Rollup of 12 pull requests

Cargo.lock

@@ -310,13 +310,12 @@ dependencies = [
 
 [[package]]
 name = "bstr"
-version = "1.5.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a246e68bb43f6cd9db24bea052a53e40405417c5fb372e3d1a8a7f770a564ef5"
+checksum = "c48f0051a4b4c5e0b6d365cd04af53aeaa209e3cc15ec2cdb69e73cc87fbd0dc"
 dependencies = [
  "memchr",
- "once_cell",
- "regex-automata 0.1.10",
+ "regex-automata 0.4.3",
  "serde",
 ]
 
@@ -1589,11 +1588,11 @@ checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
 
 [[package]]
 name = "globset"
-version = "0.4.10"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "029d74589adefde59de1a0c4f4732695c32805624aec7b68d91503d4dba79afc"
+checksum = "759c97c1e17c55525b57192c06a267cda0ac5210b222d6b82189a2338fa1c13d"
 dependencies = [
- "aho-corasick 0.7.20",
+ "aho-corasick 1.0.2",
  "bstr",
  "fnv",
  "log",
@@ -2370,9 +2369,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.5.0"
+version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 dependencies = [
  "compiler_builtins",
  "rustc-std-workspace-core",
@@ -3183,6 +3182,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "regex-automata"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
+
 [[package]]
 name = "regex-syntax"
 version = "0.6.29"
@@ -5424,7 +5429,7 @@ name = "tidy"
 version = "0.1.0"
 dependencies = [
  "cargo-platform",
- "cargo_metadata 0.15.4",
+ "cargo_metadata 0.18.0",
  "ignore",
  "lazy_static",
  "miropt-test-tools",

compiler/rustc_codegen_ssa/messages.ftl

@@ -325,7 +325,7 @@ codegen_ssa_unsupported_arch = unsupported arch `{$arch}` for os `{$os}`
 
 codegen_ssa_unsupported_link_self_contained = option `-C link-self-contained` is not supported on this target
 
-codegen_ssa_use_cargo_directive = use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)
+codegen_ssa_use_cargo_directive = use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#rustc-link-lib)
 
 codegen_ssa_version_script_write_failure = failed to write version script: {$error}
 

compiler/rustc_lexer/src/lib.rs

@@ -20,8 +20,9 @@
 //! [`rustc_parse::lexer`]: ../rustc_parse/lexer/index.html
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
-// We want to be able to build this crate with a stable compiler, so no
-// `#![feature]` attributes should be added.
+// We want to be able to build this crate with a stable compiler,
+// so no `#![feature]` attributes should be added.
+#![deny(unstable_features)]
 
 mod cursor;
 pub mod unescape;

compiler/rustc_lint/messages.ftl

@@ -148,7 +148,7 @@ lint_builtin_unsafe_impl = implementation of an `unsafe` trait
 
 lint_builtin_unsafe_trait = declaration of an `unsafe` trait
 
-lint_builtin_unstable_features = unstable feature
+lint_builtin_unstable_features = use of an unstable feature
 
 lint_builtin_unused_doc_comment = unused doc comment
     .label = rustdoc does not generate documentation for {$kind}

compiler/rustc_lint/src/builtin.rs

@@ -1233,10 +1233,30 @@ impl<'tcx> LateLintPass<'tcx> for MutableTransmutes {
 }
 
 declare_lint! {
-    /// The `unstable_features` is deprecated and should no longer be used.
+    /// The `unstable_features` lint detects uses of `#![feature]`.
+    ///
+    /// ### Example
+    ///
+    /// ```rust,compile_fail
+    /// #![deny(unstable_features)]
+    /// #![feature(test)]
+    /// ```
+    ///
+    /// {{produces}}
+    ///
+    /// ### Explanation
+    ///
+    /// In larger nightly-based projects which
+    ///
+    /// * consist of a multitude of crates where a subset of crates has to compile on
+    ///   stable either unconditionally or depending on a `cfg` flag to for example
+    ///   allow stable users to depend on them,
+    /// * don't use nightly for experimental features but for, e.g., unstable options only,
+    ///
+    /// this lint may come in handy to enforce policies of these kinds.
     UNSTABLE_FEATURES,
     Allow,
-    "enabling unstable features (deprecated. do not use)"
+    "enabling unstable features"
 }
 
 declare_lint_pass!(
@@ -1246,11 +1266,11 @@ declare_lint_pass!(
 
 impl<'tcx> LateLintPass<'tcx> for UnstableFeatures {
     fn check_attribute(&mut self, cx: &LateContext<'_>, attr: &ast::Attribute) {
-        if attr.has_name(sym::feature) {
-            if let Some(items) = attr.meta_item_list() {
-                for item in items {
-                    cx.emit_spanned_lint(UNSTABLE_FEATURES, item.span(), BuiltinUnstableFeatures);
-                }
+        if attr.has_name(sym::feature)
+            && let Some(items) = attr.meta_item_list()
+        {
+            for item in items {
+                cx.emit_spanned_lint(UNSTABLE_FEATURES, item.span(), BuiltinUnstableFeatures);
             }
         }
     }

