Auto merge of rust-lang#122331 - jhpratt:rollup-cbl8xsy, r=jhpratt

Rollup of 9 pull requests

Successful merges:

 - rust-lang#121148 (Add slice::try_range)
 - rust-lang#121633 (Win10: Use `GetSystemTimePreciseAsFileTime` directly)
 - rust-lang#121840 (Expose the Freeze trait again (unstably) and forbid implementing it manually)
 - rust-lang#121907 (skip sanity check for non-host targets in `check` builds)
 - rust-lang#122002 (std::threads: revisit stack address calculation on netbsd.)
 - rust-lang#122108 (Add `target.*.runner` configuration for targets)
 - rust-lang#122298 (RawVec::into_box: avoid unnecessary intermediate reference)
 - rust-lang#122315 (Allow multiple `impl Into<{D,Subd}iagMessage>` parameters in a function.)
 - rust-lang#122326 (Optimize `process_heap_alloc`)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_codegen_cranelift/example/mini_core.rs

@@ -8,6 +8,7 @@
     rustc_attrs,
     transparent_unions,
     auto_traits,
+    freeze_impls,
     thread_local
 )]
 #![no_core]

compiler/rustc_codegen_gcc/example/mini_core.rs

@@ -1,6 +1,6 @@
 #![feature(
     no_core, lang_items, intrinsics, unboxed_closures, type_ascription, extern_types,
-    decl_macro, rustc_attrs, transparent_unions, auto_traits,
+    decl_macro, rustc_attrs, transparent_unions, auto_traits, freeze_impls,
     thread_local
 )]
 #![no_core]

compiler/rustc_feature/src/unstable.rs

@@ -471,6 +471,8 @@ declare_features! (
     (unstable, fn_align, "1.53.0", Some(82232)),
     /// Support delegating implementation of functions to other already implemented functions.
     (incomplete, fn_delegation, "1.76.0", Some(118212)),
+    /// Allows impls for the Freeze trait.
+    (internal, freeze_impls, "CURRENT_RUSTC_VERSION", Some(121675)),
     /// Allows defining gen blocks and `gen fn`.
     (unstable, gen_blocks, "1.75.0", Some(117078)),
     /// Infer generic args for both consts and types.

compiler/rustc_hir_analysis/src/coherence/mod.rs

@@ -10,6 +10,7 @@ use rustc_errors::{codes::*, struct_span_code_err};
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_middle::query::Providers;
 use rustc_middle::ty::{self, TyCtxt, TypeVisitableExt};
+use rustc_session::parse::feature_err;
 use rustc_span::{sym, ErrorGuaranteed};
 use rustc_trait_selection::traits;
 
@@ -49,6 +50,19 @@ fn enforce_trait_manually_implementable(
 ) -> Result<(), ErrorGuaranteed> {
     let impl_header_span = tcx.def_span(impl_def_id);
 
+    if tcx.lang_items().freeze_trait() == Some(trait_def_id) {
+        if !tcx.features().freeze_impls {
+            feature_err(
+                &tcx.sess,
+                sym::freeze_impls,
+                impl_header_span,
+                "explicit impls for the `Freeze` trait are not permitted",
+            )
+            .with_span_label(impl_header_span, format!("impl of `Freeze` not allowed"))
+            .emit();
+        }
+    }
+
     // Disallow *all* explicit impls of traits marked `#[rustc_deny_explicit_impl]`
     if trait_def.deny_explicit_impl {
         let trait_name = tcx.item_name(trait_def_id);

compiler/rustc_lint/src/internal.rs

@@ -409,9 +409,8 @@ impl LateLintPass<'_> for Diagnostics {
             }
         };
 
-        // Does the callee have a `impl Into<{D,Subd}iagMessage>` parameter? (There should be at
-        // most one.)
-        let mut impl_into_diagnostic_message_param = None;
+        // Does the callee have one or more `impl Into<{D,Subd}iagMessage>` parameters?
+        let mut impl_into_diagnostic_message_params = vec![];
         let fn_sig = cx.tcx.fn_sig(def_id).instantiate_identity().skip_binder();
         let predicates = cx.tcx.predicates_of(def_id).instantiate_identity(cx.tcx).predicates;
         for (i, &param_ty) in fn_sig.inputs().iter().enumerate() {
@@ -425,20 +424,14 @@ impl LateLintPass<'_> for Diagnostics {
                         && let ty1 = trait_ref.args.type_at(1)
                         && is_diag_message(ty1)
                     {
-                        if impl_into_diagnostic_message_param.is_some() {
-                            cx.tcx.dcx().span_bug(
-                                span,
-                                "can't handle multiple `impl Into<{D,Sub}iagMessage>` params",
-                            );
-                        }
-                        impl_into_diagnostic_message_param = Some((i, p.name));
+                        impl_into_diagnostic_message_params.push((i, p.name));
                     }
                 }
             }
         }
 
