on crash test failure) - rust-lang#130798 (rustdoc: inherit parent's stability where applicable) Failed merges: - rust-lang#130735 (Simple validation for unsize coercion in MIR validation) r? `@ghost` `@rustbot` modify labels: rollup
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‎Cargo.lock‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2177,9 +2177,9 @@ dependencies = [
21772177

21782178
[[package]]
21792179
name = "memchr"
2180-
version = "2.5.0"
2180+
version = "2.7.4"
21812181
source = "registry+https://github.com/rust-lang/crates.io-index"
2182-
checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
2182+
checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
21832183

21842184
[[package]]
21852185
name = "memmap2"

‎compiler/rustc_ast/Cargo.toml‎

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -4,10 +4,9 @@ version = "0.0.0"
44
edition = "2021"
55

66
[dependencies]
7-
# FIXME: bumping memchr to 2.7.1 causes linker errors in MSVC thin-lto
87
# tidy-alphabetical-start
98
bitflags = "2.4.1"
10-
memchr = "=2.5.0"
9+
memchr = "2.7.4"
1110
rustc_ast_ir = { path = "../rustc_ast_ir" }
1211
rustc_data_structures = { path = "../rustc_data_structures" }
1312
rustc_index = { path = "../rustc_index" }

‎compiler/rustc_attr/src/builtin.rs‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -153,7 +153,7 @@ pub enum StabilityLevel {
153153
}
154154

155155
/// Rust release in which a feature is stabilized.
156-
#[derive(Encodable, Decodable, PartialEq, Copy, Clone, Debug, Eq, Hash)]
156+
#[derive(Encodable, Decodable, PartialEq, Copy, Clone, Debug, Eq, PartialOrd, Ord, Hash)]
157157
#[derive(HashStable_Generic)]
158158
pub enum StableSince {
159159
Version(RustcVersion),

‎compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs‎

Lines changed: 6 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -333,7 +333,11 @@ impl<'tcx> BorrowExplanation<'tcx> {
333333
}
334334
}
335335

336-
if let ConstraintCategory::Cast { unsize_to: Some(unsize_ty) } = category {
336+
if let ConstraintCategory::Cast {
337+
is_implicit_coercion: true,
338+
unsize_to: Some(unsize_ty),
339+
} = category
340+
{
337341
self.add_object_lifetime_default_note(tcx, err, unsize_ty);
338342
}
339343
self.add_lifetime_bound_suggestion_to_diagnostic(err, &category, span, region_name);
@@ -740,7 +744,7 @@ impl<'tcx> MirBorrowckCtxt<'_, '_, 'tcx> {
740744
// If we see an unsized cast, then if it is our data we should check
741745
// whether it is being cast to a trait object.
742746
Rvalue::Cast(
743-
CastKind::PointerCoercion(PointerCoercion::Unsize),
747+
CastKind::PointerCoercion(PointerCoercion::Unsize, _),
744748
operand,
745749
ty,
746750
) => {

‎compiler/rustc_borrowck/src/diagnostics/region_errors.rs‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -47,7 +47,8 @@ impl<'tcx> ConstraintDescription for ConstraintCategory<'tcx> {
4747
ConstraintCategory::Yield => "yielding this value ",
4848
ConstraintCategory::UseAsConst => "using this value as a constant ",
4949
ConstraintCategory::UseAsStatic => "using this value as a static ",
50-
ConstraintCategory::Cast { .. } => "cast ",
50+
ConstraintCategory::Cast { is_implicit_coercion: false, .. } => "cast ",
51+
ConstraintCategory::Cast { is_implicit_coercion: true, .. } => "coercion ",
5152
ConstraintCategory::CallArgument(_) => "argument ",
5253
ConstraintCategory::TypeAnnotation => "type annotation ",
5354
ConstraintCategory::ClosureBounds => "closure body ",

