Auto merge of #82517 - Dylan-DPC:rollup-a1958gb, r=Dylan-DPC

Rollup of 16 pull requests

Successful merges:

 - #75807 (Convert core/num/mod.rs to intra-doc links)
 - #80534 (Use #[doc = include_str!()] in std)
 - #80553 (Add an impl of Error on `Arc<impl Error>`.)
 - #81167 (Make ptr::write const)
 - #81575 (rustdoc: Name fields of `ResolutionFailure::WrongNamespace`)
 - #81713 (Account for associated consts in the "unstable assoc item name colission" lint)
 - #82078 (Make char and u8 methods const)
 - #82087 (Fix ICE caused by suggestion with no code substitutions)
 - #82090 (Do not consider using a semicolon inside of a different-crate macro)
 - #82213 (Slices for vecs)
 - #82214 (Remove redundant to_string calls)
 - #82220 (fix the false 'defined here' messages)
 - #82313 (Update normalize.css to 8.0.1)
 - #82321 (AST: Remove some unnecessary boxes)
 - #82364 (Improve error msgs when found type is deref of expected)
 - #82514 (Update Clippy)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -565,14 +565,14 @@ dependencies = [
  "cargo_metadata 0.12.0",
  "clippy-mini-macro-test",
  "clippy_lints",
- "compiletest_rs",
+ "compiletest_rs 0.6.0",
  "derive-new",
  "rustc-workspace-hack",
  "rustc_tools_util 0.2.0",
  "semver 0.11.0",
  "serde",
  "tempfile",
- "tester",
+ "tester 0.9.0",
 ]
 
 [[package]]
@@ -584,6 +584,7 @@ name = "clippy_lints"
 version = "0.1.52"
 dependencies = [
  "cargo_metadata 0.12.0",
+ "clippy_utils",
  "if_chain",
  "itertools 0.9.0",
  "pulldown-cmark 0.8.0",
@@ -600,6 +601,20 @@ dependencies = [
  "url 2.1.1",
 ]
 
+[[package]]
+name = "clippy_utils"
+version = "0.1.52"
+dependencies = [
+ "if_chain",
+ "itertools 0.9.0",
+ "regex-syntax",
+ "rustc-semver",
+ "serde",
+ "smallvec 1.6.1",
+ "toml",
+ "unicode-normalization",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.1.0"
@@ -695,7 +710,30 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "tempfile",
- "tester",
+ "tester 0.7.0",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "compiletest_rs"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0086d6ad78cf409c3061618cd98e2789d5c9ce598fc9651611cf62eae0a599cb"
+dependencies = [
+ "diff",
+ "filetime",
+ "getopts",
+ "lazy_static",
+ "libc",
+ "log",
+ "miow 0.3.6",
+ "regex",
+ "rustfix",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tempfile",
+ "tester 0.9.0",
  "winapi 0.3.9",
 ]
 
@@ -984,14 +1022,35 @@ dependencies = [
  "dirs-sys",
 ]
 
+[[package]]
+name = "dirs-next"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b98cf8ebf19c3d1b223e151f99a4f9f0690dca41414773390fc824184ac833e1"
+dependencies = [
+ "cfg-if 1.0.0",
+ "dirs-sys-next",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e93d7f5705de3e49895a2b5e0b8855a1c27f080192ae9c32a6432d50741a57a"
 dependencies = [
  "libc",
- "redox_users",
+ "redox_users 0.3.4",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "dirs-sys-next"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
+dependencies = [
+ "libc",
+ "redox_users 0.4.0",
  "winapi 0.3.9",
 ]
 
@@ -1115,7 +1174,7 @@ checksum = "3ed85775dcc68644b5c950ac06a2b23768d3bc9390464151aaf27136998dcf9e"
 dependencies = [
  "cfg-if 0.1.10",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "winapi 0.3.9",
 ]
 
