Bump bootstrap compiler to 1.68

compiler/rustc_const_eval/src/interpret/intern.rs

@@ -30,15 +30,15 @@ use super::{
 use crate::const_eval;
 
 pub trait CompileTimeMachine<'mir, 'tcx, T> = Machine<
-    'mir,
-    'tcx,
-    MemoryKind = T,
-    Provenance = AllocId,
-    ExtraFnVal = !,
-    FrameExtra = (),
-    AllocExtra = (),
-    MemoryMap = FxIndexMap<AllocId, (MemoryKind<T>, Allocation)>,
->;
+        'mir,
+        'tcx,
+        MemoryKind = T,
+        Provenance = AllocId,
+        ExtraFnVal = !,
+        FrameExtra = (),
+        AllocExtra = (),
+        MemoryMap = FxIndexMap<AllocId, (MemoryKind<T>, Allocation)>,
+    >;
 
 struct InternVisitor<'rt, 'mir, 'tcx, M: CompileTimeMachine<'mir, 'tcx, const_eval::MemoryKind>> {
     /// The ectx from which we intern.

compiler/rustc_data_structures/src/obligation_forest/mod.rs

@@ -95,10 +95,7 @@ pub trait ForestObligation: Clone + Debug {
 pub trait ObligationProcessor {
     type Obligation: ForestObligation;
     type Error: Debug;
-    type OUT: OutcomeTrait<
-        Obligation = Self::Obligation,
-        Error = Error<Self::Obligation, Self::Error>,
-    >;
+    type OUT: OutcomeTrait<Obligation = Self::Obligation, Error = Error<Self::Obligation, Self::Error>>;
 
     fn needs_process_obligation(&self, obligation: &Self::Obligation) -> bool;
 

compiler/rustc_feature/src/accepted.rs

@@ -49,7 +49,7 @@ declare_features! (
     /// Allows `#[target_feature(...)]` on aarch64 platforms
     (accepted, aarch64_target_feature, "1.61.0", Some(44839), None),
     /// Allows using the `efiapi` ABI.
-    (accepted, abi_efiapi, "CURRENT_RUSTC_VERSION", Some(65815), None),
+    (accepted, abi_efiapi, "1.68.0", Some(65815), None),
     /// Allows the sysV64 ABI to be specified on all platforms
     /// instead of just the platforms on which it is the C ABI.
     (accepted, abi_sysv64, "1.24.0", Some(36167), None),
@@ -129,7 +129,7 @@ declare_features! (
     /// Allows `crate` in paths.
     (accepted, crate_in_paths, "1.30.0", Some(45477), None),
     /// Allows rustc to inject a default alloc_error_handler
-    (accepted, default_alloc_error_handler, "CURRENT_RUSTC_VERSION", Some(66741), None),
+    (accepted, default_alloc_error_handler, "1.68.0", Some(66741), None),
     /// Allows using assigning a default type to type parameters in algebraic data type definitions.
     (accepted, default_type_params, "1.0.0", None, None),
     /// Allows `#[deprecated]` attribute.
@@ -164,7 +164,7 @@ declare_features! (
     /// Allows access to crate names passed via `--extern` through prelude.
     (accepted, extern_prelude, "1.30.0", Some(44660), None),
     /// Allows using F16C intrinsics from `core::arch::{x86, x86_64}`.
-    (accepted, f16c_target_feature, "CURRENT_RUSTC_VERSION", Some(44839), None),
+    (accepted, f16c_target_feature, "1.68.0", Some(44839), None),
     /// Allows field shorthands (`x` meaning `x: x`) in struct literal expressions.
     (accepted, field_init_shorthand, "1.17.0", Some(37340), None),
     /// Allows `#[must_use]` on functions, and introduces must-use operators (RFC 1940).

compiler/rustc_feature/src/active.rs

@@ -340,7 +340,7 @@ declare_features! (
     /// Allows `async {}` expressions in const contexts.
     (active, const_async_blocks, "1.53.0", Some(85368), None),
     /// Allows `const || {}` closures in const contexts.
-    (incomplete, const_closures, "CURRENT_RUSTC_VERSION", Some(106003), None),
+    (incomplete, const_closures, "1.68.0", Some(106003), None),
     /// Allows limiting the evaluation steps of const expressions
     (active, const_eval_limit, "1.43.0", Some(67217), None),
     /// Allows the definition of `const extern fn` and `const unsafe extern fn`.