‎compiler/rustc_borrowck/src/type_check/mod.rs‎

Lines changed: 44 additions & 27 deletions
Original file line numberDiff line numberDiff line change
@@ -1975,8 +1975,9 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
19751975
Rvalue::Cast(cast_kind, op, ty) => {
19761976
self.check_operand(op, location);
19771977

1978-
match cast_kind {
1979-
CastKind::PointerCoercion(PointerCoercion::ReifyFnPointer) => {
1978+
match *cast_kind {
1979+
CastKind::PointerCoercion(PointerCoercion::ReifyFnPointer, coercion_source) => {
1980+
let is_implicit_coercion = coercion_source == CoercionSource::Implicit;
19801981
let src_sig = op.ty(body, tcx).fn_sig(tcx);
19811982

19821983
// HACK: This shouldn't be necessary... We can remove this when we actually
@@ -2007,15 +2008,15 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
20072008
self.prove_predicate(
20082009
ty::ClauseKind::WellFormed(src_ty.into()),
20092010
location.to_locations(),
2010-
ConstraintCategory::Cast { unsize_to: None },
2011+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
20112012
);
20122013

20132014
let src_ty = self.normalize(src_ty, location);
20142015
if let Err(terr) = self.sub_types(
20152016
src_ty,
20162017
*ty,
20172018
location.to_locations(),
2018-
ConstraintCategory::Cast { unsize_to: None },
2019+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
20192020
) {
20202021
span_mirbug!(
20212022
self,
@@ -2036,7 +2037,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
20362037
self.prove_predicate(
20372038
ty::ClauseKind::WellFormed(src_ty.into()),
20382039
location.to_locations(),
2039-
ConstraintCategory::Cast { unsize_to: None },
2040+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
20402041
);
20412042

20422043
// The type that we see in the fcx is like
@@ -2049,7 +2050,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
20492050
src_ty,
20502051
*ty,
20512052
location.to_locations(),
2052-
ConstraintCategory::Cast { unsize_to: None },
2053+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
20532054
) {
20542055
span_mirbug!(
20552056
self,
@@ -2062,19 +2063,23 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
20622063
}
20632064
}
20642065

2065-
CastKind::PointerCoercion(PointerCoercion::ClosureFnPointer(safety)) => {
2066+
CastKind::PointerCoercion(
2067+
PointerCoercion::ClosureFnPointer(safety),
2068+
coercion_source,
2069+
) => {
20662070
let sig = match op.ty(body, tcx).kind() {
20672071
ty::Closure(_, args) => args.as_closure().sig(),
20682072
_ => bug!(),
20692073
};
20702074
let ty_fn_ptr_from =
2071-
Ty::new_fn_ptr(tcx, tcx.signature_unclosure(sig, *safety));
2075+
Ty::new_fn_ptr(tcx, tcx.signature_unclosure(sig, safety));
20722076

2077+
let is_implicit_coercion = coercion_source == CoercionSource::Implicit;
20732078
if let Err(terr) = self.sub_types(
20742079
ty_fn_ptr_from,
20752080
*ty,
20762081
location.to_locations(),
2077-
ConstraintCategory::Cast { unsize_to: None },
2082+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
20782083
) {
20792084
span_mirbug!(
20802085
self,
@@ -2087,7 +2092,10 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
20872092
}
20882093
}
20892094

2090-
CastKind::PointerCoercion(PointerCoercion::UnsafeFnPointer) => {
2095+
CastKind::PointerCoercion(
2096+
PointerCoercion::UnsafeFnPointer,
2097+
coercion_source,
2098+
) => {
20912099
let fn_sig = op.ty(body, tcx).fn_sig(tcx);
20922100

20932101
// The type that we see in the fcx is like
@@ -2099,11 +2107,12 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
20992107

