Auto merge of #59949 - Centril:rollup-lsiqq1g, r=Centril

Rollup of 16 pull requests

Successful merges:

 - #59675 (Stabilize the `alloc` crate.)
 - #59708 (Mark variables captured by reference as mutable correctly)
 - #59735 (remove lookup_char_pos_adj)
 - #59747 (Copy book.toml unstable book generator)
 - #59796 (Retire `IsNotConst` naming)
 - #59804 (Clean up jobserver integration)
 - #59818 (Eliminate `FnBox` usages from libstd.)
 - #59830 (Fix links on keyword docs.)
 - #59835 (Re-export NonZero signed variant in std)
 - #59852 (std: Add `{read,write}_vectored` for more types)
 - #59855 (Fix attributes position in type declaration)
 - #59858 (Make duplicate matcher bindings a hard error)
 - #59899 (In `-Zprint-type-size` output, sort enum variants by size.)
 - #59912 (MaybeUninit: remove deprecated functions)
 - #59925 (Fix paste error in split_ascii_whitespace docs.)
 - #59930 (Exclude some copies of old book editions from search engines)

Failed merges:

r? @ghost

Author: bors

src/doc/robots.txt

@@ -17,3 +17,11 @@ Disallow: /1.0.0-beta.2/
 Disallow: /1.0.0-beta.3/
 Disallow: /1.0.0-beta.4/
 Disallow: /1.0.0-beta.5/
+Disallow: /book/first-edition/
+Disallow: /book/second-edition/
+Disallow: /stable/book/first-edition/
+Disallow: /stable/book/second-edition/
+Disallow: /beta/book/first-edition/
+Disallow: /beta/book/second-edition/
+Disallow: /nightly/book/first-edition/
+Disallow: /nightly/book/second-edition/

src/doc/unstable-book/book.toml

@@ -1,2 +1,3 @@
 [book]
 title = "The Rust Unstable Book"
+author = "The Rust Community"

src/liballoc/lib.rs

@@ -51,10 +51,7 @@
 //! default global allocator. It is not compatible with the libc allocator API.
 
 #![allow(unused_attributes)]
-#![unstable(feature = "alloc",
-            reason = "this library is unlikely to be stabilized in its current \
-                      form or name",
-            issue = "27783")]
+#![stable(feature = "alloc", since = "1.36.0")]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/",
        issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/",
        test(no_crate_inject, attr(allow(unused_variables), deny(warnings))))]

src/liballoc/prelude/mod.rs

@@ -5,7 +5,6 @@
 //!
 //! ```
 //! # #![allow(unused_imports)]
-//! # #![feature(alloc)]
 //! #![feature(alloc_prelude)]
 //! extern crate alloc;
 //! use alloc::prelude::v1::*;

src/liballoc/raw_vec.rs

@@ -256,7 +256,7 @@ impl<T, A: Alloc> RawVec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(alloc, raw_vec_internals)]
+    /// # #![feature(raw_vec_internals)]
     /// # extern crate alloc;
     /// # use std::ptr;
     /// # use alloc::raw_vec::RawVec;
@@ -460,7 +460,7 @@ impl<T, A: Alloc> RawVec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(alloc, raw_vec_internals)]
+    /// # #![feature(raw_vec_internals)]
     /// # extern crate alloc;
     /// # use std::ptr;
     /// # use alloc::raw_vec::RawVec;

src/libarena/lib.rs

@@ -14,7 +14,6 @@
 #![deny(rust_2018_idioms)]
 #![cfg_attr(not(stage0), deny(internal))]
 
-#![feature(alloc)]
 #![feature(core_intrinsics)]
 #![feature(dropck_eyepatch)]
 #![feature(raw_vec_internals)]

src/libcore/mem.rs

@@ -1152,15 +1152,6 @@ impl<T> MaybeUninit<T> {
         MaybeUninit { uninit: () }
     }
 
-    /// Deprecated before stabilization.
-    #[unstable(feature = "maybe_uninit", issue = "53491")]
-    #[inline(always)]
-    // FIXME: still used by stdsimd
-    // #[rustc_deprecated(since = "1.35.0", reason = "use `uninit` instead")]
-    pub const fn uninitialized() -> MaybeUninit<T> {
-        Self::uninit()
-    }
-
     /// Creates a new `MaybeUninit<T>` in an uninitialized state, with the memory being
     /// filled with `0` bytes. It depends on `T` whether that already makes for
     /// proper initialization. For example, `MaybeUninit<usize>::zeroed()` is initialized,
@@ -1221,14 +1212,6 @@ impl<T> MaybeUninit<T> {
         }
     }
 
-    /// Deprecated before stabilization.
-    #[unstable(feature = "maybe_uninit", issue = "53491")]
-    #[inline(always)]
-    #[rustc_deprecated(since = "1.35.0", reason = "use `write` instead")]
-    pub fn set(&mut self, val: T) -> &mut T {
-        self.write(val)
-    }
-
     /// Gets a pointer to the contained value. Reading from this pointer or turning it
     /// into a reference is undefined behavior unless the `MaybeUninit<T>` is initialized.
     ///
@@ -1346,15 +1329,6 @@ impl<T> MaybeUninit<T> {
         ManuallyDrop::into_inner(self.value)
     }
 
-    /// Deprecated before stabilization.
-    #[unstable(feature = "maybe_uninit", issue = "53491")]
-    #[inline(always)]
-    // FIXME: still used by stdsimd
-    // #[rustc_deprecated(since = "1.35.0", reason = "use `assume_init` instead")]
-    pub unsafe fn into_initialized(self) -> T {
-        self.assume_init()
-    }
-
     /// Reads the value from the `MaybeUninit<T>` container. The resulting `T` is subject
     /// to the usual drop handling.
     ///
@@ -1417,14 +1391,6 @@ impl<T> MaybeUninit<T> {
         self.as_ptr().read()
     }
 
-    /// Deprecated before stabilization.
-    #[unstable(feature = "maybe_uninit", issue = "53491")]
-    #[inline(always)]
-    #[rustc_deprecated(since = "1.35.0", reason = "use `read` instead")]
-    pub unsafe fn read_initialized(&self) -> T {
-        self.read()
-    }
-
     /// Gets a reference to the contained value.
     ///
     /// # Safety

src/libcore/str/mod.rs

@@ -2712,7 +2712,7 @@ impl str {
     /// All kinds of ASCII whitespace are considered:
     ///
     /// ```
-    /// let mut iter = " Mary   had\ta little  \n\t lamb".split_whitespace();
+    /// let mut iter = " Mary   had\ta little  \n\t lamb".split_ascii_whitespace();
     /// assert_eq!(Some("Mary"), iter.next());
     /// assert_eq!(Some("had"), iter.next());
     /// assert_eq!(Some("a"), iter.next());

src/libpanic_unwind/lib.rs

@@ -19,8 +19,6 @@
 
 #![deny(rust_2018_idioms)]
 
-#![feature(allocator_api)]
-#![feature(alloc)]
 #![feature(core_intrinsics)]
 #![feature(lang_items)]
 #![feature(libc)]

src/librustc/infer/error_reporting/mod.rs

@@ -278,7 +278,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
     }
 
     fn explain_span(self, heading: &str, span: Span) -> (String, Option<Span>) {
-        let lo = self.sess.source_map().lookup_char_pos_adj(span.lo());
+        let lo = self.sess.source_map().lookup_char_pos(span.lo());
         (
             format!("the {} at {}:{}", heading, lo.line, lo.col.to_usize() + 1),
             Some(span),