Merge subtree update for toolchain nightly-2025-04-01

library/Cargo.toml

@@ -8,7 +8,6 @@ members = [
 ]
 
 exclude = [
-  "literal-escaper",
   # stdarch has its own Cargo workspace
   "stdarch",
   "windows_targets"

library/alloc/Cargo.toml

@@ -16,7 +16,7 @@ bench = false
 
 [dependencies]
 core = { path = "../core", public = true }
-compiler_builtins = { version = "=0.1.151", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "=0.1.152", features = ['rustc-dep-of-std'] }
 safety = { path = "../contracts/safety" }
 
 [features]

library/alloc/src/alloc.rs

@@ -10,25 +10,28 @@ use core::ptr::{self, NonNull};
 
 unsafe extern "Rust" {
     // These are the magic symbols to call the global allocator. rustc generates
-    // them to call `__rg_alloc` etc. if there is a `#[global_allocator]` attribute
+    // them to call the global allocator if there is a `#[global_allocator]` attribute
     // (the code expanding that attribute macro generates those functions), or to call
     // the default implementations in std (`__rdl_alloc` etc. in `library/std/src/alloc.rs`)
     // otherwise.
-    // The rustc fork of LLVM 14 and earlier also special-cases these function names to be able to optimize them
-    // like `malloc`, `realloc`, and `free`, respectively.
     #[rustc_allocator]
     #[rustc_nounwind]
+    #[cfg_attr(not(bootstrap), rustc_std_internal_symbol)]
     fn __rust_alloc(size: usize, align: usize) -> *mut u8;
     #[rustc_deallocator]
     #[rustc_nounwind]
+    #[cfg_attr(not(bootstrap), rustc_std_internal_symbol)]
     fn __rust_dealloc(ptr: *mut u8, size: usize, align: usize);
     #[rustc_reallocator]
     #[rustc_nounwind]
+    #[cfg_attr(not(bootstrap), rustc_std_internal_symbol)]
     fn __rust_realloc(ptr: *mut u8, old_size: usize, align: usize, new_size: usize) -> *mut u8;
     #[rustc_allocator_zeroed]
     #[rustc_nounwind]
+    #[cfg_attr(not(bootstrap), rustc_std_internal_symbol)]
     fn __rust_alloc_zeroed(size: usize, align: usize) -> *mut u8;
 
+    #[cfg_attr(not(bootstrap), rustc_std_internal_symbol)]
     static __rust_no_alloc_shim_is_unstable: u8;
 }
 
@@ -357,6 +360,7 @@ unsafe extern "Rust" {
     // This is the magic symbol to call the global alloc error handler. rustc generates
     // it to call `__rg_oom` if there is a `#[alloc_error_handler]`, or to call the
     // default implementations below (`__rdl_oom`) otherwise.
+    #[cfg_attr(not(bootstrap), rustc_std_internal_symbol)]
     fn __rust_alloc_error_handler(size: usize, align: usize) -> !;
 }
 
@@ -423,6 +427,7 @@ pub mod __alloc_error_handler {
         unsafe extern "Rust" {
             // This symbol is emitted by rustc next to __rust_alloc_error_handler.
             // Its value depends on the -Zoom={panic,abort} compiler option.
+            #[cfg_attr(not(bootstrap), rustc_std_internal_symbol)]
             static __rust_alloc_error_handler_should_panic: u8;
         }
 

library/alloc/src/boxed.rs

@@ -1149,9 +1149,8 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     ///
     /// [memory layout]: self#memory-layout
     #[unstable(feature = "allocator_api", issue = "32838")]
-    #[rustc_const_unstable(feature = "const_box", issue = "92521")]
     #[inline]
-    pub const unsafe fn from_raw_in(raw: *mut T, alloc: A) -> Self {
+    pub unsafe fn from_raw_in(raw: *mut T, alloc: A) -> Self {
         Box(unsafe { Unique::new_unchecked(raw) }, alloc)
     }
 
@@ -1203,9 +1202,8 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     /// [memory layout]: self#memory-layout
     #[unstable(feature = "allocator_api", issue = "32838")]
     // #[unstable(feature = "box_vec_non_null", reason = "new API", issue = "130364")]
-    #[rustc_const_unstable(feature = "const_box", issue = "92521")]
     #[inline]
-    pub const unsafe fn from_non_null_in(raw: NonNull<T>, alloc: A) -> Self {
+    pub unsafe fn from_non_null_in(raw: NonNull<T>, alloc: A) -> Self {
         // SAFETY: guaranteed by the caller.
         unsafe { Box::from_raw_in(raw.as_ptr(), alloc) }
     }
@@ -1550,9 +1548,8 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     /// to call it as `Box::allocator(&b)` instead of `b.allocator()`. This
     /// is so that there is no conflict with a method on the inner type.
     #[unstable(feature = "allocator_api", issue = "32838")]
-    #[rustc_const_unstable(feature = "const_box", issue = "92521")]
     #[inline]
-    pub const fn allocator(b: &Self) -> &A {
+    pub fn allocator(b: &Self) -> &A {
         &b.1
     }
 
@@ -1639,8 +1636,7 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     /// let bar = Pin::from(foo);
     /// ```
     #[stable(feature = "box_into_pin", since = "1.63.0")]
-    #[rustc_const_unstable(feature = "const_box", issue = "92521")]
-    pub const fn into_pin(boxed: Self) -> Pin<Self>
+    pub fn into_pin(boxed: Self) -> Pin<Self>
     where
         A: 'static,
     {