compiler/rustc_lint_defs/src/builtin.rs

@@ -2755,6 +2755,11 @@ declare_lint! {
     pub UNSAFE_OP_IN_UNSAFE_FN,
     Allow,
     "unsafe operations in unsafe functions without an explicit unsafe block are deprecated",
+    @future_incompatible = FutureIncompatibleInfo {
+        reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2024),
+        reference: "issue #71668 <https://github.com/rust-lang/rust/issues/71668>",
+        explain_reason: false
+    };
     @edition Edition2024 => Warn;
 }
 

compiler/rustc_mir_build/src/errors.rs

@@ -430,7 +430,7 @@ impl AddToDiagnostic for UnsafeNotInheritedLintNote {
         diag.tool_only_multipart_suggestion(
             fluent::mir_build_wrap_suggestion,
             vec![(body_start, "{ unsafe ".into()), (body_end, "}".into())],
-            Applicability::MaybeIncorrect,
+            Applicability::MachineApplicable,
         );
     }
 }

compiler/rustc_mir_transform/src/coverage/mod.rs

@@ -351,7 +351,18 @@ fn is_eligible_for_coverage(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
         return false;
     }
 
+    // Don't instrument functions with `#[automatically_derived]` on their
+    // enclosing impl block, on the assumption that most users won't care about
+    // coverage for derived impls.
+    if let Some(impl_of) = tcx.impl_of_method(def_id.to_def_id())
+        && tcx.is_automatically_derived(impl_of)
+    {
+        trace!("InstrumentCoverage skipped for {def_id:?} (automatically derived)");
+        return false;
+    }
+
     if tcx.codegen_fn_attrs(def_id).flags.contains(CodegenFnAttrFlags::NO_COVERAGE) {
+        trace!("InstrumentCoverage skipped for {def_id:?} (`#[coverage(off)]`)");
         return false;
     }
 

compiler/rustc_parse_format/src/lib.rs

@@ -11,8 +11,9 @@
 )]
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
-// WARNING: We want to be able to build this crate with a stable compiler,
-//          so no `#![feature]` attributes should be added!
+// We want to be able to build this crate with a stable compiler,
+// so no `#![feature]` attributes should be added.
+#![deny(unstable_features)]
 
 use rustc_lexer::unescape;
 pub use Alignment::*;

library/alloc/src/rc.rs

@@ -1924,7 +1924,7 @@ impl<T: ?Sized, A: Allocator> Rc<T, A> {
 
             // Free the allocation without dropping its contents
             let (bptr, alloc) = Box::into_raw_with_allocator(src);
-            let src = Box::from_raw(bptr as *mut mem::ManuallyDrop<T>);
+            let src = Box::from_raw_in(bptr as *mut mem::ManuallyDrop<T>, alloc.by_ref());
             drop(src);
 
             Self::from_ptr_in(ptr, alloc)

library/alloc/src/sync.rs

@@ -1869,7 +1869,7 @@ impl<T: ?Sized, A: Allocator> Arc<T, A> {
 
             // Free the allocation without dropping its contents
             let (bptr, alloc) = Box::into_raw_with_allocator(src);
-            let src = Box::from_raw(bptr as *mut mem::ManuallyDrop<T>);
+            let src = Box::from_raw_in(bptr as *mut mem::ManuallyDrop<T>, alloc.by_ref());
             drop(src);
 
             Self::from_ptr_in(ptr, alloc)

library/core/src/cmp.rs

@@ -710,7 +710,8 @@ impl<T: Clone> Clone for Reverse<T> {
 /// [lexicographic](https://en.wikipedia.org/wiki/Lexicographic_order) ordering
 /// based on the top-to-bottom declaration order of the struct's members.
 ///
-/// When `derive`d on enums, variants are ordered by their discriminants.
+/// When `derive`d on enums, variants are ordered primarily by their discriminants.
+/// Secondarily, they are ordered by their fields.
 /// By default, the discriminant is smallest for variants at the top, and
 /// largest for variants at the bottom. Here's an example:
 ///
@@ -963,7 +964,8 @@ pub macro Ord($item:item) {
 /// [lexicographic](https://en.wikipedia.org/wiki/Lexicographic_order) ordering
 /// based on the top-to-bottom declaration order of the struct's members.
 ///
-/// When `derive`d on enums, variants are ordered by their discriminants.
+/// When `derive`d on enums, variants are primarily ordered by their discriminants.
+/// Secondarily, they are ordered by their fields.
 /// By default, the discriminant is smallest for variants at the top, and
 /// largest for variants at the bottom. Here's an example:
 ///

library/core/src/num/nonzero.rs

@@ -1,6 +1,9 @@
 //! Definitions of integer that is known not to equal zero.
 
