Merge from rustc

26 files changed, 76 insertions, 130 deletions

diff --git a/library/alloc/src/alloc.rs b/library/alloc/src/alloc.rs
index 01d1fdc9b2a..8c4f6a73d7f 100644
--- a/library/alloc/src/alloc.rs
+++ b/library/alloc/src/alloc.rs
@@ -38,7 +38,6 @@ extern "Rust" {
     #[rustc_nounwind]
     fn __rust_alloc_zeroed(size: usize, align: usize) -> *mut u8;
 
-    #[cfg(not(bootstrap))]
     static __rust_no_alloc_shim_is_unstable: u8;
 }
 
@@ -96,7 +95,6 @@ pub unsafe fn alloc(layout: Layout) -> *mut u8 {
     unsafe {
         // Make sure we don't accidentally allow omitting the allocator shim in
         // stable code until it is actually stabilized.
-        #[cfg(not(bootstrap))]
         core::ptr::read_volatile(&__rust_no_alloc_shim_is_unstable);
 
         __rust_alloc(layout.size(), layout.align())
diff --git a/library/alloc/src/string.rs b/library/alloc/src/string.rs
index c524d4c0367..59e3f887b52 100644
--- a/library/alloc/src/string.rs
+++ b/library/alloc/src/string.rs
@@ -2624,7 +2624,7 @@ impl ToString for String {
 }
 
 #[cfg(not(no_global_oom_handling))]
-#[stable(feature = "fmt_arguments_to_string_specialization", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "fmt_arguments_to_string_specialization", since = "1.71.0")]
 impl ToString for fmt::Arguments<'_> {
     #[inline]
     fn to_string(&self) -> String {
diff --git a/library/core/src/convert/mod.rs b/library/core/src/convert/mod.rs
index 38a6d1ccdb5..799085e9a83 100644
--- a/library/core/src/convert/mod.rs
+++ b/library/core/src/convert/mod.rs
@@ -495,8 +495,7 @@ pub trait Into<T>: Sized {
 /// By converting underlying error types to our own custom error type that encapsulates the
 /// underlying error type, we can return a single error type without losing information on the
 /// underlying cause. The '?' operator automatically converts the underlying error type to our
-/// custom error type by calling `Into<CliError>::into` which is automatically provided when
-/// implementing `From`. The compiler then infers which implementation of `Into` should be used.
+/// custom error type with `From::from`.
 ///
 /// ```
 /// use std::fs;
diff --git a/library/core/src/ffi/c_str.rs b/library/core/src/ffi/c_str.rs
index 201bacb28c7..50c7516b7fe 100644
--- a/library/core/src/ffi/c_str.rs
+++ b/library/core/src/ffi/c_str.rs
@@ -81,7 +81,7 @@ use crate::str;
 #[derive(Hash)]
 #[stable(feature = "core_c_str", since = "1.64.0")]
 #[rustc_has_incoherent_inherent_impls]
-#[cfg_attr(not(bootstrap), lang = "CStr")]
+#[lang = "CStr"]
 // FIXME:
 // `fn from` in `impl From<&CStr> for Box<CStr>` current implementation relies
 // on `CStr` being layout-compatible with `[u8]`.
@@ -531,8 +531,8 @@ impl CStr {
     /// # }
     /// ```
     #[inline]
-    #[stable(feature = "cstr_is_empty", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "cstr_is_empty", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "cstr_is_empty", since = "1.71.0")]
+    #[rustc_const_stable(feature = "cstr_is_empty", since = "1.71.0")]
     pub const fn is_empty(&self) -> bool {
         // SAFETY: We know there is at least one byte; for empty strings it
         // is the NUL terminator.
diff --git a/library/core/src/ffi/mod.rs b/library/core/src/ffi/mod.rs
index b73abbbaca7..86ea154a886 100644
--- a/library/core/src/ffi/mod.rs
+++ b/library/core/src/ffi/mod.rs
@@ -202,7 +202,7 @@ mod c_long_definition {
 //     would be uninhabited and at least dereferencing such pointers would
 //     be UB.
 #[doc = include_str!("c_void.md")]
-#[cfg_attr(not(bootstrap), lang = "c_void")]
+#[lang = "c_void"]
 #[cfg_attr(not(doc), repr(u8))] // work around https://github.com/rust-lang/rust/issues/90435
 #[stable(feature = "core_c_void", since = "1.30.0")]
 pub enum c_void {
diff --git a/library/core/src/hash/mod.rs b/library/core/src/hash/mod.rs
index ca7c0772de8..794a57f0922 100644
--- a/library/core/src/hash/mod.rs
+++ b/library/core/src/hash/mod.rs
@@ -695,7 +695,7 @@ pub trait BuildHasher {
     ///     bh.hash_one(&OrderAmbivalentPair(2, 10))
     /// );
     /// ```
-    #[stable(feature = "build_hasher_simple_hash_one", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "build_hasher_simple_hash_one", since = "1.71.0")]
     fn hash_one<T: Hash>(&self, x: T) -> u64
     where
         Self: Sized,
diff --git a/library/core/src/intrinsics.rs b/library/core/src/intrinsics.rs
index 23ded42fa66..6dca1fe1e69 100644
--- a/library/core/src/intrinsics.rs
+++ b/library/core/src/intrinsics.rs
@@ -1385,7 +1385,6 @@ extern "rust-intrinsic" {
     ///
     /// This is not expected to ever be exposed directly to users, rather it
     /// may eventually be exposed through some more-constrained API.
-    #[cfg(not(bootstrap))]
     #[rustc_const_stable(feature = "const_transmute", since = "1.56.0")]
     #[rustc_nounwind]
     pub fn transmute_unchecked<Src, Dst>(src: Src) -> Dst;
@@ -1425,19 +1424,11 @@ extern "rust-intrinsic" {
     /// returned value will result in undefined behavior.
     ///
     /// The stabilized version of this intrinsic is [`pointer::offset`].
-    #[cfg(not(bootstrap))]
     #[must_use = "returns a new pointer rather than modifying its argument"]
     #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
     #[rustc_nounwind]
     pub fn offset<Ptr, Delta>(dst: Ptr, offset: Delta) -> Ptr;
 
