Auto merge of rust-lang#92329 - matthiaskrgr:rollup-l3b4fl1, r=matthi…

…askrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#90586 (Relax priv-in-pub lint on generic bounds and where clauses of trait impls.)
 - rust-lang#92112 (Fix the error of checking `base_expr` twice in type_changing_struct_update)
 - rust-lang#92147 (rustc_builtin_macros: make asm mod public for rustfmt)
 - rust-lang#92161 (resolve: Minor miscellaneous cleanups from rust-lang#89059)
 - rust-lang#92264 (Remove `maybe_uninit_extra` feature from Vec docs)
 - rust-lang#92303 (Add test cases for issue rust-lang#26186)
 - rust-lang#92307 (Fix minor typos)

Failed merges:

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

compiler/rustc_builtin_macros/src/asm.rs

@@ -809,7 +809,7 @@ fn expand_preparsed_asm(ecx: &mut ExtCtxt<'_>, args: AsmArgs) -> Option<ast::Inl
     })
 }
 
-pub fn expand_asm<'cx>(
+pub(super) fn expand_asm<'cx>(
     ecx: &'cx mut ExtCtxt<'_>,
     sp: Span,
     tts: TokenStream,
@@ -836,7 +836,7 @@ pub fn expand_asm<'cx>(
     }
 }
 
-pub fn expand_global_asm<'cx>(
+pub(super) fn expand_global_asm<'cx>(
     ecx: &'cx mut ExtCtxt<'_>,
     sp: Span,
     tts: TokenStream,

compiler/rustc_builtin_macros/src/lib.rs

@@ -19,7 +19,6 @@ use rustc_expand::base::{MacroExpanderFn, ResolverExpand, SyntaxExtensionKind};
 use rustc_expand::proc_macro::BangProcMacro;
 use rustc_span::symbol::sym;
 
-mod asm;
 mod assert;
 mod cfg;
 mod cfg_accessible;
@@ -42,6 +41,7 @@ mod test;
 mod trace_macros;
 mod util;
 
+pub mod asm;
 pub mod cmdline_attrs;
 pub mod proc_macro_harness;
 pub mod standard_library_imports;

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -415,16 +415,12 @@ impl CStore {
 
         let span = data.get_span(id.index, sess);
 
-        let attrs = data.get_item_attrs(id.index, sess).collect();
-
-        let ident = data.item_ident(id.index, sess);
-
         LoadedMacro::MacroDef(
             ast::Item {
-                ident,
+                ident: data.item_ident(id.index, sess),
                 id: ast::DUMMY_NODE_ID,
                 span,
-                attrs,
+                attrs: data.get_item_attrs(id.index, sess).collect(),
                 kind: ast::ItemKind::MacroDef(data.get_macro(id.index, sess)),
                 vis: ast::Visibility {
                     span: span.shrink_to_lo(),

compiler/rustc_privacy/src/lib.rs

@@ -2064,7 +2064,11 @@ impl<'tcx> Visitor<'tcx> for PrivateItemsInPublicInterfacesVisitor<'tcx> {
             // Subitems of trait impls have inherited publicity.
             hir::ItemKind::Impl(ref impl_) => {
                 let impl_vis = ty::Visibility::of_impl(item.def_id, tcx, &Default::default());
-                self.check(item.def_id, impl_vis).generics().predicates();
+                // check that private components do not appear in the generics or predicates of inherent impls
+                // this check is intentionally NOT performed for impls of traits, per #90586
+                if impl_.of_trait.is_none() {
+                    self.check(item.def_id, impl_vis).generics().predicates();
+                }
                 for impl_item_ref in impl_.items {
                     let impl_item_vis = if impl_.of_trait.is_none() {
                         min(tcx.visibility(impl_item_ref.id.def_id), impl_vis, tcx)

compiler/rustc_resolve/src/lib.rs

@@ -3419,27 +3419,21 @@ impl<'a> Resolver<'a> {
                     return v.clone();
                 }
 