+use crate::cmp::Ordering;
 use crate::fmt;
+use crate::hash::{Hash, Hasher};
+use crate::marker::StructuralPartialEq;
 use crate::ops::{BitOr, BitOrAssign, Div, Neg, Rem};
 use crate::str::FromStr;
 
@@ -31,13 +34,6 @@ pub trait ZeroablePrimitive: Sized + Copy + private::Sealed {
     type NonZero;
 }
 
-#[unstable(
-    feature = "nonzero_internals",
-    reason = "implementation detail which may disappear or be replaced at any time",
-    issue = "none"
-)]
-pub(crate) type NonZero<T> = <T as ZeroablePrimitive>::NonZero;
-
 macro_rules! impl_zeroable_primitive {
     ($NonZero:ident ( $primitive:ty )) => {
         #[unstable(
@@ -71,6 +67,13 @@ impl_zeroable_primitive!(NonZeroI64(i64));
 impl_zeroable_primitive!(NonZeroI128(i128));
 impl_zeroable_primitive!(NonZeroIsize(isize));
 
+#[unstable(
+    feature = "nonzero_internals",
+    reason = "implementation detail which may disappear or be replaced at any time",
+    issue = "none"
+)]
+pub(crate) type NonZero<T> = <T as ZeroablePrimitive>::NonZero;
+
 macro_rules! impl_nonzero_fmt {
     ( #[$stability: meta] ( $( $Trait: ident ),+ ) for $Ty: ident ) => {
         $(
@@ -128,7 +131,7 @@ macro_rules! nonzero_integer {
         ///
         /// [null pointer optimization]: crate::option#representation
         #[$stability]
-        #[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+        #[derive(Copy, Eq)]
         #[repr(transparent)]
         #[rustc_layout_scalar_valid_range_start(1)]
         #[rustc_nonnull_optimization_guaranteed]
@@ -494,6 +497,96 @@ macro_rules! nonzero_integer {
             }
         }
 
+        #[$stability]
+        impl Clone for $Ty {
+            #[inline]
+            fn clone(&self) -> Self {
+                // SAFETY: The contained value is non-zero.
+                unsafe { Self(self.0) }
+            }
+        }
+
+        #[$stability]
+        impl PartialEq for $Ty {
+            #[inline]
+            fn eq(&self, other: &Self) -> bool {
+                self.0 == other.0
+            }
+
+            #[inline]
+            fn ne(&self, other: &Self) -> bool {
+                self.0 != other.0
+            }
+        }
+
+        #[unstable(feature = "structural_match", issue = "31434")]
+        impl StructuralPartialEq for $Ty {}
+
+        #[$stability]
+        impl PartialOrd for $Ty {
+            #[inline]
+            fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+                self.0.partial_cmp(&other.0)
+            }
+
+            #[inline]
+            fn lt(&self, other: &Self) -> bool {
+                self.0 < other.0
+            }
+
+            #[inline]
+            fn le(&self, other: &Self) -> bool {
+                self.0 <= other.0
+            }
+
+            #[inline]
+            fn gt(&self, other: &Self) -> bool {
+                self.0 > other.0
+            }
+
+            #[inline]
+            fn ge(&self, other: &Self) -> bool {
+                self.0 >= other.0
+            }
+        }
+
+        #[$stability]
+        impl Ord for $Ty {
+            #[inline]
+            fn cmp(&self, other: &Self) -> Ordering {
+                self.0.cmp(&other.0)
+            }
+
+            #[inline]
+            fn max(self, other: Self) -> Self {
+                // SAFETY: The maximum of two non-zero values is still non-zero.
+                unsafe { Self(self.0.max(other.0)) }
+            }
+
+            #[inline]
+            fn min(self, other: Self) -> Self {
+                // SAFETY: The minimum of two non-zero values is still non-zero.
+                unsafe { Self(self.0.min(other.0)) }
+            }
+
+            #[inline]
+            fn clamp(self, min: Self, max: Self) -> Self {
+                // SAFETY: A non-zero value clamped between two non-zero values is still non-zero.
+                unsafe { Self(self.0.clamp(min.0, max.0)) }
+            }
+        }
+
+        #[$stability]
+        impl Hash for $Ty {
+            #[inline]
+            fn hash<H>(&self, state: &mut H)
+            where
+                H: Hasher,
+            {
+                self.0.hash(state)
+            }
+        }
+
         #[stable(feature = "from_nonzero", since = "1.31.0")]
         impl From<$Ty> for $Int {
             #[doc = concat!("Converts a `", stringify!($Ty), "` into an `", stringify!($Int), "`")]

library/core/src/option.rs

@@ -642,7 +642,7 @@ impl<T> Option<T> {
     /// assert_eq!(x.is_none(), true);
     /// ```
     #[must_use = "if you intended to assert that this doesn't have a value, consider \
-                  `.and_then(|_| panic!(\"`Option` had a value when expected `None`\"))` instead"]
+                  wrapping this in an `assert!()` instead"]
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_stable(feature = "const_option_basics", since = "1.48.0")]