-    /// The bootstrap version of this is more restricted.
-    #[cfg(bootstrap)]
-    #[must_use = "returns a new pointer rather than modifying its argument"]
-    #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
-    #[rustc_nounwind]
-    pub fn offset<T>(dst: *const T, offset: isize) -> *const T;
-
     /// Calculates the offset from a pointer, potentially wrapping.
     ///
     /// This is implemented as an intrinsic to avoid converting to and from an
@@ -2260,7 +2251,7 @@ extern "rust-intrinsic" {
     /// This intrinsic can *only* be called where the pointer is a local without
     /// projections (`read_via_copy(ptr)`, not `read_via_copy(*ptr)`) so that it
     /// trivially obeys runtime-MIR rules about derefs in operands.
-    #[rustc_const_stable(feature = "const_ptr_read", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_ptr_read", since = "1.71.0")]
     #[rustc_nounwind]
     pub fn read_via_copy<T>(ptr: *const T) -> T;
 
@@ -2270,7 +2261,6 @@ extern "rust-intrinsic" {
     /// This intrinsic can *only* be called where the pointer is a local without
     /// projections (`write_via_move(ptr, x)`, not `write_via_move(*ptr, x)`) so
     /// that it trivially obeys runtime-MIR rules about derefs in operands.
-    #[cfg(not(bootstrap))]
     #[rustc_const_unstable(feature = "const_ptr_write", issue = "86302")]
     #[rustc_nounwind]
     pub fn write_via_move<T>(ptr: *mut T, value: T);
@@ -2832,24 +2822,3 @@ pub const unsafe fn write_bytes<T>(dst: *mut T, val: u8, count: usize) {
         write_bytes(dst, val, count)
     }
 }
-
-/// Polyfill for bootstrap
-#[cfg(bootstrap)]
-pub const unsafe fn transmute_unchecked<Src, Dst>(src: Src) -> Dst {
-    use crate::mem::*;
-    // SAFETY: It's a transmute -- the caller promised it's fine.
-    unsafe { transmute_copy(&ManuallyDrop::new(src)) }
-}
-
-/// Polyfill for bootstrap
-#[cfg(bootstrap)]
-pub const unsafe fn write_via_move<T>(ptr: *mut T, value: T) {
-    use crate::mem::*;
-    // SAFETY: the caller must guarantee that `dst` is valid for writes.
-    // `dst` cannot overlap `src` because the caller has mutable access
-    // to `dst` while `src` is owned by this function.
-    unsafe {
-        copy_nonoverlapping::<T>(&value, ptr, 1);
-        forget(value);
-    }
-}
diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs
index 8dab8d1a692..2d2d5d49175 100644
--- a/library/core/src/marker.rs
+++ b/library/core/src/marker.rs
@@ -971,7 +971,7 @@ pub trait Tuple {}
 pub trait PointerLike {}
 
