Auto merge of #61394 - pietroalbini:rollup-lzugnb4, r=pietroalbini

Rollup of 11 pull requests

Successful merges:

 - #60897 (error: remove StringError from Debug output)
 - #61304 (Speed up Azure CI installing Windows dependencies)
 - #61319 (Swap order of `unsafe async fn` to `async unsafe fn`)
 - #61342 (Set ellipsis_inclusive_range_patterns lint to warn)
 - #61344 (Add regression test for const generics ICE)
 - #61359 (Fix links in Deref documentation)
 - #61363 (Stabilize iter_nth_back feature)
 - #61369 (Fixed lifetime misspelling)
 - #61372 (Migrate some books to mdbook version 0.2)
 - #61374 (Explicitly suggest 'type_ascription' feature)
 - #61382 (Fixed a typo in core::convert::AsMut)

Failed merges:

r? @ghost

Author: bors

.azure-pipelines/steps/install-clang.yml

@@ -27,7 +27,7 @@ steps:
 # Original downloaded here came from
 # http://releases.llvm.org/7.0.0/LLVM-7.0.0-win64.exe
 - script: |
-    powershell -Command "iwr -outf %TEMP%\LLVM-7.0.0-win64.exe https://rust-lang-ci2.s3.amazonaws.com/rust-ci-mirror/LLVM-7.0.0-win64.exe"
+    powershell -Command "$ProgressPreference = 'SilentlyContinue'; iwr -outf %TEMP%\LLVM-7.0.0-win64.exe https://rust-lang-ci2.s3.amazonaws.com/rust-ci-mirror/LLVM-7.0.0-win64.exe"
     set CLANG_DIR=%CD%\citools\clang-rust
     %TEMP%\LLVM-7.0.0-win64.exe /S /NCRC /D=%CLANG_DIR%
     set RUST_CONFIGURE_ARGS=%RUST_CONFIGURE_ARGS% --set llvm.clang-cl=%CLANG_DIR%\bin\clang-cl.exe

.azure-pipelines/steps/install-sccache.yml

@@ -9,7 +9,7 @@ steps:
 
 - script: |
     md sccache
-    powershell -Command "iwr -outf sccache\sccache.exe https://rust-lang-ci2.s3.amazonaws.com/rust-ci-mirror/2018-04-26-sccache-x86_64-pc-windows-msvc"
+    powershell -Command "$ProgressPreference = 'SilentlyContinue'; iwr -outf sccache\sccache.exe https://rust-lang-ci2.s3.amazonaws.com/rust-ci-mirror/2018-04-26-sccache-x86_64-pc-windows-msvc"
     echo ##vso[task.prependpath]%CD%\sccache
   displayName: Install sccache (Windows)
   condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))

.azure-pipelines/steps/install-windows-build-deps.yml

@@ -54,9 +54,9 @@ steps:
 # Note that we don't literally overwrite the gdb.exe binary because it appears
 # to just use gdborig.exe, so that's the binary we deal with instead.
 - script: |
-    powershell -Command "iwr -outf %MINGW_ARCHIVE% %MINGW_URL%/%MINGW_ARCHIVE%"
+    powershell -Command "$ProgressPreference = 'SilentlyContinue'; iwr -outf %MINGW_ARCHIVE% %MINGW_URL%/%MINGW_ARCHIVE%"
     7z x -y %MINGW_ARCHIVE% > nul
-    powershell -Command "iwr -outf 2017-04-20-%MSYS_BITS%bit-gdborig.exe %MINGW_URL%/2017-04-20-%MSYS_BITS%bit-gdborig.exe"
+    powershell -Command "$ProgressPreference = 'SilentlyContinue'; iwr -outf 2017-04-20-%MSYS_BITS%bit-gdborig.exe %MINGW_URL%/2017-04-20-%MSYS_BITS%bit-gdborig.exe"
     mv 2017-04-20-%MSYS_BITS%bit-gdborig.exe %MINGW_DIR%\bin\gdborig.exe
     echo ##vso[task.prependpath]%CD%\%MINGW_DIR%\bin
   condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'), ne(variables['MINGW_URL'],''))
@@ -81,7 +81,7 @@ steps:
 # Note that this is originally from the github releases patch of Ninja
 - script: |
     md ninja
-    powershell -Command "iwr -outf 2017-03-15-ninja-win.zip https://rust-lang-ci2.s3.amazonaws.com/rust-ci-mirror/2017-03-15-ninja-win.zip"
+    powershell -Command "$ProgressPreference = 'SilentlyContinue'; iwr -outf 2017-03-15-ninja-win.zip https://rust-lang-ci2.s3.amazonaws.com/rust-ci-mirror/2017-03-15-ninja-win.zip"
     7z x -oninja 2017-03-15-ninja-win.zip
     del 2017-03-15-ninja-win.zip
     set RUST_CONFIGURE_ARGS=%RUST_CONFIGURE_ARGS% --enable-ninja

