Auto merge of #103858 - Mark-Simulacrum:bump-bootstrap, r=pietroalbini

Bump bootstrap compiler to 1.66

This PR:

- Bumps version placeholders to release
- Bumps to latest beta
- cfg-steps code

r? `@pietroalbini`

Author: bors

compiler/rustc_ast/src/visit.rs

@@ -251,7 +251,7 @@ pub trait Visitor<'ast>: Sized {
 macro_rules! walk_list {
     ($visitor: expr, $method: ident, $list: expr $(, $($extra_args: expr),* )?) => {
         {
-            #[cfg_attr(not(bootstrap), allow(for_loops_over_fallibles))]
+            #[allow(for_loops_over_fallibles)]
             for elem in $list {
                 $visitor.$method(elem $(, $($extra_args,)* )?)
             }

compiler/rustc_errors/src/diagnostic.rs

@@ -64,8 +64,7 @@ impl<'source> Into<FluentValue<'source>> for DiagnosticArgValue<'source> {
 
 /// Trait implemented by error types. This should not be implemented manually. Instead, use
 /// `#[derive(Subdiagnostic)]` -- see [rustc_macros::Subdiagnostic].
-#[cfg_attr(bootstrap, rustc_diagnostic_item = "AddSubdiagnostic")]
-#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "AddToDiagnostic")]
+#[rustc_diagnostic_item = "AddToDiagnostic"]
 pub trait AddToDiagnostic
 where
     Self: Sized,

compiler/rustc_errors/src/diagnostic_builder.rs

@@ -16,8 +16,7 @@ use std::thread::panicking;
 
 /// Trait implemented by error types. This should not be implemented manually. Instead, use
 /// `#[derive(Diagnostic)]` -- see [rustc_macros::Diagnostic].
-#[cfg_attr(bootstrap, rustc_diagnostic_item = "SessionDiagnostic")]
-#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "IntoDiagnostic")]
+#[rustc_diagnostic_item = "IntoDiagnostic"]
 pub trait IntoDiagnostic<'a, T: EmissionGuarantee = ErrorGuaranteed> {
     /// Write out as a diagnostic out of `Handler`.
     #[must_use]

compiler/rustc_feature/src/accepted.rs

@@ -54,9 +54,9 @@ declare_features! (
     /// Allows using ADX intrinsics from `core::arch::{x86, x86_64}`.
     (accepted, adx_target_feature, "1.61.0", Some(44839), None),
     /// Allows explicit discriminants on non-unit enum variants.
-    (accepted, arbitrary_enum_discriminant, "CURRENT_RUSTC_VERSION", Some(60553), None),
+    (accepted, arbitrary_enum_discriminant, "1.66.0", Some(60553), None),
     /// Allows using `sym` operands in inline assembly.
-    (accepted, asm_sym, "CURRENT_RUSTC_VERSION", Some(93333), None),
+    (accepted, asm_sym, "1.66.0", Some(93333), None),
     /// Allows the definition of associated constants in `trait` or `impl` blocks.
     (accepted, associated_consts, "1.20.0", Some(29646), None),
     /// Allows using associated `type`s in `trait`s.
@@ -174,7 +174,7 @@ declare_features! (
     // FIXME: explain `globs`.
     (accepted, globs, "1.0.0", None, None),
     /// Allows using `..=X` as a pattern.
-    (accepted, half_open_range_patterns, "CURRENT_RUSTC_VERSION", Some(67264), None),
+    (accepted, half_open_range_patterns, "1.66.0", Some(67264), None),
     /// Allows using the `u128` and `i128` types.
     (accepted, i128_type, "1.26.0", Some(35118), None),
     /// Allows the use of `if let` expressions.

compiler/rustc_feature/src/active.rs

@@ -311,7 +311,7 @@ declare_features! (
     /// Allows `async || body` closures.
     (active, async_closure, "1.37.0", Some(62290), None),
     /// Alows async functions to be declared, implemented, and used in traits.
-    (incomplete, async_fn_in_trait, "CURRENT_RUSTC_VERSION", Some(91611), None),
+    (incomplete, async_fn_in_trait, "1.66.0", Some(91611), None),
     /// Allows `extern "C-unwind" fn` to enable unwinding across ABI boundaries.
     (active, c_unwind, "1.52.0", Some(74990), None),
     /// Allows using C-variadics.
@@ -414,7 +414,7 @@ declare_features! (
     /// Allows non-trivial generic constants which have to have wfness manually propagated to callers
     (incomplete, generic_const_exprs, "1.56.0", Some(76560), None),
     /// Allows using `..=X` as a patterns in slices.
-    (active, half_open_range_patterns_in_slices, "CURRENT_RUSTC_VERSION", Some(67264), None),
+    (active, half_open_range_patterns_in_slices, "1.66.0", Some(67264), None),
     /// Allows `if let` guard in match arms.
     (active, if_let_guard, "1.47.0", Some(51114), None),
     /// Allows `impl Trait` as output type in `Fn` traits in return position of functions.