21002108
let ty_fn_ptr_from = tcx.safe_to_unsafe_fn_ty(fn_sig);
21012109

2110+
let is_implicit_coercion = coercion_source == CoercionSource::Implicit;
21022111
if let Err(terr) = self.sub_types(
21032112
ty_fn_ptr_from,
21042113
*ty,
21052114
location.to_locations(),
2106-
ConstraintCategory::Cast { unsize_to: None },
2115+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
21072116
) {
21082117
span_mirbug!(
21092118
self,
@@ -2116,30 +2125,29 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
21162125
}
21172126
}
21182127

2119-
CastKind::PointerCoercion(PointerCoercion::Unsize) => {
2128+
CastKind::PointerCoercion(PointerCoercion::Unsize, coercion_source) => {
21202129
let &ty = ty;
21212130
let trait_ref = ty::TraitRef::new(
21222131
tcx,
21232132
tcx.require_lang_item(LangItem::CoerceUnsized, Some(span)),
21242133
[op.ty(body, tcx), ty],
21252134
);
21262135

2136+
let is_implicit_coercion = coercion_source == CoercionSource::Implicit;
2137+
let unsize_to = tcx.fold_regions(ty, |r, _| {
2138+
if let ty::ReVar(_) = r.kind() { tcx.lifetimes.re_erased } else { r }
2139+
});
21272140
self.prove_trait_ref(
21282141
trait_ref,
21292142
location.to_locations(),
21302143
ConstraintCategory::Cast {
2131-
unsize_to: Some(tcx.fold_regions(ty, |r, _| {
2132-
if let ty::ReVar(_) = r.kind() {
2133-
tcx.lifetimes.re_erased
2134-
} else {
2135-
r
2136-
}
2137-
})),
2144+
is_implicit_coercion,
2145+
unsize_to: Some(unsize_to),
21382146
},
21392147
);
21402148
}
21412149

2142-
CastKind::DynStar => {
2150+
CastKind::PointerCoercion(PointerCoercion::DynStar, coercion_source) => {
21432151
// get the constraints from the target type (`dyn* Clone`)
21442152
//
21452153
// apply them to prove that the source type `Foo` implements `Clone` etc
@@ -2150,12 +2158,13 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
21502158

21512159
let self_ty = op.ty(body, tcx);
21522160

2161+
let is_implicit_coercion = coercion_source == CoercionSource::Implicit;
21532162
self.prove_predicates(
21542163
existential_predicates
21552164
.iter()
21562165
.map(|predicate| predicate.with_self_ty(tcx, self_ty)),
21572166
location.to_locations(),
2158-
ConstraintCategory::Cast { unsize_to: None },
2167+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
21592168
);
21602169

21612170
let outlives_predicate = tcx.mk_predicate(Binder::dummy(
@@ -2166,11 +2175,14 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
21662175
self.prove_predicate(
21672176
outlives_predicate,
21682177
location.to_locations(),
2169-
ConstraintCategory::Cast { unsize_to: None },
2178+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
21702179
);
21712180
}
21722181

2173-
CastKind::PointerCoercion(PointerCoercion::MutToConstPointer) => {
2182+
CastKind::PointerCoercion(
2183+
PointerCoercion::MutToConstPointer,
2184+
coercion_source,
2185+
) => {
21742186
let ty::RawPtr(ty_from, hir::Mutability::Mut) = op.ty(body, tcx).kind()
21752187
else {
21762188
span_mirbug!(self, rvalue, "unexpected base type for cast {:?}", ty,);
@@ -2180,11 +2192,12 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
21802192
span_mirbug!(self, rvalue, "unexpected target type for cast {:?}", ty,);
21812193
return;
21822194
};
2195+
let is_implicit_coercion = coercion_source == CoercionSource::Implicit;
21832196
if let Err(terr) = self.sub_types(
21842197
*ty_from,
21852198
*ty_to,
21862199
location.to_locations(),
2187-
ConstraintCategory::Cast { unsize_to: None },
2200+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
21882201
) {
21892202
span_mirbug!(
21902203
self,
@@ -2197,7 +2210,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
21972210
}
21982211
}
21992212

