Auto merge of #67402 - Mark-Simulacrum:stage0-step, r=alexcrichton

Switch bootstrap to 1.41

This updates the version number for master to 1.42 and switches the bootstrap compiler to yesterday's beta. Fallout of cfg(bootstrap) changes is also dealt with.

Author: bors

src/bootstrap/channel.rs

@@ -13,7 +13,7 @@ use build_helper::output;
 use crate::Build;
 
 // The version number
-pub const CFG_RELEASE_NUM: &str = "1.41.0";
+pub const CFG_RELEASE_NUM: &str = "1.42.0";
 
 pub struct GitInfo {
     inner: Option<Info>,

src/liballoc/collections/linked_list.rs

@@ -275,10 +275,7 @@ impl<T> LinkedList<T> {
     /// let list: LinkedList<u32> = LinkedList::new();
     /// ```
     #[inline]
-    #[cfg_attr(
-        not(bootstrap),
-        rustc_const_stable(feature = "const_linked_list_new", since = "1.32.0"),
-    )]
+    #[rustc_const_stable(feature = "const_linked_list_new", since = "1.32.0")]
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const fn new() -> Self {
         LinkedList {

src/liballoc/lib.rs

@@ -116,8 +116,6 @@
 #![feature(unsize)]
 #![feature(unsized_locals)]
 #![feature(allocator_internals)]
-#![cfg_attr(bootstrap, feature(on_unimplemented))]
-#![cfg_attr(bootstrap, feature(rustc_const_unstable))]
 #![feature(slice_partition_dedup)]
 #![feature(maybe_uninit_extra, maybe_uninit_slice)]
 #![feature(alloc_layout_extra)]

src/liballoc/string.rs

@@ -367,10 +367,7 @@ impl String {
     /// let s = String::new();
     /// ```
     #[inline]
-    #[cfg_attr(
-        not(bootstrap),
-        rustc_const_stable(feature = "const_string_new", since = "1.32.0"),
-    )]
+    #[rustc_const_stable(feature = "const_string_new", since = "1.32.0")]
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const fn new() -> String {
         String { vec: Vec::new() }

src/liballoc/vec.rs

@@ -315,10 +315,7 @@ impl<T> Vec<T> {
     /// let mut vec: Vec<i32> = Vec::new();
     /// ```
     #[inline]
-    #[cfg_attr(
-        not(bootstrap),
-        rustc_const_stable(feature = "const_vec_new", since = "1.32.0"),
-    )]
+    #[rustc_const_stable(feature = "const_vec_new", since = "1.32.0")]
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const fn new() -> Vec<T> {
         Vec {

src/libcore/alloc.rs

@@ -100,7 +100,7 @@ impl Layout {
     /// This function is unsafe as it does not verify the preconditions from
     /// [`Layout::from_size_align`](#method.from_size_align).
     #[stable(feature = "alloc_layout", since = "1.28.0")]
-    #[cfg_attr(not(bootstrap), rustc_const_stable(feature = "alloc_layout", since = "1.28.0"))]
+    #[rustc_const_stable(feature = "alloc_layout", since = "1.28.0")]
     #[inline]
     pub const unsafe fn from_size_align_unchecked(size: usize, align: usize) -> Self {
         Layout { size_: size, align_: NonZeroUsize::new_unchecked(align) }

src/libcore/any.rs

@@ -423,14 +423,9 @@ impl TypeId {
     /// assert_eq!(is_string(&"cookie monster".to_string()), true);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature="const_type_id"))]
-    #[cfg_attr(not(bootstrap), rustc_const_unstable(feature="const_type_id", issue = "41875"))]
+    #[rustc_const_unstable(feature="const_type_id", issue = "41875")]
     pub const fn of<T: ?Sized + 'static>() -> TypeId {
         TypeId {
-            #[cfg(bootstrap)]
-            // SAFETY: going away soon
-            t: unsafe { intrinsics::type_id::<T>() },
-            #[cfg(not(bootstrap))]
             t: intrinsics::type_id::<T>(),
         }
     }
@@ -462,8 +457,7 @@ impl TypeId {
 /// );
 /// ```
 #[stable(feature = "type_name", since = "1.38.0")]
-#[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_type_name"))]
-#[cfg_attr(not(bootstrap), rustc_const_unstable(feature = "const_type_name", issue = "63084"))]
+#[rustc_const_unstable(feature = "const_type_name", issue = "63084")]
 pub const fn type_name<T: ?Sized>() -> &'static str {
     intrinsics::type_name::<T>()
 }
@@ -501,8 +495,7 @@ pub const fn type_name<T: ?Sized>() -> &'static str {
 /// println!("{}", type_name_of_val(&y));
 /// ```
 #[unstable(feature = "type_name_of_val", issue = "66359")]
-#[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_type_name"))]
-#[cfg_attr(not(bootstrap), rustc_const_unstable(feature = "const_type_name", issue = "63084"))]
+#[rustc_const_unstable(feature = "const_type_name", issue = "63084")]
 pub const fn type_name_of_val<T: ?Sized>(val: &T) -> &'static str {
     let _ = val;
     type_name::<T>()

