Auto merge of rust-lang#97214 - Mark-Simulacrum:stage0-bump, r=pietroalbini

Finish bumping stage0

It looks like the last time had left some remaining cfg's -- which made me think
that the stage0 bump was actually successful. This brings us to a released 1.62
beta though.

This now brings us to cfg-clean, with the exception of check-cfg-features in bootstrap;
I'd prefer to leave that for a separate PR at this time since it's likely to be more tricky.

cc rust-lang#97147 (comment)

r? `@pietroalbini`

Author: bors

compiler/rustc_codegen_gcc/src/intrinsic/simd.rs

@@ -13,6 +13,7 @@ use crate::builder::Builder;
 
 pub fn generic_simd_intrinsic<'a, 'gcc, 'tcx>(bx: &mut Builder<'a, 'gcc, 'tcx>, name: Symbol, callee_ty: Ty<'tcx>, args: &[OperandRef<'tcx, RValue<'gcc>>], ret_ty: Ty<'tcx>, llret_ty: Type<'gcc>, span: Span) -> Result<RValue<'gcc>, ()> {
     // macros for error handling:
+    #[allow(unused_macro_rules)]
     macro_rules! emit_error {
         ($msg: tt) => {
             emit_error!($msg, )

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -816,7 +816,7 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
     span: Span,
 ) -> Result<&'ll Value, ()> {
     // macros for error handling:
-    #[cfg_attr(not(bootstrap), allow(unused_macro_rules))]
+    #[allow(unused_macro_rules)]
     macro_rules! emit_error {
         ($msg: tt) => {
             emit_error!($msg, )
@@ -1145,7 +1145,7 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         span: Span,
         args: &[OperandRef<'tcx, &'ll Value>],
     ) -> Result<&'ll Value, ()> {
-        #[cfg_attr(not(bootstrap), allow(unused_macro_rules))]
+        #[allow(unused_macro_rules)]
         macro_rules! emit_error {
             ($msg: tt) => {
                 emit_error!($msg, )

compiler/rustc_feature/src/lib.rs

@@ -11,7 +11,6 @@
 //! even if it is stabilized or removed, *do not remove it*. Instead, move the
 //! symbol to the `accepted` or `removed` modules respectively.
 
-#![cfg_attr(bootstrap, feature(derive_default_enum))]
 #![feature(once_cell)]
 
 mod accepted;

compiler/rustc_infer/src/lib.rs

@@ -16,7 +16,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
-#![cfg_attr(bootstrap, feature(derive_default_enum))]
 #![feature(extend_one)]
 #![feature(label_break_value)]
 #![feature(let_chains)]

compiler/rustc_middle/src/lib.rs

@@ -29,7 +29,6 @@
 #![feature(backtrace)]
 #![feature(box_patterns)]
 #![feature(core_intrinsics)]
-#![cfg_attr(bootstrap, feature(derive_default_enum))]
 #![feature(discriminant_kind)]
 #![feature(exhaustive_patterns)]
 #![feature(get_mut_unchecked)]

compiler/rustc_middle/src/mir/visit.rs

@@ -258,7 +258,7 @@ macro_rules! make_mir_visitor {
                 // for best performance, we want to use an iterator rather
                 // than a for-loop, to avoid calling `body::Body::invalidate` for
                 // each basic block.
-                #[cfg_attr(not(bootstrap), allow(unused_macro_rules))]
+                #[allow(unused_macro_rules)]
                 macro_rules! basic_blocks {
                     (mut) => (body.basic_blocks_mut().iter_enumerated_mut());
                     () => (body.basic_blocks().iter_enumerated());
@@ -280,7 +280,7 @@ macro_rules! make_mir_visitor {
                     self.visit_local_decl(local, & $($mutability)? body.local_decls[local]);
                 }
 
-                #[cfg_attr(not(bootstrap), allow(unused_macro_rules))]
+                #[allow(unused_macro_rules)]
                 macro_rules! type_annotations {
                     (mut) => (body.user_type_annotations.iter_enumerated_mut());
                     () => (body.user_type_annotations.iter_enumerated());
@@ -933,7 +933,7 @@ macro_rules! make_mir_visitor {
                 body: &$($mutability)? Body<'tcx>,
                 location: Location
             ) {
-                #[cfg_attr(not(bootstrap), allow(unused_macro_rules))]
+                #[allow(unused_macro_rules)]
                 macro_rules! basic_blocks {
                     (mut) => (body.basic_blocks_mut());
                     () => (body.basic_blocks());

compiler/rustc_session/src/lib.rs

@@ -1,6 +1,5 @@
 #![feature(if_let_guard)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(derive_default_enum))]
 #![feature(let_else)]
 #![feature(min_specialization)]
 #![feature(never_type)]