src/bootstrap/doc.rs

@@ -62,11 +62,11 @@ macro_rules! book {
 book!(
     EditionGuide, "src/doc/edition-guide", "edition-guide", RustbookVersion::MdBook2;
     EmbeddedBook, "src/doc/embedded-book", "embedded-book", RustbookVersion::MdBook2;
-    Nomicon, "src/doc/nomicon", "nomicon", RustbookVersion::MdBook1;
+    Nomicon, "src/doc/nomicon", "nomicon", RustbookVersion::MdBook2;
     Reference, "src/doc/reference", "reference", RustbookVersion::MdBook1;
     RustByExample, "src/doc/rust-by-example", "rust-by-example", RustbookVersion::MdBook1;
     RustcBook, "src/doc/rustc", "rustc", RustbookVersion::MdBook1;
-    RustdocBook, "src/doc/rustdoc", "rustdoc", RustbookVersion::MdBook1;
+    RustdocBook, "src/doc/rustdoc", "rustdoc", RustbookVersion::MdBook2;
 );
 
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
@@ -134,7 +134,7 @@ impl Step for UnstableBook {
             target: self.target,
             name: INTERNER.intern_str("unstable-book"),
             src: builder.md_doc_out(self.target),
-            version: RustbookVersion::MdBook1,
+            version: RustbookVersion::MdBook2,
         })
     }
 }

src/doc/rustdoc/src/command-line-arguments.md

@@ -178,7 +178,7 @@ $ rustdoc src/lib.rs --passes strip-priv-imports
 An argument of "list" will print a list of possible "rustdoc passes", and other
 arguments will be the name of which passes to run in addition to the defaults.
 
-For more details on passes, see [the chapter on them](passes.html).
+For more details on passes, see [the chapter on them](passes.md).
 
 See also `--no-defaults`.
 
@@ -194,7 +194,7 @@ By default, `rustdoc` will run several passes over your code. This
 removes those defaults, allowing you to use `--passes` to specify
 exactly which passes you want.
 
-For more details on passes, see [the chapter on them](passes.html).
+For more details on passes, see [the chapter on them](passes.md).
 
 See also `--passes`.
 
@@ -207,7 +207,7 @@ $ rustdoc src/lib.rs --test
 ```
 
 This flag will run your code examples as tests. For more, see [the chapter
-on documentation tests](documentation-tests.html).
+on documentation tests](documentation-tests.md).
 
 See also `--test-args`.
 
@@ -220,7 +220,7 @@ $ rustdoc src/lib.rs --test --test-args ignored
 ```
 
 This flag will pass options to the test runner when running documentation tests.
-For more, see [the chapter on documentation tests](documentation-tests.html).
+For more, see [the chapter on documentation tests](documentation-tests.md).
 
 See also `--test`.
 

src/doc/rustdoc/src/passes.md

@@ -5,8 +5,8 @@ Rustdoc has a concept called "passes". These are transformations that
 
 In addition to the passes below, check out the docs for these flags:
 
-* [`--passes`](command-line-arguments.html#a--passes-add-more-rustdoc-passes)
-* [`--no-defaults`](command-line-arguments.html#a--no-defaults-dont-run-default-passes)
+* [`--passes`](command-line-arguments.md#--passes-add-more-rustdoc-passes)
+* [`--no-defaults`](command-line-arguments.md#--no-defaults-dont-run-default-passes)
 
 ## Default passes
 

src/doc/unstable-book/src/language-features/asm.md

@@ -190,4 +190,4 @@ constraints, etc.
 [llvm-docs]: http://llvm.org/docs/LangRef.html#inline-assembler-expressions
 
 If you need more power and don't mind losing some of the niceties of
-`asm!`, check out [global_asm](language-features/global-asm.html).
+`asm!`, check out [global_asm](global-asm.md).

src/doc/unstable-book/src/language-features/box-patterns.md

@@ -4,7 +4,7 @@ The tracking issue for this feature is: [#29641]
 