-                let parse_attrs = || {
-                    let attrs = self.cstore().item_attrs(def_id, self.session);
-                    let attr =
-                        attrs.iter().find(|a| a.has_name(sym::rustc_legacy_const_generics))?;
-                    let mut ret = vec![];
-                    for meta in attr.meta_item_list()? {
-                        match meta.literal()?.kind {
-                            LitKind::Int(a, _) => {
-                                ret.push(a as usize);
-                            }
-                            _ => panic!("invalid arg index"),
-                        }
+                let attr = self
+                    .cstore()
+                    .item_attrs(def_id, self.session)
+                    .into_iter()
+                    .find(|a| a.has_name(sym::rustc_legacy_const_generics))?;
+                let mut ret = Vec::new();
+                for meta in attr.meta_item_list()? {
+                    match meta.literal()?.kind {
+                        LitKind::Int(a, _) => ret.push(a as usize),
+                        _ => panic!("invalid arg index"),
                     }
-                    Some(ret)
-                };
-
-                // Cache the lookup to avoid parsing attributes for an iterm
-                // multiple times.
-                let ret = parse_attrs();
-                self.legacy_const_generic_args.insert(def_id, ret.clone());
-                return ret;
+                }
+                // Cache the lookup to avoid parsing attributes for an iterm multiple times.
+                self.legacy_const_generic_args.insert(def_id, Some(ret.clone()));
+                return Some(ret);
             }
         }
         None

compiler/rustc_typeck/src/check/expr.rs

@@ -1508,7 +1508,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 }
             } else {
                 self.check_expr_has_type_or_error(base_expr, adt_ty, |_| {
-                    let base_ty = self.check_expr(base_expr);
+                    let base_ty = self.typeck_results.borrow().node_type(base_expr.hir_id);
                     let same_adt = match (adt_ty.kind(), base_ty.kind()) {
                         (ty::Adt(adt, _), ty::Adt(base_adt, _)) if adt == base_adt => true,
                         _ => false,

library/alloc/src/vec/mod.rs

@@ -2043,7 +2043,7 @@ impl<T, A: Allocator> Vec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(vec_spare_capacity, maybe_uninit_extra)]
+    /// #![feature(vec_spare_capacity)]
     ///
     /// // Allocate vector big enough for 10 elements.
     /// let mut v = Vec::with_capacity(10);
@@ -2102,7 +2102,7 @@ impl<T, A: Allocator> Vec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(vec_split_at_spare, maybe_uninit_extra)]
+    /// #![feature(vec_split_at_spare)]
     ///
     /// let mut v = vec![1, 1, 2];
     ///

library/std/src/io/readbuf.rs

@@ -52,7 +52,7 @@ impl<'a> ReadBuf<'a> {
 
     /// Creates a new `ReadBuf` from a fully uninitialized buffer.
     ///
-    /// Use `assume_init` if part of the buffer is known to be already inintialized.
+    /// Use `assume_init` if part of the buffer is known to be already initialized.
     #[inline]
     pub fn uninit(buf: &'a mut [MaybeUninit<u8>]) -> ReadBuf<'a> {
         ReadBuf { buf, filled: 0, initialized: 0 }
@@ -145,7 +145,7 @@ impl<'a> ReadBuf<'a> {
                 byte.write(0);
             }
 
-            // SAFETY: we just inintialized uninit bytes, and the previous bytes were already init
+            // SAFETY: we just initialized uninit bytes, and the previous bytes were already init
             unsafe {
                 self.assume_init(n);
             }

library/std/src/net/ip.rs

@@ -1826,7 +1826,7 @@ impl fmt::Display for Ipv6Addr {
                 }
             }
         } else {
-            // Slow path: write the address to a local buffer, the use f.pad.
+            // Slow path: write the address to a local buffer, then use f.pad.
             // Defined recursively by using the fast path to write to the
             // buffer.
 

src/test/ui/closures/2229_closure_analysis/wild_patterns.rs

@@ -3,7 +3,7 @@
 #![feature(rustc_attrs)]
 
 // Test to ensure that we can handle cases where
-// let statements create no bindings are intialized
+// let statements create no bindings are initialized
 // using a Place expression
 //
 // Note: Currently when feature `capture_disjoint_fields` is enabled

src/test/ui/const-generics/generic_const_exprs/eval-privacy.rs

@@ -9,12 +9,7 @@ pub trait Trait {
     fn assoc_fn() -> Self::AssocTy;
 }
 
-impl<const U: u8> Trait for Const<U>
-//~^ WARN private type
-//~| WARN this was previously
-//~| WARN private type
-//~| WARN this was previously
-
+impl<const U: u8> Trait for Const<U> // OK, trait impl predicates
 where
     Const<{ my_const_fn(U) }>: ,
 {