 /// A marker for types which can be used as types of `const` generic parameters.
-#[cfg_attr(not(bootstrap), lang = "const_param_ty")]
+#[lang = "const_param_ty"]
 #[unstable(feature = "adt_const_params", issue = "95174")]
 #[rustc_on_unimplemented(message = "`{Self}` can't be used as a const parameter type")]
 pub trait ConstParamTy: StructuralEq {}
@@ -979,7 +979,6 @@ pub trait ConstParamTy: StructuralEq {}
 /// Derive macro generating an impl of the trait `ConstParamTy`.
 #[rustc_builtin_macro]
 #[unstable(feature = "adt_const_params", issue = "95174")]
-#[cfg(not(bootstrap))]
 pub macro ConstParamTy($item:item) {
     /* compiler built-in */
 }
diff --git a/library/core/src/mem/mod.rs b/library/core/src/mem/mod.rs
index afbfd6d362d..39c9a04eea9 100644
--- a/library/core/src/mem/mod.rs
+++ b/library/core/src/mem/mod.rs
@@ -968,7 +968,7 @@ pub const fn replace<T>(dest: &mut T, src: T) -> T {
 /// Integers and other types implementing [`Copy`] are unaffected by `drop`.
 ///
 /// ```
-/// # #![cfg_attr(not(bootstrap), allow(dropping_copy_types))]
+/// # #![allow(dropping_copy_types)]
 /// #[derive(Copy, Clone)]
 /// struct Foo(u8);
 ///
@@ -1316,7 +1316,6 @@ impl<T> SizedTypeProperties for T {}
 ///
 /// assert_eq!(mem::offset_of!(NestedA, b.0), 0);
 /// ```
-#[cfg(not(bootstrap))]
 #[unstable(feature = "offset_of", issue = "106655")]
 #[allow_internal_unstable(builtin_syntax)]
 pub macro offset_of($Container:ty, $($fields:tt).+ $(,)?) {
diff --git a/library/core/src/num/nonzero.rs b/library/core/src/num/nonzero.rs
index 38a1c42d9e8..7f06e170ad0 100644
--- a/library/core/src/num/nonzero.rs
+++ b/library/core/src/num/nonzero.rs
@@ -769,8 +769,8 @@ macro_rules! nonzero_signed_operations {
                 /// ```
                 #[must_use]
                 #[inline]
-                #[stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
-                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
+                #[stable(feature = "nonzero_negation_ops", since = "1.71.0")]
+                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "1.71.0")]
                 pub const fn is_positive(self) -> bool {
                     self.get().is_positive()
                 }
@@ -794,8 +794,8 @@ macro_rules! nonzero_signed_operations {
                 /// ```
                 #[must_use]
                 #[inline]
-                #[stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
-                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
+                #[stable(feature = "nonzero_negation_ops", since = "1.71.0")]
+                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "1.71.0")]
                 pub const fn is_negative(self) -> bool {
                     self.get().is_negative()
                 }
@@ -819,8 +819,8 @@ macro_rules! nonzero_signed_operations {
                 /// # }
                 /// ```
                 #[inline]
-                #[stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
-                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
+                #[stable(feature = "nonzero_negation_ops", since = "1.71.0")]
+                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "1.71.0")]
                 pub const fn checked_neg(self) -> Option<$Ty> {
                     if let Some(result) = self.get().checked_neg() {
                         // SAFETY: negation of nonzero cannot yield zero values.
@@ -851,8 +851,8 @@ macro_rules! nonzero_signed_operations {
                 /// # }
                 /// ```
                 #[inline]
-                #[stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
-                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
+                #[stable(feature = "nonzero_negation_ops", since = "1.71.0")]
+                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "1.71.0")]
                 pub const fn overflowing_neg(self) -> ($Ty, bool) {
                     let (result, overflow) = self.get().overflowing_neg();
                     // SAFETY: negation of nonzero cannot yield zero values.
@@ -884,8 +884,8 @@ macro_rules! nonzero_signed_operations {
                 /// # }
                 /// ```
                 #[inline]
-                #[stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
-                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
+                #[stable(feature = "nonzero_negation_ops", since = "1.71.0")]
+                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "1.71.0")]
                 pub const fn saturating_neg(self) -> $Ty {
                     if let Some(result) = self.checked_neg() {
                         return result;
@@ -916,8 +916,8 @@ macro_rules! nonzero_signed_operations {
                 /// # }
                 /// ```
                 #[inline]
-                #[stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
-                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "CURRENT_RUSTC_VERSION")]
+                #[stable(feature = "nonzero_negation_ops", since = "1.71.0")]
+                #[rustc_const_stable(feature = "nonzero_negation_ops", since = "1.71.0")]
                 pub const fn wrapping_neg(self) -> $Ty {
                     let result = self.get().wrapping_neg();
                     // SAFETY: negation of nonzero cannot yield zero values.
@@ -925,7 +925,7 @@ macro_rules! nonzero_signed_operations {
                 }
             }
 