compiler/rustc_middle/src/lib.rs

@@ -43,7 +43,6 @@
 #![feature(type_alias_impl_trait)]
 #![feature(associated_type_bounds)]
 #![feature(rustc_attrs)]
-#![cfg_attr(bootstrap, feature(half_open_range_patterns))]
 #![feature(control_flow_enum)]
 #![feature(associated_type_defaults)]
 #![feature(trusted_step)]

library/alloc/src/alloc.rs

@@ -28,20 +28,16 @@ extern "Rust" {
     // 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]
-    #[cfg_attr(not(bootstrap), rustc_nounwind)]
-    #[cfg_attr(bootstrap, rustc_allocator_nounwind)]
+    #[rustc_nounwind]
     fn __rust_alloc(size: usize, align: usize) -> *mut u8;
     #[rustc_deallocator]
-    #[cfg_attr(not(bootstrap), rustc_nounwind)]
-    #[cfg_attr(bootstrap, rustc_allocator_nounwind)]
+    #[rustc_nounwind]
     fn __rust_dealloc(ptr: *mut u8, size: usize, align: usize);
     #[rustc_reallocator]
-    #[cfg_attr(not(bootstrap), rustc_nounwind)]
-    #[cfg_attr(bootstrap, rustc_allocator_nounwind)]
+    #[rustc_nounwind]
     fn __rust_realloc(ptr: *mut u8, old_size: usize, align: usize, new_size: usize) -> *mut u8;
     #[rustc_allocator_zeroed]
-    #[cfg_attr(not(bootstrap), rustc_nounwind)]
-    #[cfg_attr(bootstrap, rustc_allocator_nounwind)]
+    #[rustc_nounwind]
     fn __rust_alloc_zeroed(size: usize, align: usize) -> *mut u8;
 }
 

library/alloc/src/boxed.rs

@@ -1661,7 +1661,7 @@ impl<T, const N: usize> TryFrom<Box<[T]>> for Box<[T; N]> {
 }
 
 #[cfg(not(no_global_oom_handling))]
-#[stable(feature = "boxed_array_try_from_vec", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "boxed_array_try_from_vec", since = "1.66.0")]
 impl<T, const N: usize> TryFrom<Vec<T>> for Box<[T; N]> {
     type Error = Vec<T>;
 

library/alloc/src/collections/btree/map.rs

@@ -580,7 +580,7 @@ impl<K, V> BTreeMap<K, V> {
     /// map.insert(1, "a");
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_btree_new", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_btree_new", since = "1.66.0")]
     #[must_use]
     pub const fn new() -> BTreeMap<K, V> {
         BTreeMap { root: None, length: 0, alloc: ManuallyDrop::new(Global), _marker: PhantomData }
@@ -711,7 +711,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// map.insert(2, "a");
     /// assert_eq!(map.first_key_value(), Some((&1, &"b")));
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn first_key_value(&self) -> Option<(&K, &V)>
     where
         K: Ord,
@@ -739,7 +739,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// assert_eq!(*map.get(&1).unwrap(), "first");
     /// assert_eq!(*map.get(&2).unwrap(), "b");
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn first_entry(&mut self) -> Option<OccupiedEntry<'_, K, V, A>>
     where
         K: Ord,
@@ -773,7 +773,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// }
     /// assert!(map.is_empty());
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn pop_first(&mut self) -> Option<(K, V)>
     where
         K: Ord,
@@ -796,7 +796,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// map.insert(2, "a");
     /// assert_eq!(map.last_key_value(), Some((&2, &"a")));
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn last_key_value(&self) -> Option<(&K, &V)>
     where
         K: Ord,
@@ -824,7 +824,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// assert_eq!(*map.get(&1).unwrap(), "a");
     /// assert_eq!(*map.get(&2).unwrap(), "last");
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn last_entry(&mut self) -> Option<OccupiedEntry<'_, K, V, A>>
     where
         K: Ord,
@@ -858,7 +858,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// }
     /// assert!(map.is_empty());
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn pop_last(&mut self) -> Option<(K, V)>
     where
         K: Ord,

library/alloc/src/collections/btree/set.rs

@@ -343,7 +343,7 @@ impl<T> BTreeSet<T> {
     /// let mut set: BTreeSet<i32> = BTreeSet::new();
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_btree_new", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_btree_new", since = "1.66.0")]
     #[must_use]
     pub const fn new() -> BTreeSet<T> {
         BTreeSet { map: BTreeMap::new() }
@@ -796,7 +796,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
     /// assert_eq!(set.first(), Some(&1));
     /// ```
     #[must_use]
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn first(&self) -> Option<&T>
     where
         T: Ord,
@@ -822,7 +822,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
     /// assert_eq!(set.last(), Some(&2));
     /// ```
     #[must_use]
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn last(&self) -> Option<&T>
     where
         T: Ord,
@@ -846,7 +846,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
     /// }
     /// assert!(set.is_empty());
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn pop_first(&mut self) -> Option<T>
     where
         T: Ord,
@@ -870,7 +870,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
     /// }
     /// assert!(set.is_empty());
     /// ```
-    #[stable(feature = "map_first_last", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "map_first_last", since = "1.66.0")]
     pub fn pop_last(&mut self) -> Option<T>
     where
         T: Ord,

library/core/src/default.rs

@@ -99,7 +99,7 @@
 /// ```
 #[cfg_attr(not(test), rustc_diagnostic_item = "Default")]
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(bootstrap), const_trait)]
+#[const_trait]
 pub trait Default: Sized {
     /// Returns the "default value" for a type.
     ///

library/core/src/error.rs

@@ -493,7 +493,7 @@ impl Error for crate::char::ParseCharError {
     }
 }
 
-#[stable(feature = "duration_checked_float", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "duration_checked_float", since = "1.66.0")]
 impl Error for crate::time::TryFromFloatSecsError {}
 
 #[stable(feature = "frombyteswithnulerror_impls", since = "1.17.0")]

library/core/src/hint.rs

@@ -220,7 +220,7 @@ pub fn spin_loop() {
 ///
 /// [`std::convert::identity`]: crate::convert::identity
 #[inline]
-#[stable(feature = "bench_black_box", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "bench_black_box", since = "1.66.0")]
 #[rustc_const_unstable(feature = "const_black_box", issue = "none")]
 pub const fn black_box<T>(dummy: T) -> T {
     crate::intrinsics::black_box(dummy)