compiler/rustc_trait_selection/src/lib.rs

@@ -14,7 +14,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
-#![cfg_attr(bootstrap, feature(derive_default_enum))]
 #![feature(drain_filter)]
 #![feature(hash_drain_filter)]
 #![feature(label_break_value)]

library/alloc/src/ffi/c_str.rs

@@ -1053,84 +1053,6 @@ impl AsRef<CStr> for CString {
     }
 }
 
-#[cfg(bootstrap)]
-#[doc(hidden)]
-#[unstable(feature = "cstr_internals", issue = "none")]
-pub trait CStrExt {
-    /// Converts a `CStr` into a <code>[Cow]<[str]></code>.
-    ///
-    /// If the contents of the `CStr` are valid UTF-8 data, this
-    /// function will return a <code>[Cow]::[Borrowed]\(&[str])</code>
-    /// with the corresponding <code>&[str]</code> slice. Otherwise, it will
-    /// replace any invalid UTF-8 sequences with
-    /// [`U+FFFD REPLACEMENT CHARACTER`][U+FFFD] and return a
-    /// <code>[Cow]::[Owned]\(&[str])</code> with the result.
-    ///
-    /// [str]: prim@str "str"
-    /// [Borrowed]: Cow::Borrowed
-    /// [Owned]: Cow::Owned
-    /// [U+FFFD]: crate::char::REPLACEMENT_CHARACTER "std::char::REPLACEMENT_CHARACTER"
-    ///
-    /// # Examples
-    ///
-    /// Calling `to_string_lossy` on a `CStr` containing valid UTF-8:
-    ///
-    /// ```
-    /// use std::borrow::Cow;
-    /// use std::ffi::CStr;
-    ///
-    /// let cstr = CStr::from_bytes_with_nul(b"Hello World\0")
-    ///                  .expect("CStr::from_bytes_with_nul failed");
-    /// assert_eq!(cstr.to_string_lossy(), Cow::Borrowed("Hello World"));
-    /// ```
-    ///
-    /// Calling `to_string_lossy` on a `CStr` containing invalid UTF-8:
-    ///
-    /// ```
-    /// use std::borrow::Cow;
-    /// use std::ffi::CStr;
-    ///
-    /// let cstr = CStr::from_bytes_with_nul(b"Hello \xF0\x90\x80World\0")
-    ///                  .expect("CStr::from_bytes_with_nul failed");
-    /// assert_eq!(
-    ///     cstr.to_string_lossy(),
-    ///     Cow::Owned(String::from("Hello �World")) as Cow<'_, str>
-    /// );
-    /// ```
-    #[must_use = "this returns the result of the operation, \
-                  without modifying the original"]
-    #[stable(feature = "cstr_to_str", since = "1.4.0")]
-    fn to_string_lossy(&self) -> Cow<'_, str>;
-
-    /// Converts a <code>[Box]<[CStr]></code> into a [`CString`] without copying or allocating.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use std::ffi::CString;
-    ///
-    /// let c_string = CString::new(b"foo".to_vec()).expect("CString::new failed");
-    /// let boxed = c_string.into_boxed_c_str();
-    /// assert_eq!(boxed.into_c_string(), CString::new("foo").expect("CString::new failed"));
-    /// ```
-    #[must_use = "`self` will be dropped if the result is not used"]
-    #[stable(feature = "into_boxed_c_str", since = "1.20.0")]
-    fn into_c_string(self: Box<Self>) -> CString;
-}
-
-#[cfg(bootstrap)]
-#[unstable(feature = "cstr_internals", issue = "none")]
-impl CStrExt for CStr {
-    fn to_string_lossy(&self) -> Cow<'_, str> {
-        String::from_utf8_lossy(self.to_bytes())
-    }
-
-    fn into_c_string(self: Box<Self>) -> CString {
-        CString::from(self)
-    }
-}
-
-#[cfg(not(bootstrap))]
 #[cfg(not(test))]
 impl CStr {
     /// Converts a `CStr` into a <code>[Cow]<[str]></code>.

library/alloc/src/ffi/mod.rs

@@ -80,9 +80,6 @@
 
 #![unstable(feature = "alloc_ffi", issue = "94079")]
 
-#[cfg(bootstrap)]
-#[unstable(feature = "cstr_internals", issue = "none")]
-pub use self::c_str::CStrExt;
 #[unstable(feature = "alloc_c_string", issue = "94079")]
 pub use self::c_str::FromVecWithNulError;
 #[unstable(feature = "alloc_c_string", issue = "94079")]