 [#29641]: https://github.com/rust-lang/rust/issues/29641
 
-See also [`box_syntax`](language-features/box-syntax.html)
+See also [`box_syntax`](box-syntax.md)
 
 ------------------------
 

src/doc/unstable-book/src/language-features/box-syntax.md

@@ -4,7 +4,7 @@ The tracking issue for this feature is: [#49733]
 
 [#49733]: https://github.com/rust-lang/rust/issues/49733
 
-See also [`box_patterns`](language-features/box-patterns.html)
+See also [`box_patterns`](box-patterns.md)
 
 ------------------------
 

src/doc/unstable-book/src/language-features/global-asm.md

@@ -75,4 +75,4 @@ usages and placed the larger, single usage in the crate root.
 If you don't need quite as much power and flexibility as
 `global_asm!` provides, and you don't mind restricting your inline
 assembly to `fn` bodies only, you might try the
-[asm](language-features/asm.html) feature instead.
+[asm](asm.md) feature instead.

src/doc/unstable-book/src/language-features/lang-items.md

@@ -192,7 +192,7 @@ such as "```undefined reference to `__rust_probestack'```". Using this crate
 also requires enabling the library feature `compiler_builtins_lib`. You can read
 more about this [here][compiler-builtins-lib].
 
-[compiler-builtins-lib]: library-features/compiler-builtins-lib.html
+[compiler-builtins-lib]: ../library-features/compiler-builtins-lib.md
 
 ## More about the language items
 

src/doc/unstable-book/src/language-features/non-ascii-idents.md

@@ -45,4 +45,4 @@ that does _not_ occur in the set of [strict keywords].
 
 [`XID_start`]:  http://unicode.org/cldr/utility/list-unicodeset.jsp?a=%5B%3AXID_Start%3A%5D&abb=on&g=&i=
 [`XID_continue`]: http://unicode.org/cldr/utility/list-unicodeset.jsp?a=%5B%3AXID_Continue%3A%5D&abb=on&g=&i=
-[strict keywords]: ../reference/keywords.html#strict-keywords
+[strict keywords]: ../../reference/keywords.md#strict-keywords

src/doc/unstable-book/src/language-features/plugin-registrar.md

@@ -8,6 +8,6 @@ This feature is part of "compiler plugins." It will often be used with the
 [`plugin`] and `rustc_private` features as well. For more details, see
 their docs.
 
-[`plugin`]: language-features/plugin.html
+[`plugin`]: plugin.md
 
 ------------------------

src/doc/unstable-book/src/language-features/plugin.md

@@ -8,7 +8,7 @@ The tracking issue for this feature is: [#29597]
 This feature is part of "compiler plugins." It will often be used with the
 [`plugin_registrar`] and `rustc_private` features.
 
-[`plugin_registrar`]: language-features/plugin-registrar.html
+[`plugin_registrar`]: plugin-registrar.md
 
 ------------------------
 
@@ -39,7 +39,7 @@ of a library.
 
 Plugins can extend Rust's syntax in various ways. One kind of syntax extension
 is the procedural macro. These are invoked the same way as [ordinary
-macros](../book/macros.html), but the expansion is performed by arbitrary Rust
+macros](../../book/macros.md), but the expansion is performed by arbitrary Rust
 code that manipulates syntax trees at
 compile time.
 
@@ -130,7 +130,7 @@ The advantages over a simple `fn(&str) -> u32` are:
   a way to define new literal syntax for any data type.
 
 In addition to procedural macros, you can define new
-[`derive`](../reference/attributes/derive.html)-like attributes and other kinds
+[`derive`](../../reference/attributes/derive.md)-like attributes and other kinds
 of extensions.  See `Registry::register_syntax_extension` and the
 `SyntaxExtension` enum.  For a more involved macro example, see
 [`regex_macros`](https://github.com/rust-lang/regex/blob/master/regex_macros/src/lib.rs).
@@ -174,7 +174,7 @@ quasiquote as an ordinary plugin library.
 # Lint plugins
 
 Plugins can extend [Rust's lint
-infrastructure](../reference/attributes/diagnostics.html#lint-check-attributes) with
+infrastructure](../../reference/attributes/diagnostics.md#lint-check-attributes) with
 additional checks for code style, safety, etc. Now let's write a plugin
 [`lint_plugin_test.rs`](https://github.com/rust-lang/rust/blob/master/src/test/ui-fulldeps/auxiliary/lint_plugin_test.rs)
 that warns about any item named `lintme`.
@@ -253,7 +253,7 @@ mostly use the same infrastructure as lint plugins, and provide examples of how
 to access type information.
 