library/alloc/src/collections/vec_deque/mod.rs

@@ -537,7 +537,7 @@ impl<T> VecDeque<T> {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_vec_deque_new", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_vec_deque_new", since = "1.68.0")]
     #[must_use]
     pub const fn new() -> VecDeque<T> {
         // FIXME: This should just be `VecDeque::new_in(Global)` once that hits stable.

library/alloc/src/string.rs

@@ -2549,7 +2549,7 @@ impl ToString for char {
 }
 
 #[cfg(not(no_global_oom_handling))]
-#[stable(feature = "bool_to_string_specialization", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "bool_to_string_specialization", since = "1.68.0")]
 impl ToString for bool {
     #[inline]
     fn to_string(&self) -> String {

library/core/src/cmp.rs

@@ -798,16 +798,7 @@ pub trait Ord: Eq + PartialOrd<Self> {
         Self: Sized,
         Self: ~const Destruct,
     {
-        #[cfg(not(bootstrap))]
-        {
-            max_by(self, other, Ord::cmp)
-        }
-
-        #[cfg(bootstrap)]
-        match self.cmp(&other) {
-            Ordering::Less | Ordering::Equal => other,
-            Ordering::Greater => self,
-        }
+        max_by(self, other, Ord::cmp)
     }
 
     /// Compares and returns the minimum of two values.
@@ -828,16 +819,7 @@ pub trait Ord: Eq + PartialOrd<Self> {
         Self: Sized,
         Self: ~const Destruct,
     {
-        #[cfg(not(bootstrap))]
-        {
-            min_by(self, other, Ord::cmp)
-        }
-
-        #[cfg(bootstrap)]
-        match self.cmp(&other) {
-            Ordering::Less | Ordering::Equal => self,
-            Ordering::Greater => other,
-        }
+        min_by(self, other, Ord::cmp)
     }
 
     /// Restrict a value to a certain interval.
@@ -1234,23 +1216,7 @@ where
     F: ~const Destruct,
     K: ~const Destruct,
 {
-    cfg_if! {
-        if #[cfg(bootstrap)] {
-            const fn imp<T, F: ~const FnMut(&T) -> K, K: ~const Ord>(
-                f: &mut F,
-                (v1, v2): (&T, &T),
-            ) -> Ordering
-            where
-                T: ~const Destruct,
-                K: ~const Destruct,
-            {
-                f(v1).cmp(&f(v2))
-            }
-            min_by(v1, v2, ConstFnMutClosure::new(&mut f, imp))
-        } else {
-            min_by(v1, v2, const |v1, v2| f(v1).cmp(&f(v2)))
-        }
-    }
+    min_by(v1, v2, const |v1, v2| f(v1).cmp(&f(v2)))
 }
 
 /// Compares and returns the maximum of two values.

library/core/src/convert/num.rs

@@ -169,7 +169,7 @@ impl_from! { u32, f64, #[stable(feature = "lossless_float_conv", since = "1.6.0"
 impl_from! { f32, f64, #[stable(feature = "lossless_float_conv", since = "1.6.0")] }
 
 // bool -> Float
-#[stable(feature = "float_from_bool", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "float_from_bool", since = "1.68.0")]
 #[rustc_const_unstable(feature = "const_num_from_num", issue = "87852")]
 impl const From<bool> for f32 {
     /// Converts `bool` to `f32` losslessly.
@@ -178,7 +178,7 @@ impl const From<bool> for f32 {
         small as u8 as Self
     }
 }
-#[stable(feature = "float_from_bool", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "float_from_bool", since = "1.68.0")]
 #[rustc_const_unstable(feature = "const_num_from_num", issue = "87852")]
 impl const From<bool> for f64 {
     /// Converts `bool` to `f64` losslessly.

library/core/src/intrinsics.rs

@@ -58,7 +58,6 @@ use crate::marker::DiscriminantKind;
 use crate::marker::Tuple;
 use crate::mem;
 