         // Is the callee interesting?
-        if !has_attr && impl_into_diagnostic_message_param.is_none() {
+        if !has_attr && impl_into_diagnostic_message_params.is_empty() {
             return;
         }
 
@@ -481,7 +474,7 @@ impl LateLintPass<'_> for Diagnostics {
         // Calls to methods with an `impl Into<{D,Subd}iagMessage>` parameter must be passed an arg
         // with type `{D,Subd}iagMessage` or `impl Into<{D,Subd}iagMessage>`. Otherwise, emit an
         // `UNTRANSLATABLE_DIAGNOSTIC` lint.
-        if let Some((param_i, param_i_p_name)) = impl_into_diagnostic_message_param {
+        for (param_i, param_i_p_name) in impl_into_diagnostic_message_params {
             // Is the arg type `{Sub,D}iagMessage`or `impl Into<{Sub,D}iagMessage>`?
             let arg_ty = call_tys[param_i];
             let is_translatable = is_diag_message(arg_ty)

compiler/rustc_span/src/symbol.rs

@@ -864,6 +864,7 @@ symbols! {
         format_placeholder,
         format_unsafe_arg,
         freeze,
+        freeze_impls,
         freg,
         frem_algebraic,
         frem_fast,

config.example.toml

@@ -842,6 +842,17 @@
 # See that option for more info.
 #codegen-backends = rust.codegen-backends (array)
 
+# This is a "runner" to pass to `compiletest` when executing tests. Tests will
+# execute this tool where the binary-to-test is passed as an argument. Can
+# be useful for situations such as when WebAssembly is being tested and a
+# runtime needs to be configured. This value is similar to
+# Cargo's `CARGO_$target_RUNNER` configuration.
+#
+# This configuration is a space-separated list of arguments so `foo bar` would
+# execute the program `foo` with the first argument as `bar` and the second
+# argument as the test binary.
+#runner = <none> (string)
+
 # =============================================================================
 # Distribution options
 #

library/alloc/src/raw_vec.rs

@@ -5,7 +5,6 @@ use core::cmp;
 use core::hint;
 use core::mem::{self, ManuallyDrop, MaybeUninit, SizedTypeProperties};
 use core::ptr::{self, NonNull, Unique};
-use core::slice;
 
 #[cfg(not(no_global_oom_handling))]
 use crate::alloc::handle_alloc_error;
@@ -192,7 +191,7 @@ impl<T, A: Allocator> RawVec<T, A> {
 
         let me = ManuallyDrop::new(self);
         unsafe {
-            let slice = slice::from_raw_parts_mut(me.ptr() as *mut MaybeUninit<T>, len);
+            let slice = ptr::slice_from_raw_parts_mut(me.ptr() as *mut MaybeUninit<T>, len);
             Box::from_raw_in(slice, ptr::read(&me.alloc))
         }
     }

library/alloc/src/slice.rs

@@ -33,8 +33,6 @@ use crate::vec::Vec;
 #[cfg(test)]
 mod tests;
 
-#[unstable(feature = "slice_range", issue = "76393")]
-pub use core::slice::range;
 #[unstable(feature = "array_chunks", issue = "74985")]
 pub use core::slice::ArrayChunks;
 #[unstable(feature = "array_chunks", issue = "74985")]
@@ -51,6 +49,8 @@ pub use core::slice::{from_mut, from_ref};
 pub use core::slice::{from_mut_ptr_range, from_ptr_range};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::slice::{from_raw_parts, from_raw_parts_mut};
+#[unstable(feature = "slice_range", issue = "76393")]
+pub use core::slice::{range, try_range};
 #[stable(feature = "slice_group_by", since = "1.77.0")]
 pub use core::slice::{ChunkBy, ChunkByMut};
 #[stable(feature = "rust1", since = "1.0.0")]

library/core/src/lib.rs

@@ -204,6 +204,7 @@
 // tidy-alphabetical-start
 #![cfg_attr(bootstrap, feature(diagnostic_namespace))]
 #![cfg_attr(bootstrap, feature(platform_intrinsics))]
+#![cfg_attr(not(bootstrap), feature(freeze_impls))]
 #![feature(abi_unadjusted)]
 #![feature(adt_const_params)]
 #![feature(allow_internal_unsafe)]