2200-
CastKind::PointerCoercion(PointerCoercion::ArrayToPointer) => {
2213+
CastKind::PointerCoercion(PointerCoercion::ArrayToPointer, coercion_source) => {
22012214
let ty_from = op.ty(body, tcx);
22022215

22032216
let opt_ty_elem_mut = match ty_from.kind() {
@@ -2242,11 +2255,12 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
22422255
return;
22432256
}
22442257

2258+
let is_implicit_coercion = coercion_source == CoercionSource::Implicit;
22452259
if let Err(terr) = self.sub_types(
22462260
*ty_elem,
22472261
*ty_to,
22482262
location.to_locations(),
2249-
ConstraintCategory::Cast { unsize_to: None },
2263+
ConstraintCategory::Cast { is_implicit_coercion, unsize_to: None },
22502264
) {
22512265
span_mirbug!(
22522266
self,
@@ -2427,7 +2441,10 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
24272441
src_obj,
24282442
dst_obj,
24292443
location.to_locations(),
2430-
ConstraintCategory::Cast { unsize_to: None },
2444+
ConstraintCategory::Cast {
2445+
is_implicit_coercion: false,
2446+
unsize_to: None,
2447+
},
24312448
)
24322449
.unwrap();
24332450
}

‎compiler/rustc_codegen_cranelift/src/base.rs‎

Lines changed: 10 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -652,7 +652,7 @@ fn codegen_stmt<'tcx>(
652652
lval.write_cvalue(fx, res);
653653
}
654654
Rvalue::Cast(
655-
CastKind::PointerCoercion(PointerCoercion::ReifyFnPointer),
655+
CastKind::PointerCoercion(PointerCoercion::ReifyFnPointer, _),
656656
ref operand,
657657
to_ty,
658658
) => {
@@ -677,7 +677,7 @@ fn codegen_stmt<'tcx>(
677677
}
678678
}
679679
Rvalue::Cast(
680-
CastKind::PointerCoercion(PointerCoercion::UnsafeFnPointer),
680+
CastKind::PointerCoercion(PointerCoercion::UnsafeFnPointer, _),
681681
ref operand,
682682
to_ty,
683683
) => {
@@ -688,6 +688,7 @@ fn codegen_stmt<'tcx>(
688688
Rvalue::Cast(
689689
CastKind::PointerCoercion(
690690
PointerCoercion::MutToConstPointer | PointerCoercion::ArrayToPointer,
691+
_,
691692
),
692693
..,
693694
) => {
@@ -741,7 +742,7 @@ fn codegen_stmt<'tcx>(
741742
}
742743
}
743744
Rvalue::Cast(
744-
CastKind::PointerCoercion(PointerCoercion::ClosureFnPointer(_)),
745+
CastKind::PointerCoercion(PointerCoercion::ClosureFnPointer(_), _),
745746
ref operand,
746747
_to_ty,
747748
) => {
@@ -763,14 +764,18 @@ fn codegen_stmt<'tcx>(
763764
}
764765
}
765766
Rvalue::Cast(
766-
CastKind::PointerCoercion(PointerCoercion::Unsize),
767+
CastKind::PointerCoercion(PointerCoercion::Unsize, _),
767768
ref operand,
768769
_to_ty,
769770
) => {
770771
let operand = codegen_operand(fx, operand);
771772
crate::unsize::coerce_unsized_into(fx, operand, lval);
772773
}
773-
Rvalue::Cast(CastKind::DynStar, ref operand, _) => {
774+
Rvalue::Cast(
775+
CastKind::PointerCoercion(PointerCoercion::DynStar, _),
776+
ref operand,
777+
_,
778+
) => {
774779
let operand = codegen_operand(fx, operand);
775780
crate::unsize::coerce_dyn_star(fx, operand, lval);
776781
}

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