-#[cfg(not(bootstrap))]
 pub mod mir;
 
 // These imports are used for simplifying intra-doc links
@@ -963,7 +962,6 @@ extern "rust-intrinsic" {
     /// This intrinsic does not have a stable counterpart.
     #[rustc_const_unstable(feature = "const_assert_type2", issue = "none")]
     #[rustc_safe_intrinsic]
-    #[cfg(not(bootstrap))]
     pub fn assert_mem_uninitialized_valid<T>();
 
     /// Gets a reference to a static `Location` indicating where it was called.

library/core/src/intrinsics/mir.rs

@@ -60,8 +60,7 @@
 //!
 //! # Examples
 //!
-#![cfg_attr(bootstrap, doc = "```rust,compile_fail")]
-#![cfg_attr(not(bootstrap), doc = "```rust")]
+//! ```rust
 //! #![feature(core_intrinsics, custom_mir)]
 //!
 //! extern crate core;
@@ -294,8 +293,7 @@ define!(
     ///
     /// # Examples
     ///
-    #[cfg_attr(bootstrap, doc = "```rust,compile_fail")]
-    #[cfg_attr(not(bootstrap), doc = "```rust")]
+    /// ```rust
     /// #![feature(custom_mir, core_intrinsics)]
     ///
     /// extern crate core;

library/core/src/iter/sources/once_with.rs

@@ -73,7 +73,7 @@ pub struct OnceWith<F> {
     gen: Option<F>,
 }
 
-#[stable(feature = "iter_once_with_debug", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "iter_once_with_debug", since = "1.68.0")]
 impl<F> fmt::Debug for OnceWith<F> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if self.gen.is_some() {

library/core/src/iter/sources/repeat_with.rs

@@ -78,7 +78,7 @@ pub struct RepeatWith<F> {
     repeater: F,
 }
 
-#[stable(feature = "iterator_repeat_with_debug", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "iterator_repeat_with_debug", since = "1.68.0")]
 impl<F> fmt::Debug for RepeatWith<F> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("RepeatWith").finish_non_exhaustive()

library/core/src/lib.rs

@@ -191,7 +191,7 @@
 #![feature(cfg_sanitize)]
 #![feature(cfg_target_has_atomic)]
 #![feature(cfg_target_has_atomic_equal_alignment)]
-#![cfg_attr(not(bootstrap), feature(const_closures))]
+#![feature(const_closures)]
 #![feature(const_fn_floating_point_arithmetic)]
 #![feature(const_mut_refs)]
 #![feature(const_precise_live_drops)]
@@ -248,7 +248,6 @@
 #![feature(sse4a_target_feature)]
 #![feature(tbm_target_feature)]
 #![feature(wasm_target_feature)]
-#![cfg_attr(bootstrap, feature(f16c_target_feature))]
 
 // allow using `core::` in intra-doc links
 #[allow(unused_extern_crates)]

library/core/src/mem/mod.rs

@@ -682,7 +682,6 @@ pub unsafe fn zeroed<T>() -> T {
 pub unsafe fn uninitialized<T>() -> T {
     // SAFETY: the caller must guarantee that an uninitialized value is valid for `T`.
     unsafe {
-        #[cfg(not(bootstrap))] // If the compiler hits this itself then it deserves the UB.
         intrinsics::assert_mem_uninitialized_valid::<T>();
         let mut val = MaybeUninit::<T>::uninit();
 