src/libcore/cell.rs

@@ -324,7 +324,7 @@ impl<T> Cell<T> {
     /// let c = Cell::new(5);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(not(bootstrap), rustc_const_stable(feature = "const_cell_new", since = "1.32.0"))]
+    #[rustc_const_stable(feature = "const_cell_new", since = "1.32.0")]
     #[inline]
     pub const fn new(value: T) -> Cell<T> {
         Cell {
@@ -470,7 +470,7 @@ impl<T: ?Sized> Cell<T> {
     /// ```
     #[inline]
     #[stable(feature = "cell_as_ptr", since = "1.12.0")]
-    #[cfg_attr(not(bootstrap), rustc_const_stable(feature = "const_cell_as_ptr", since = "1.32.0"))]
+    #[rustc_const_stable(feature = "const_cell_as_ptr", since = "1.32.0")]
     pub const fn as_ptr(&self) -> *mut T {
         self.value.get()
     }
@@ -651,7 +651,7 @@ impl<T> RefCell<T> {
     /// let c = RefCell::new(5);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(not(bootstrap), rustc_const_stable(feature = "const_refcell_new", since = "1.32.0"))]
+    #[rustc_const_stable(feature = "const_refcell_new", since = "1.32.0")]
     #[inline]
     pub const fn new(value: T) -> RefCell<T> {
         RefCell {
@@ -1504,10 +1504,7 @@ impl<T> UnsafeCell<T> {
     /// let uc = UnsafeCell::new(5);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(
-        not(bootstrap),
-        rustc_const_stable(feature = "const_unsafe_cell_new", since = "1.32.0"),
-    )]
+    #[rustc_const_stable(feature = "const_unsafe_cell_new", since = "1.32.0")]
     #[inline]
     pub const fn new(value: T) -> UnsafeCell<T> {
         UnsafeCell { value }
@@ -1550,10 +1547,7 @@ impl<T: ?Sized> UnsafeCell<T> {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(
-        not(bootstrap),
-        rustc_const_stable(feature = "const_unsafecell_get", since = "1.32.0"),
-    )]
+    #[rustc_const_stable(feature = "const_unsafecell_get", since = "1.32.0")]
     pub const fn get(&self) -> *mut T {
         // We can just cast the pointer from `UnsafeCell<T>` to `T` because of
         // #[repr(transparent)]. This exploits libstd's special status, there is

src/libcore/char/methods.rs

@@ -911,10 +911,7 @@ impl char {
     /// assert!(!non_ascii.is_ascii());
     /// ```
     #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
-    #[cfg_attr(
-        not(bootstrap),
-        rustc_const_stable(feature = "const_ascii_methods_on_intrinsics", since = "1.32.0"),
-    )]
+    #[rustc_const_stable(feature = "const_ascii_methods_on_intrinsics", since = "1.32.0")]
     #[inline]
     pub const fn is_ascii(&self) -> bool {
         *self as u32 <= 0x7F

src/libcore/convert/mod.rs

@@ -101,7 +101,7 @@ pub use num::FloatToInt;
 /// assert_eq!(vec![1, 3], filtered);
 /// ```
 #[stable(feature = "convert_id", since = "1.33.0")]
-#[cfg_attr(not(bootstrap), rustc_const_stable(feature = "const_identity", since = "1.33.0"))]
+#[rustc_const_stable(feature = "const_identity", since = "1.33.0")]
 #[inline]
 pub const fn identity<T>(x: T) -> T {
     x