Auto merge of rust-lang#80530 - m-ou-se:rollup-zit69ko, r=m-ou-se

Rollup of 9 pull requests

Successful merges:

 - rust-lang#78934 (refactor: removing library/alloc/src/vec/mod.rs ignore-tidy-filelength)
 - rust-lang#79479 (Add `Iterator::intersperse`)
 - rust-lang#80128 (Edit rustc_ast::ast::FieldPat docs)
 - rust-lang#80424 (Don't give an error when creating a file for the first time)
 - rust-lang#80458 (Some Promotion Refactoring)
 - rust-lang#80488 (Do not create dangling &T in Weak<T>::drop)
 - rust-lang#80491 (Miri: make size/align_of_val work for dangling raw ptrs)
 - rust-lang#80495 (Rename kw::Invalid -> kw::Empty)
 - rust-lang#80513 (Add regression test for rust-lang#80062)

Failed merges:

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

Author: bors

compiler/rustc_ast/src/ast.rs

@@ -630,16 +630,16 @@ impl Pat {
     }
 }
 
-/// A single field in a struct pattern
+/// A single field in a struct pattern.
 ///
-/// Patterns like the fields of Foo `{ x, ref y, ref mut z }`
-/// are treated the same as` x: x, y: ref y, z: ref mut z`,
-/// except is_shorthand is true
+/// Patterns like the fields of `Foo { x, ref y, ref mut z }`
+/// are treated the same as `x: x, y: ref y, z: ref mut z`,
+/// except when `is_shorthand` is true.
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub struct FieldPat {
-    /// The identifier for the field
+    /// The identifier for the field.
     pub ident: Ident,
-    /// The pattern the field is destructured to
+    /// The pattern the field is destructured to.
     pub pat: P<Pat>,
     pub is_shorthand: bool,
     pub attrs: AttrVec,

compiler/rustc_ast_lowering/src/lib.rs

@@ -1767,7 +1767,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         }
         self.arena.alloc_from_iter(inputs.iter().map(|param| match param.pat.kind {
             PatKind::Ident(_, ident, _) => ident,
-            _ => Ident::new(kw::Invalid, param.pat.span),
+            _ => Ident::new(kw::Empty, param.pat.span),
         }))
     }
 

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -184,7 +184,7 @@ impl<'a> AstValidator<'a> {
     }
 
     fn check_lifetime(&self, ident: Ident) {
-        let valid_names = [kw::UnderscoreLifetime, kw::StaticLifetime, kw::Invalid];
+        let valid_names = [kw::UnderscoreLifetime, kw::StaticLifetime, kw::Empty];
         if !valid_names.contains(&ident.name) && ident.without_first_quote().is_reserved() {
             self.err_handler().span_err(ident.span, "lifetimes cannot use keyword names");
         }

compiler/rustc_ast_pretty/src/pprust/state.rs

@@ -2787,7 +2787,7 @@ impl<'a> State<'a> {
                     self.print_explicit_self(&eself);
                 } else {
                     let invalid = if let PatKind::Ident(_, ident, _) = input.pat.kind {
-                        ident.name == kw::Invalid
+                        ident.name == kw::Empty
                     } else {
                         false
                     };