-            #[stable(feature = "signed_nonzero_neg", since = "CURRENT_RUSTC_VERSION")]
+            #[stable(feature = "signed_nonzero_neg", since = "1.71.0")]
             impl Neg for $Ty {
                 type Output = $Ty;
 
@@ -937,7 +937,7 @@ macro_rules! nonzero_signed_operations {
             }
 
             forward_ref_unop! { impl Neg, neg for $Ty,
-                #[stable(feature = "signed_nonzero_neg", since = "CURRENT_RUSTC_VERSION")] }
+                #[stable(feature = "signed_nonzero_neg", since = "1.71.0")] }
         )+
     }
 }
diff --git a/library/core/src/ptr/const_ptr.rs b/library/core/src/ptr/const_ptr.rs
index 5ee1b5e4afc..926189a17b2 100644
--- a/library/core/src/ptr/const_ptr.rs
+++ b/library/core/src/ptr/const_ptr.rs
@@ -104,6 +104,7 @@ impl<T: ?Sized> *const T {
     /// refactored.
     #[stable(feature = "ptr_const_cast", since = "1.65.0")]
     #[rustc_const_stable(feature = "ptr_const_cast", since = "1.65.0")]
+    #[rustc_diagnostic_item = "ptr_cast_mut"]
     #[inline(always)]
     pub const fn cast_mut(self) -> *mut T {
         self as _
@@ -916,16 +917,8 @@ impl<T: ?Sized> *const T {
     where
         T: Sized,
     {
-        #[cfg(bootstrap)]
         // SAFETY: the caller must uphold the safety contract for `offset`.
-        unsafe {
-            self.offset(count as isize)
-        }
-        #[cfg(not(bootstrap))]
-        // SAFETY: the caller must uphold the safety contract for `offset`.
-        unsafe {
-            intrinsics::offset(self, count)
-        }
+        unsafe { intrinsics::offset(self, count) }
     }
 
     /// Calculates the offset from a pointer in bytes (convenience for `.byte_offset(count as isize)`).
@@ -1195,7 +1188,7 @@ impl<T: ?Sized> *const T {
     ///
     /// [`ptr::read`]: crate::ptr::read()
     #[stable(feature = "pointer_methods", since = "1.26.0")]
-    #[rustc_const_stable(feature = "const_ptr_read", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_ptr_read", since = "1.71.0")]
     #[inline]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub const unsafe fn read(self) -> T
@@ -1236,7 +1229,7 @@ impl<T: ?Sized> *const T {
     ///
     /// [`ptr::read_unaligned`]: crate::ptr::read_unaligned()
     #[stable(feature = "pointer_methods", since = "1.26.0")]
-    #[rustc_const_stable(feature = "const_ptr_read", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_ptr_read", since = "1.71.0")]
     #[inline]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub const unsafe fn read_unaligned(self) -> T
diff --git a/library/core/src/ptr/mod.rs b/library/core/src/ptr/mod.rs
index ff9fa48f311..acc9ca29d41 100644
--- a/library/core/src/ptr/mod.rs
+++ b/library/core/src/ptr/mod.rs
@@ -698,6 +698,7 @@ where
 #[inline(always)]
 #[must_use]
 #[unstable(feature = "ptr_from_ref", issue = "106116")]
+#[rustc_diagnostic_item = "ptr_from_ref"]
 pub const fn from_ref<T: ?Sized>(r: &T) -> *const T {
     r
 }
@@ -1139,7 +1140,7 @@ pub const unsafe fn replace<T>(dst: *mut T, mut src: T) -> T {
 /// [valid]: self#safety
 #[inline]
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_const_stable(feature = "const_ptr_read", since = "CURRENT_RUSTC_VERSION")]
+#[rustc_const_stable(feature = "const_ptr_read", since = "1.71.0")]
 #[rustc_allow_const_fn_unstable(const_mut_refs, const_maybe_uninit_as_mut_ptr)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 pub const unsafe fn read<T>(src: *const T) -> T {
@@ -1256,7 +1257,7 @@ pub const unsafe fn read<T>(src: *const T) -> T {
 /// ```
 #[inline]
 #[stable(feature = "ptr_unaligned", since = "1.17.0")]
-#[rustc_const_stable(feature = "const_ptr_read", since = "CURRENT_RUSTC_VERSION")]
+#[rustc_const_stable(feature = "const_ptr_read", since = "1.71.0")]
 #[rustc_allow_const_fn_unstable(const_mut_refs, const_maybe_uninit_as_mut_ptr)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 pub const unsafe fn read_unaligned<T>(src: *const T) -> T {
diff --git a/library/core/src/ptr/mut_ptr.rs b/library/core/src/ptr/mut_ptr.rs
index 5edd291fb76..c6f43857887 100644
--- a/library/core/src/ptr/mut_ptr.rs
+++ b/library/core/src/ptr/mut_ptr.rs
@@ -473,20 +473,10 @@ impl<T: ?Sized> *mut T {
     where
         T: Sized,
     {
-        #[cfg(bootstrap)]
         // SAFETY: the caller must uphold the safety contract for `offset`.
         // The obtained pointer is valid for writes since the caller must
         // guarantee that it points to the same allocated object as `self`.
-        unsafe {
-            intrinsics::offset(self, count) as *mut T
-        }
-        #[cfg(not(bootstrap))]
-        // SAFETY: the caller must uphold the safety contract for `offset`.
-        // The obtained pointer is valid for writes since the caller must
-        // guarantee that it points to the same allocated object as `self`.
-        unsafe {
-            intrinsics::offset(self, count)
-        }
+        unsafe { intrinsics::offset(self, count) }
     }
 