@@ -2226,7 +2285,7 @@ name = "miri"
 version = "0.1.0"
 dependencies = [
  "colored",
- "compiletest_rs",
+ "compiletest_rs 0.5.0",
  "env_logger 0.7.1",
  "getrandom 0.2.0",
  "hex 0.4.2",
@@ -2458,7 +2517,7 @@ dependencies = [
  "cloudabi",
  "instant",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "smallvec 1.6.1",
  "winapi 0.3.9",
 ]
@@ -2899,17 +2958,36 @@ version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
+[[package]]
+name = "redox_syscall"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94341e4e44e24f6b591b59e47a8a027df12e008d73fd5672dbea9cc22f4507d9"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09b23093265f8d200fa7b4c2c76297f47e681c655f6f1285a8780d6a022f7431"
 dependencies = [
  "getrandom 0.1.14",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "rust-argon2",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "528532f3d801c87aec9def2add9ca802fe569e44a544afe633765267840abe64"
+dependencies = [
+ "getrandom 0.2.0",
+ "redox_syscall 0.2.5",
+]
+
 [[package]]
 name = "regex"
 version = "1.4.3"
@@ -4535,6 +4613,12 @@ dependencies = [
  "unicode_categories",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb5d2a036dc6d2d8fd16fde3498b04306e29bd193bf306a57427019b823d5acd"
+
 [[package]]
 name = "ryu"
 version = "1.0.5"
@@ -4812,7 +4896,7 @@ checksum = "7fd8b795c389288baa5f355489c65e71fd48a02104600d15c4cfbc561e9e429d"
 dependencies = [
  "cfg-if 0.1.10",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "winapi 0.3.9",
 ]
 
@@ -4973,7 +5057,7 @@ checksum = "c8a4c1d0bee3230179544336c15eefb563cf0302955d962e456542323e8c2e8a"
 dependencies = [
  "filetime",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "xattr",
 ]
 
@@ -4986,7 +5070,7 @@ dependencies = [
  "cfg-if 0.1.10",
  "libc",
  "rand",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "remove_dir_all",
  "winapi 0.3.9",
 ]
@@ -5020,6 +5104,17 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "term"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c59df8ac95d96ff9bede18eb7300b0fda5e5d8d90960e76f8e14ae765eedbf1f"
+dependencies = [
+ "dirs-next",
+ "rustversion",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.0"
@@ -5065,6 +5160,19 @@ dependencies = [
  "term 0.6.1",
 ]
 
+[[package]]
+name = "tester"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0639d10d8f4615f223a57275cf40f9bdb7cfbb806bcb7f7cc56e3beb55a576eb"
+dependencies = [
+ "cfg-if 1.0.0",
+ "getopts",
+ "libc",
+ "num_cpus",
+ "term 0.7.0",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.11.0"

compiler/rustc_ast/src/ast.rs

@@ -2695,7 +2695,7 @@ pub enum ItemKind {
     /// A use declaration item (`use`).
     ///
     /// E.g., `use foo;`, `use foo::bar;` or `use foo::bar as FooBar;`.
-    Use(P<UseTree>),
+    Use(UseTree),
     /// A static item (`static`).
     ///
     /// E.g., `static FOO: i32 = 42;` or `static FOO: &'static str = "bar";`.
@@ -2719,7 +2719,7 @@ pub enum ItemKind {
     /// E.g., `extern {}` or `extern "C" {}`.
     ForeignMod(ForeignMod),
     /// Module-level inline assembly (from `global_asm!()`).
-    GlobalAsm(P<GlobalAsm>),
+    GlobalAsm(GlobalAsm),
     /// A type alias (`type`).
     ///
     /// E.g., `type Foo = Bar<u8>;`.

compiler/rustc_builtin_macros/src/global_asm.rs

@@ -28,7 +28,7 @@ pub fn expand_global_asm<'cx>(
             ident: Ident::invalid(),
             attrs: Vec::new(),
             id: ast::DUMMY_NODE_ID,
-            kind: ast::ItemKind::GlobalAsm(P(global_asm)),
+            kind: ast::ItemKind::GlobalAsm(global_asm),
             vis: ast::Visibility {
                 span: sp.shrink_to_lo(),
                 kind: ast::VisibilityKind::Inherited,

compiler/rustc_builtin_macros/src/standard_library_imports.rs

@@ -1,5 +1,4 @@
 use rustc_ast as ast;
-use rustc_ast::ptr::P;
 use rustc_expand::base::{ExtCtxt, ResolverExpand};
 use rustc_expand::expand::ExpansionConfig;
 use rustc_session::Session;
@@ -72,11 +71,11 @@ pub fn inject(
         span,
         Ident::invalid(),
         vec![cx.attribute(cx.meta_word(span, sym::prelude_import))],
-        ast::ItemKind::Use(P(ast::UseTree {
+        ast::ItemKind::Use(ast::UseTree {
             prefix: cx.path(span, import_path),
             kind: ast::UseTreeKind::Glob,
             span,
-        })),
+        }),
     );
 