src/test/ui/const-generics/generic_const_exprs/eval-privacy.stderr

@@ -1,43 +1,12 @@
-warning: private type `fn(u8) -> u8 {my_const_fn}` in public interface (error E0446)
-  --> $DIR/eval-privacy.rs:12:1
-   |
-LL | / impl<const U: u8> Trait for Const<U>
-LL | |
-LL | |
-LL | |
-...  |
-LL | |     }
-LL | | }
-   | |_^
-   |
-   = note: `#[warn(private_in_public)]` on by default
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
-
-warning: private type `fn(u8) -> u8 {my_const_fn}` in public interface (error E0446)
-  --> $DIR/eval-privacy.rs:12:1
-   |
-LL | / impl<const U: u8> Trait for Const<U>
-LL | |
-LL | |
-LL | |
-...  |
-LL | |     }
-LL | | }
-   | |_^
-   |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
-
 error[E0446]: private type `fn(u8) -> u8 {my_const_fn}` in public interface
-  --> $DIR/eval-privacy.rs:21:5
+  --> $DIR/eval-privacy.rs:16:5
    |
 LL |     type AssocTy = Const<{ my_const_fn(U) }>;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't leak private type
 ...
 LL | const fn my_const_fn(val: u8) -> u8 {
    | ----------------------------------- `fn(u8) -> u8 {my_const_fn}` declared as private
 
-error: aborting due to previous error; 2 warnings emitted
+error: aborting due to previous error
 
 For more information about this error, try `rustc --explain E0446`.

src/test/ui/issues/issue-26186.rs

@@ -0,0 +1,62 @@
+// check-pass
+use std::sync::Mutex;
+use std::cell::RefCell;
+use std::rc::Rc;
+use std::ops::*;
+
+//eefriedman example
+struct S<'a, T:FnMut() + 'static + ?Sized>(&'a mut T);
+impl<'a, T:?Sized + FnMut() + 'static> DerefMut for S<'a, T> {
+    fn deref_mut(&mut self) -> &mut Self::Target { &mut self.0 }
+}
+impl<'a, T:?Sized + FnMut() + 'static> Deref for S<'a, T> {
+    type Target = dyn FnMut() + 'a;
+    fn deref(&self) -> &Self::Target { &self.0 }
+}
+
+//Ossipal example
+struct FunctionIcon {
+    get_icon: Mutex<Box<dyn FnMut() -> u32>>,
+}
+
+impl FunctionIcon {
+    fn get_icon(&self) -> impl '_ + std::ops::DerefMut<Target=Box<dyn FnMut() -> u32>> {
+        self.get_icon.lock().unwrap()
+    }
+
+    fn load_icon(&self)  {
+        let mut get_icon = self.get_icon();
+        let _rgba_icon = (*get_icon)();
+    }
+}
+
+//shepmaster example
+struct Foo;
+
+impl Deref for Foo {
+    type Target = dyn FnMut() + 'static;
+    fn deref(&self) -> &Self::Target {
+        unimplemented!()
+    }
+}
+
+impl DerefMut for Foo {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        unimplemented!()
+    }
+}
+
+fn main() {
+    //eefriedman example
+    let mut f = ||{};
+    let mut s = S(&mut f);
+    s();
+
+    //Diggsey/Mark-Simulacrum example
+    let a: Rc<RefCell<dyn FnMut()>> = Rc::new(RefCell::new(||{}));
+    a.borrow_mut()();
+
+    //shepmaster example
+    let mut t = Foo;
+    t();
+}

src/test/ui/privacy/private-in-public-warn.rs

@@ -63,8 +63,7 @@ mod traits {
     }
     impl<T: PrivTr> Pub<T> {} //~ ERROR private trait `traits::PrivTr` in public interface
         //~^ WARNING hard error
-    impl<T: PrivTr> PubTr for Pub<T> {} //~ ERROR private trait `traits::PrivTr` in public interface
-        //~^ WARNING hard error
+    impl<T: PrivTr> PubTr for Pub<T> {} // OK, trait impl predicates
 }
 
 mod traits_where {
@@ -87,9 +86,7 @@ mod traits_where {
     impl<T> Pub<T> where T: PrivTr {}
         //~^ ERROR private trait `traits_where::PrivTr` in public interface
         //~| WARNING hard error
-    impl<T> PubTr for Pub<T> where T: PrivTr {}
-        //~^ ERROR private trait `traits_where::PrivTr` in public interface
-        //~| WARNING hard error
+    impl<T> PubTr for Pub<T> where T: PrivTr {} // OK, trait impl predicates
 }
 
 mod generics {