     /// Calculates the offset from a pointer in bytes.
@@ -1026,16 +1016,8 @@ impl<T: ?Sized> *mut T {
     where
         T: Sized,
     {
-        #[cfg(bootstrap)]
-        // SAFETY: the caller must uphold the safety contract for `offset`.
-        unsafe {
-            self.offset(count as isize)
-        }
-        #[cfg(not(bootstrap))]
         // SAFETY: the caller must uphold the safety contract for `offset`.
-        unsafe {
-            intrinsics::offset(self, count)
-        }
+        unsafe { intrinsics::offset(self, count) }
     }
 
     /// Calculates the offset from a pointer in bytes (convenience for `.byte_offset(count as isize)`).
@@ -1305,7 +1287,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// [`ptr::read`]: crate::ptr::read()
     #[stable(feature = "pointer_methods", since = "1.26.0")]
-    #[rustc_const_stable(feature = "const_ptr_read", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_ptr_read", since = "1.71.0")]
     #[inline(always)]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub const unsafe fn read(self) -> T
@@ -1346,7 +1328,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// [`ptr::read_unaligned`]: crate::ptr::read_unaligned()
     #[stable(feature = "pointer_methods", since = "1.26.0")]
-    #[rustc_const_stable(feature = "const_ptr_read", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_ptr_read", since = "1.71.0")]
     #[inline(always)]
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub const unsafe fn read_unaligned(self) -> T
diff --git a/library/core/src/slice/mod.rs b/library/core/src/slice/mod.rs
index 62003ddf515..c87af35fbc4 100644
--- a/library/core/src/slice/mod.rs
+++ b/library/core/src/slice/mod.rs
@@ -1854,7 +1854,7 @@ impl<T> [T] {
     /// }
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_slice_split_at_not_mut", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_slice_split_at_not_mut", since = "1.71.0")]
     #[rustc_allow_const_fn_unstable(slice_split_at_unchecked)]
     #[inline]
     #[track_caller]
diff --git a/library/core/src/tuple.rs b/library/core/src/tuple.rs
index 172e5fccb61..a1388dfeee6 100644
--- a/library/core/src/tuple.rs
+++ b/library/core/src/tuple.rs
@@ -100,7 +100,7 @@ macro_rules! tuple_impls {
             }
         }
 
-        #[stable(feature = "array_tuple_conv", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "array_tuple_conv", since = "1.71.0")]
         impl<T> From<[T; ${count(T)}]> for ($(${ignore(T)} T,)+) {
             #[inline]
             #[allow(non_snake_case)]
@@ -110,7 +110,7 @@ macro_rules! tuple_impls {
             }
         }
 