 Lints defined by plugins are controlled by the usual [attributes and compiler
-flags](../reference/attributes/diagnostics.html#lint-check-attributes), e.g.
+flags](../../reference/attributes/diagnostics.md#lint-check-attributes), e.g.
 `#[allow(test_lint)]` or `-A test-lint`. These identifiers are derived from the
 first argument to `declare_lint!`, with appropriate case and punctuation
 conversion.

src/doc/unstable-book/src/language-features/unboxed-closures.md

@@ -2,7 +2,7 @@
 
 The tracking issue for this feature is [#29625]
 
-See Also: [`fn_traits`](library-features/fn-traits.html)
+See Also: [`fn_traits`](../library-features/fn-traits.md)
 
 [#29625]: https://github.com/rust-lang/rust/issues/29625
 

src/doc/unstable-book/src/library-features/fn-traits.md

@@ -2,7 +2,7 @@
 
 The tracking issue for this feature is [#29625]
 
-See Also: [`unboxed_closures`](language-features/unboxed-closures.html)
+See Also: [`unboxed_closures`](../language-features/unboxed-closures.md)
 
 [#29625]: https://github.com/rust-lang/rust/issues/29625
 

src/doc/unstable-book/src/library-features/fnbox.md

@@ -27,6 +27,6 @@ impl<A, F> Fn for &F where F: Fn<A> + ?Sized {}
 
 Before the introduction of [`unsized_locals`][unsized_locals], we had been unable to provide the former impls. That means, unlike `&dyn Fn()` or `&mut dyn FnMut()` we could not use `Box<dyn FnOnce()>` at that time.
 
-[unsized_locals]: language-features/unsized-locals.html
+[unsized_locals]: ../language-features/unsized-locals.md
 
 `FnBox()` is an alternative approach to `Box<dyn FnBox()>` is delegated to `FnBox::call_box` which doesn't need unsized locals. As we now have `Box<dyn FnOnce()>` working, the `fnbox` feature is going to be removed.

src/doc/unstable-book/src/the-unstable-book.md

@@ -14,7 +14,7 @@ fn main() {
 
 The `box_syntax` feature [has a chapter][box] describing how to use it.
 
-[box]: language-features/box-syntax.html
+[box]: language-features/box-syntax.md
 
 Because this documentation relates to unstable features, we make no guarantees
 that what is contained here is accurate or up to date. It's developed on a

src/liballoc/lib.rs

@@ -112,7 +112,6 @@
 #![feature(maybe_uninit_extra, maybe_uninit_slice, maybe_uninit_array)]
 #![feature(alloc_layout_extra)]
 #![feature(try_trait)]
-#![feature(iter_nth_back)]
 
 // Allow testing this library
 

src/libcore/convert.rs

@@ -177,8 +177,8 @@ pub trait AsRef<T: ?Sized> {
 ///
 /// Using `AsMut` as trait bound for a generic function we can accept all mutable references
 /// that can be converted to type `&mut T`. Because [`Box<T>`] implements `AsMut<T>` we can
-/// write a function `add_one`that takes all arguments that can be converted to `&mut u64`.
-/// Because [`Box<T>`] implements `AsMut<T>` `add_one` accepts arguments of type
+/// write a function `add_one` that takes all arguments that can be converted to `&mut u64`.
+/// Because [`Box<T>`] implements `AsMut<T>`, `add_one` accepts arguments of type
 /// `&mut Box<u64>` as well:
 ///
 /// ```

src/libcore/iter/traits/double_ended.rs

@@ -88,15 +88,13 @@ pub trait DoubleEndedIterator: Iterator {
     /// Basic usage:
     ///
     /// ```
-    /// #![feature(iter_nth_back)]
     /// let a = [1, 2, 3];
     /// assert_eq!(a.iter().nth_back(2), Some(&1));
     /// ```
     ///
     /// Calling `nth_back()` multiple times doesn't rewind the iterator:
     ///
     /// ```
-    /// #![feature(iter_nth_back)]
     /// let a = [1, 2, 3];
     ///
     /// let mut iter = a.iter();
@@ -108,12 +106,11 @@ pub trait DoubleEndedIterator: Iterator {
     /// Returning `None` if there are less than `n + 1` elements:
     ///
     /// ```
-    /// #![feature(iter_nth_back)]
     /// let a = [1, 2, 3];
     /// assert_eq!(a.iter().nth_back(10), None);
     /// ```
     #[inline]
-    #[unstable(feature = "iter_nth_back", issue = "56995")]
+    #[stable(feature = "iter_nth_back", since = "1.37.0")]
     fn nth_back(&mut self, mut n: usize) -> Option<Self::Item> {
         for x in self.rev() {
             if n == 0 { return Some(x) }