     krate.items.insert(0, use_item);

compiler/rustc_codegen_llvm/src/allocator.rs

@@ -93,7 +93,7 @@ pub(crate) unsafe fn codegen(
     let args = [usize, usize]; // size, align
 
     let ty = llvm::LLVMFunctionType(void, args.as_ptr(), args.len() as c_uint, False);
-    let name = "__rust_alloc_error_handler".to_string();
+    let name = "__rust_alloc_error_handler";
     let llfn = llvm::LLVMRustGetOrInsertFunction(llmod, name.as_ptr().cast(), name.len(), ty);
     // -> ! DIFlagNoReturn
     llvm::Attribute::NoReturn.apply_llfn(llvm::AttributePlace::Function, llfn);

compiler/rustc_codegen_llvm/src/asm.rs

@@ -61,9 +61,9 @@ impl AsmBuilderMethods<'tcx> for Builder<'a, 'll, 'tcx> {
         // Default per-arch clobbers
         // Basically what clang does
         let arch_clobbers = match &self.sess().target.arch[..] {
-            "x86" | "x86_64" => vec!["~{dirflag}", "~{fpsr}", "~{flags}"],
-            "mips" | "mips64" => vec!["~{$1}"],
-            _ => Vec::new(),
+            "x86" | "x86_64" => &["~{dirflag}", "~{fpsr}", "~{flags}"][..],
+            "mips" | "mips64" => &["~{$1}"],
+            _ => &[],
         };
 
         let all_constraints = ia

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -181,16 +181,16 @@ fn get_linker(
             let original_path = tool.path();
             if let Some(ref root_lib_path) = original_path.ancestors().nth(4) {
                 let arch = match t.arch.as_str() {
-                    "x86_64" => Some("x64".to_string()),
-                    "x86" => Some("x86".to_string()),
-                    "aarch64" => Some("arm64".to_string()),
-                    "arm" => Some("arm".to_string()),
+                    "x86_64" => Some("x64"),
+                    "x86" => Some("x86"),
+                    "aarch64" => Some("arm64"),
+                    "arm" => Some("arm"),
                     _ => None,
                 };
                 if let Some(ref a) = arch {
                     // FIXME: Move this to `fn linker_with_args`.
                     let mut arg = OsString::from("/LIBPATH:");
-                    arg.push(format!("{}\\lib\\{}\\store", root_lib_path.display(), a.to_string()));
+                    arg.push(format!("{}\\lib\\{}\\store", root_lib_path.display(), a));
                     cmd.arg(&arg);
                 } else {
                     warn!("arch is not supported");

compiler/rustc_errors/src/diagnostic.rs

@@ -295,6 +295,7 @@ impl Diagnostic {
         suggestion: Vec<(Span, String)>,
         applicability: Applicability,
     ) -> &mut Self {
+        assert!(!suggestion.is_empty());
         self.suggestions.push(CodeSuggestion {
             substitutions: vec![Substitution {
                 parts: suggestion
@@ -318,6 +319,10 @@ impl Diagnostic {
         suggestions: Vec<Vec<(Span, String)>>,
         applicability: Applicability,
     ) -> &mut Self {
+        assert!(!suggestions.is_empty());
+        for s in &suggestions {
+            assert!(!s.is_empty());
+        }
         self.suggestions.push(CodeSuggestion {
             substitutions: suggestions
                 .into_iter()
@@ -348,6 +353,7 @@ impl Diagnostic {
         suggestion: Vec<(Span, String)>,
         applicability: Applicability,
     ) -> &mut Self {
+        assert!(!suggestion.is_empty());
         self.suggestions.push(CodeSuggestion {
             substitutions: vec![Substitution {
                 parts: suggestion

compiler/rustc_hir/src/hir.rs

@@ -1577,6 +1577,14 @@ impl Expr<'_> {
         expr
     }
 
+    pub fn peel_blocks(&self) -> &Self {
+        let mut expr = self;
+        while let ExprKind::Block(Block { expr: Some(inner), .. }, _) = &expr.kind {
+            expr = inner;
+        }
+        expr
+    }
+
     pub fn can_have_side_effects(&self) -> bool {
         match self.peel_drop_temps().kind {
             ExprKind::Path(_) | ExprKind::Lit(_) => false,