-        #[stable(feature = "array_tuple_conv", since = "CURRENT_RUSTC_VERSION")]
+        #[stable(feature = "array_tuple_conv", since = "1.71.0")]
         impl<T> From<($(${ignore(T)} T,)+)> for [T; ${count(T)}] {
             #[inline]
             #[allow(non_snake_case)]
diff --git a/library/core/tests/clone.rs b/library/core/tests/clone.rs
index aafe5ced2e9..64193e11558 100644
--- a/library/core/tests/clone.rs
+++ b/library/core/tests/clone.rs
@@ -1,5 +1,5 @@
 #[test]
-#[cfg_attr(not(bootstrap), allow(suspicious_double_ref_op))]
+#[allow(suspicious_double_ref_op)]
 fn test_borrowed_clone() {
     let x = 5;
     let y: &i32 = &x;
diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
index 3933e328951..3e6d31fcd2f 100644
--- a/library/core/tests/lib.rs
+++ b/library/core/tests/lib.rs
@@ -109,7 +109,7 @@
 #![feature(utf8_chunks)]
 #![feature(is_ascii_octdigit)]
 #![feature(get_many_mut)]
-#![cfg_attr(not(bootstrap), feature(offset_of))]
+#![feature(offset_of)]
 #![deny(unsafe_op_in_unsafe_fn)]
 #![deny(fuzzy_provenance_casts)]
 
diff --git a/library/core/tests/mem.rs b/library/core/tests/mem.rs
index aee9c89b595..5c2e18745ea 100644
--- a/library/core/tests/mem.rs
+++ b/library/core/tests/mem.rs
@@ -366,7 +366,6 @@ fn const_maybe_uninit() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of() {
     #[repr(C)]
     struct Foo {
@@ -391,7 +390,7 @@ fn offset_of() {
     struct Generic<T> {
         x: u8,
         y: u32,
-        z: T
+        z: T,
     }
 
     trait Trait {}
@@ -409,7 +408,6 @@ fn offset_of() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of_union() {
     #[repr(C)]
     union Foo {
@@ -429,7 +427,6 @@ fn offset_of_union() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of_dst() {
     #[repr(C)]
     struct Alpha {
@@ -469,7 +466,6 @@ fn offset_of_dst() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of_packed() {
     #[repr(C, packed)]
     struct Foo {
@@ -482,7 +478,6 @@ fn offset_of_packed() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of_projection() {
     #[repr(C)]
     struct Foo {
@@ -503,7 +498,6 @@ fn offset_of_projection() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of_alias() {
     #[repr(C)]
     struct Foo {
@@ -518,7 +512,6 @@ fn offset_of_alias() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn const_offset_of() {
     #[repr(C)]
     struct Foo {
@@ -534,7 +527,6 @@ fn const_offset_of() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of_without_const_promotion() {
     #[repr(C)]
     struct Foo<SuppressConstPromotion> {
@@ -555,7 +547,6 @@ fn offset_of_without_const_promotion() {
 }
 
 #[test]
-#[cfg(not(bootstrap))]
 fn offset_of_addr() {
     #[repr(C)]
     struct Foo {
diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml
index 824abc72a22..72d910bf957 100644
--- a/library/std/Cargo.toml
+++ b/library/std/Cargo.toml
@@ -1,3 +1,5 @@
+cargo-features = ["public-dependency"]
+
 [package]
 name = "std"
 version = "0.0.0"
@@ -10,12 +12,12 @@ edition = "2021"
 crate-type = ["dylib", "rlib"]
 
 [dependencies]
-alloc = { path = "../alloc" }
+alloc = { path = "../alloc", public = true }
 cfg-if = { version = "1.0", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
-core = { path = "../core" }
-libc = { version = "0.2.143", default-features = false, features = ['rustc-dep-of-std'] }
+core = { path = "../core", public = true }
+libc = { version = "0.2.143", default-features = false, features = ['rustc-dep-of-std'], public = true }
 compiler_builtins = { version = "0.1.92" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
 unwind = { path = "../unwind" }
@@ -25,7 +27,7 @@ std_detect = { path = "../stdarch/crates/std_detect", default-features = false,
 # Dependencies of the `backtrace` crate
 addr2line = { version = "0.19.0", optional = true, default-features = false }
 rustc-demangle = { version = "0.1.21", features = ['rustc-dep-of-std'] }
-miniz_oxide = { version = "0.6.0", optional = true, default-features = false }
+miniz_oxide = { version = "0.6.0", optional = true, default-features = false, public = false }
 [dependencies.object]
 version = "0.30.0"
 optional = true
@@ -40,7 +42,7 @@ rand_xorshift = "0.3.0"
 dlmalloc = { version = "0.2.3", features = ['rustc-dep-of-std'] }
 