src/libcore/ops/deref.rs

@@ -23,9 +23,9 @@
 /// * Values of type `&T` are coerced to values of type `&U`
 /// * `T` implicitly implements all the (immutable) methods of the type `U`.
 ///
-/// For more details, visit [the chapter in *The Rust Programming Language*]
-/// [book] as well as the reference sections on [the dereference operator]
-/// [ref-deref-op], [method resolution] and [type coercions].
+/// For more details, visit [the chapter in *The Rust Programming Language*][book]
+/// as well as the reference sections on [the dereference operator][ref-deref-op],
+/// [method resolution] and [type coercions].
 ///
 /// [book]: ../../book/ch15-02-deref.html
 /// [`DerefMut`]: trait.DerefMut.html
@@ -113,9 +113,9 @@ impl<T: ?Sized> Deref for &mut T {
 /// * Values of type `&mut T` are coerced to values of type `&mut U`
 /// * `T` implicitly implements all the (mutable) methods of the type `U`.
 ///
-/// For more details, visit [the chapter in *The Rust Programming Language*]
-/// [book] as well as the reference sections on [the dereference operator]
-/// [ref-deref-op], [method resolution] and [type coercions].
+/// For more details, visit [the chapter in *The Rust Programming Language*][book]
+/// as well as the reference sections on [the dereference operator][ref-deref-op],
+/// [method resolution] and [type coercions].
 ///
 /// [book]: ../../book/ch15-02-deref.html
 /// [`Deref`]: trait.Deref.html

src/libcore/tests/lib.rs

@@ -10,7 +10,6 @@
 #![feature(fmt_internals)]
 #![feature(hashmap_internals)]
 #![feature(is_sorted)]
-#![feature(iter_nth_back)]
 #![feature(iter_once_with)]
 #![feature(pattern)]
 #![feature(range_is_empty)]

src/librustc_codegen_ssa/README.md

@@ -26,7 +26,7 @@ While the LLVM-specific code will be left in `rustc_codegen_llvm`, all the new t
 
 @irinagpopa started to parametrize the types of `rustc_codegen_llvm` by a generic `Value` type, implemented in LLVM by a reference `&'ll Value`. This work has been extended to all structures inside the `mir` folder and elsewhere, as well as for LLVM's `BasicBlock` and `Type` types.
 
-The two most important structures for the LLVM codegen are `CodegenCx` and `Builder`. They are parametrized by multiple liftime parameters and the type for `Value`.
+The two most important structures for the LLVM codegen are `CodegenCx` and `Builder`. They are parametrized by multiple lifetime parameters and the type for `Value`.
 
 ```rust
 struct CodegenCx<'ll, 'tcx: 'll> {

src/librustc_lint/builtin.rs

@@ -1275,7 +1275,7 @@ declare_lint_pass!(
 
 declare_lint! {
     pub ELLIPSIS_INCLUSIVE_RANGE_PATTERNS,
-    Allow,
+    Warn,
     "`...` range patterns are deprecated"
 }
 

src/libstd/error.rs

@@ -314,7 +314,6 @@ impl From<String> for Box<dyn Error + Send + Sync> {
     ///     mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))
     /// ```
     fn from(err: String) -> Box<dyn Error + Send + Sync> {
-        #[derive(Debug)]
         struct StringError(String);
 
         impl Error for StringError {
@@ -327,6 +326,13 @@ impl From<String> for Box<dyn Error + Send + Sync> {
             }
         }
 
+        // Purposefully skip printing "StringError(..)"
+        impl Debug for StringError {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                Debug::fmt(&self.0, f)
+            }
+        }
+
         Box::new(StringError(err))
     }
 }

src/libsyntax/parse/diagnostics.rs

@@ -858,8 +858,8 @@ impl<'a> Parser<'a> {
                     Applicability::MaybeIncorrect,
                 );
             } else {
-                err.note("type ascription is a nightly-only feature that lets \
-                          you annotate an expression with a type: `<expr>: <type>`")
+                err.note("#![feature(type_ascription)] lets you annotate an \
+                          expression with a type: `<expr>: <type>`")
                     .span_note(
                         lhs_span,
                         "this expression expects an ascribed type after the colon",