library/core/src/panicking.rs

@@ -117,7 +117,7 @@ pub const fn panic(expr: &'static str) -> ! {
 /// Like `panic`, but without unwinding and track_caller to reduce the impact on codesize.
 #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never), cold)]
 #[cfg_attr(feature = "panic_immediate_abort", inline)]
-#[cfg_attr(not(bootstrap), lang = "panic_nounwind")] // needed by codegen for non-unwinding panics
+#[lang = "panic_nounwind"] // needed by codegen for non-unwinding panics
 #[rustc_nounwind]
 pub fn panic_nounwind(expr: &'static str) -> ! {
     panic_nounwind_fmt(fmt::Arguments::new_v1(&[expr], &[]));
@@ -165,8 +165,7 @@ fn panic_bounds_check(index: usize, len: usize) -> ! {
 /// any extra arguments (including those synthesized by track_caller).
 #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never), cold)]
 #[cfg_attr(feature = "panic_immediate_abort", inline)]
-#[cfg_attr(bootstrap, lang = "panic_no_unwind")] // needed by codegen for panic in nounwind function
-#[cfg_attr(not(bootstrap), lang = "panic_cannot_unwind")] // needed by codegen for panic in nounwind function
+#[lang = "panic_cannot_unwind"] // needed by codegen for panic in nounwind function
 #[rustc_nounwind]
 fn panic_cannot_unwind() -> ! {
     panic_nounwind("panic in a function that cannot unwind")

library/core/src/pin.rs

@@ -1164,7 +1164,7 @@ impl<P, U> DispatchFromDyn<Pin<U>> for Pin<P> where P: DispatchFromDyn<U> {}
 /// constructor.
 ///
 /// [`Box::pin`]: ../../std/boxed/struct.Box.html#method.pin
-#[stable(feature = "pin_macro", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "pin_macro", since = "1.68.0")]
 #[rustc_macro_transparency = "semitransparent"]
 #[allow_internal_unstable(unsafe_pin_internals)]
 pub macro pin($value:expr $(,)?) {

library/core/src/task/wake.rs

@@ -174,7 +174,7 @@ impl RawWakerVTable {
 /// Currently, `Context` only serves to provide access to a [`&Waker`](Waker)
 /// which can be used to wake the current task.
 #[stable(feature = "futures_api", since = "1.36.0")]
-#[cfg_attr(not(bootstrap), lang = "Context")]
+#[lang = "Context"]
 pub struct Context<'a> {
     waker: &'a Waker,
     // Ensure we future-proof against variance changes by forcing

library/std/src/path.rs

@@ -271,7 +271,7 @@ pub const MAIN_SEPARATOR: char = crate::sys::path::MAIN_SEP;
 /// The primary separator of path components for the current platform.
 ///
 /// For example, `/` on Unix and `\` on Windows.
-#[stable(feature = "main_separator_str", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "main_separator_str", since = "1.68.0")]
 pub const MAIN_SEPARATOR_STR: &str = crate::sys::path::MAIN_SEP_STR;
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -1778,7 +1778,7 @@ impl ops::Deref for PathBuf {
     }
 }
 
-#[stable(feature = "path_buf_deref_mut", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "path_buf_deref_mut", since = "1.68.0")]
 impl ops::DerefMut for PathBuf {
     #[inline]
     fn deref_mut(&mut self) -> &mut Path {

src/bootstrap/download.rs

@@ -318,15 +318,27 @@ impl Config {
         let channel = format!("{version}-{date}");
 
         let host = self.build;
-        let rustfmt_path = self.initial_rustc.with_file_name(exe("rustfmt", host));
-        let bin_root = self.out.join(host.triple).join("stage0");
+        let bin_root = self.out.join(host.triple).join("rustfmt");
+        let rustfmt_path = bin_root.join("bin").join(exe("rustfmt", host));
         let rustfmt_stamp = bin_root.join(".rustfmt-stamp");
         if rustfmt_path.exists() && !program_out_of_date(&rustfmt_stamp, &channel) {
             return Some(rustfmt_path);
         }
 
-        let filename = format!("rustfmt-{version}-{build}.tar.xz", build = host.triple);
-        self.download_component(DownloadSource::Dist, filename, "rustfmt-preview", &date, "stage0");
+        self.download_component(
+            DownloadSource::Dist,
+            format!("rustfmt-{version}-{build}.tar.xz", build = host.triple),
+            "rustfmt-preview",
+            &date,
+            "rustfmt",
+        );
+        self.download_component(
+            DownloadSource::Dist,
+            format!("rustc-{version}-{build}.tar.xz", build = host.triple),
+            "rustc",
+            &date,
+            "rustfmt",
+        );
 
         self.fix_bin_or_dylib(&bin_root.join("bin").join("rustfmt"));
         self.fix_bin_or_dylib(&bin_root.join("bin").join("cargo-fmt"));