 [target.x86_64-fortanix-unknown-sgx.dependencies]
-fortanix-sgx-abi = { version = "0.5.0", features = ['rustc-dep-of-std'] }
+fortanix-sgx-abi = { version = "0.5.0", features = ['rustc-dep-of-std'], public = true }
 
 [target.'cfg(target_os = "hermit")'.dependencies]
 hermit-abi = { version = "0.3.0", features = ['rustc-dep-of-std'] }
diff --git a/library/std/src/os/windows/io/handle.rs b/library/std/src/os/windows/io/handle.rs
index cbf8209a5ad..274af08a388 100644
--- a/library/std/src/os/windows/io/handle.rs
+++ b/library/std/src/os/windows/io/handle.rs
@@ -437,7 +437,7 @@ impl<T: AsHandle> AsHandle for &mut T {
     }
 }
 
-#[stable(feature = "as_windows_ptrs", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "as_windows_ptrs", since = "1.71.0")]
 /// This impl allows implementing traits that require `AsHandle` on Arc.
 /// ```
 /// # #[cfg(windows)] mod group_cfg {
@@ -457,7 +457,7 @@ impl<T: AsHandle> AsHandle for crate::sync::Arc<T> {
     }
 }
 
-#[stable(feature = "as_windows_ptrs", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "as_windows_ptrs", since = "1.71.0")]
 impl<T: AsHandle> AsHandle for crate::rc::Rc<T> {
     #[inline]
     fn as_handle(&self) -> BorrowedHandle<'_> {
@@ -465,7 +465,7 @@ impl<T: AsHandle> AsHandle for crate::rc::Rc<T> {
     }
 }
 
-#[stable(feature = "as_windows_ptrs", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "as_windows_ptrs", since = "1.71.0")]
 impl<T: AsHandle> AsHandle for Box<T> {
     #[inline]
     fn as_handle(&self) -> BorrowedHandle<'_> {
diff --git a/library/std/src/os/windows/io/socket.rs b/library/std/src/os/windows/io/socket.rs
index 0c90d55c024..6359835cad5 100644
--- a/library/std/src/os/windows/io/socket.rs
+++ b/library/std/src/os/windows/io/socket.rs
@@ -254,7 +254,7 @@ impl<T: AsSocket> AsSocket for &mut T {
     }
 }
 
-#[stable(feature = "as_windows_ptrs", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "as_windows_ptrs", since = "1.71.0")]
 /// This impl allows implementing traits that require `AsSocket` on Arc.
 /// ```
 /// # #[cfg(windows)] mod group_cfg {
@@ -274,7 +274,7 @@ impl<T: AsSocket> AsSocket for crate::sync::Arc<T> {
     }
 }
 
-#[stable(feature = "as_windows_ptrs", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "as_windows_ptrs", since = "1.71.0")]
 impl<T: AsSocket> AsSocket for crate::rc::Rc<T> {
     #[inline]
     fn as_socket(&self) -> BorrowedSocket<'_> {
@@ -282,7 +282,7 @@ impl<T: AsSocket> AsSocket for crate::rc::Rc<T> {
     }
 }
 
-#[stable(feature = "as_windows_ptrs", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "as_windows_ptrs", since = "1.71.0")]
 impl<T: AsSocket> AsSocket for Box<T> {
     #[inline]
     fn as_socket(&self) -> BorrowedSocket<'_> {
diff --git a/library/std/src/sys/wasi/fd.rs b/library/std/src/sys/wasi/fd.rs
index 9a8b2a0be5b..1b50c2ea6dd 100644
--- a/library/std/src/sys/wasi/fd.rs
+++ b/library/std/src/sys/wasi/fd.rs
@@ -96,7 +96,7 @@ impl WasiFd {
         unsafe { wasi::fd_sync(self.as_raw_fd() as wasi::Fd).map_err(err2io) }
     }
 
-    pub fn advise(&self, offset: u64, len: u64, advice: wasi::Advice) -> io::Result<()> {
+    pub(crate) fn advise(&self, offset: u64, len: u64, advice: wasi::Advice) -> io::Result<()> {
         unsafe {
             wasi::fd_advise(self.as_raw_fd() as wasi::Fd, offset, len, advice).map_err(err2io)
         }
@@ -179,7 +179,7 @@ impl WasiFd {
         }
     }
 
-    pub fn filestat_get(&self) -> io::Result<wasi::Filestat> {
+    pub(crate) fn filestat_get(&self) -> io::Result<wasi::Filestat> {
         unsafe { wasi::fd_filestat_get(self.as_raw_fd() as wasi::Fd).map_err(err2io) }
     }
 
@@ -199,7 +199,7 @@ impl WasiFd {
         unsafe { wasi::fd_filestat_set_size(self.as_raw_fd() as wasi::Fd, size).map_err(err2io) }
     }
 
-    pub fn path_filestat_get(
+    pub(crate) fn path_filestat_get(
         &self,
         flags: wasi::Lookupflags,
         path: &str,
diff --git a/library/std/src/sys/wasi/fs.rs b/library/std/src/sys/wasi/fs.rs
index 8d1dbf59155..437aae3ae7f 100644
--- a/library/std/src/sys/wasi/fs.rs
+++ b/library/std/src/sys/wasi/fs.rs
@@ -104,7 +104,7 @@ impl FileAttr {
         Ok(SystemTime::from_wasi_timestamp(self.meta.ctim))
     }
 
-    pub fn as_wasi(&self) -> &wasi::Filestat {
+    pub(crate) fn as_wasi(&self) -> &wasi::Filestat {
         &self.meta
     }
 }
@@ -142,7 +142,7 @@ impl FileType {
         self.bits == wasi::FILETYPE_SYMBOLIC_LINK
     }
 
-    pub fn bits(&self) -> wasi::Filetype {
+    pub(crate) fn bits(&self) -> wasi::Filetype {
         self.bits
     }
 }
diff --git a/library/std/src/sys/windows/stdio.rs b/library/std/src/sys/windows/stdio.rs
index 2e3e0859dc1..3fcaaa508e3 100644
--- a/library/std/src/sys/windows/stdio.rs
+++ b/library/std/src/sys/windows/stdio.rs
@@ -11,6 +11,9 @@ use crate::sys::cvt;
 use crate::sys::handle::Handle;
 use core::str::utf8_char_width;
 
+#[cfg(test)]
+mod tests;
+
 // Don't cache handles but get them fresh for every read/write. This allows us to track changes to
 // the value over time (such as if a process calls `SetStdHandle` while it's running). See #40490.
 pub struct Stdin {
@@ -383,6 +386,10 @@ fn utf16_to_utf8(utf16: &[u16], utf8: &mut [u8]) -> io::Result<usize> {
     debug_assert!(utf16.len() <= c::c_int::MAX as usize);
     debug_assert!(utf8.len() <= c::c_int::MAX as usize);
 
+    if utf16.is_empty() {
+        return Ok(0);
+    }
+
     let result = unsafe {
         c::WideCharToMultiByte(
             c::CP_UTF8,              // CodePage
diff --git a/library/std/src/sys/windows/stdio/tests.rs b/library/std/src/sys/windows/stdio/tests.rs
new file mode 100644
index 00000000000..1e53e0bee63
--- /dev/null
+++ b/library/std/src/sys/windows/stdio/tests.rs
@@ -0,0 +1,6 @@
+use super::utf16_to_utf8;
+
+#[test]
+fn zero_size_read() {
+    assert_eq!(utf16_to_utf8(&[], &mut []).unwrap(), 0);
+}
diff --git a/library/std/tests/common/mod.rs b/library/std/tests/common/mod.rs
index fce220223a0..358c2c3f9b2 100644
--- a/library/std/tests/common/mod.rs
+++ b/library/std/tests/common/mod.rs
@@ -20,15 +20,15 @@ pub(crate) fn test_rng() -> rand_xorshift::XorShiftRng {
 }
 
 // Copied from std::sys_common::io
-pub struct TempDir(PathBuf);
+pub(crate) struct TempDir(PathBuf);
 
 impl TempDir {
-    pub fn join(&self, path: &str) -> PathBuf {
+    pub(crate) fn join(&self, path: &str) -> PathBuf {
         let TempDir(ref p) = *self;
         p.join(path)
     }
 
-    pub fn path(&self) -> &Path {
+    pub(crate) fn path(&self) -> &Path {
         let TempDir(ref p) = *self;
         p
     }
@@ -49,7 +49,7 @@ impl Drop for TempDir {
 }
 
 #[track_caller] // for `test_rng`
-pub fn tmpdir() -> TempDir {
+pub(crate) fn tmpdir() -> TempDir {
     let p = env::temp_dir();
     let mut r = test_rng();
     let ret = p.join(&format!("rust-{}", r.next_u32()));