Auto merge of #69359 - Mark-Simulacrum:stable-next, r=<try>

[stable] 1.41.1 release

This backports the following PRs:
 * Revert "Remove `checked_add` in `Layout::repeat`" #69241
 * Do not ICE when encountering `yield` inside `async` block #69175
 * Correct ICE caused by macros generating invalid spans. #68611
 * Changelog: Demonstrate final build-override syntax #68603
 * Resolve long compile times when evaluating always valid constants #67667
 * Fix MIR typeck soundness holes #69145

This also includes a commit which rustfmt's files which the latter commits touched (and perhaps a bit more) to make rebasing the PRs go more smoothly (thankfully, this should be the last time we need to do so).

I have removed stable-nominated tags from PRs successfully backported.

RELEASES.md

@@ -1,3 +1,13 @@
+Version 1.41.1 (2020-02-27)
+===========================
+
+* [Always check types of static items][69145]
+* [Always check lifetime bounds of `Copy` impls][69145]
+* [Fix miscompilation in callers of `Layout::repeat`][69225]
+
+[69225]: https://github.com/rust-lang/rust/issues/69225
+[69145]: https://github.com/rust-lang/rust/pull/69145
+
 Version 1.41.0 (2020-01-30)
 ===========================
 
@@ -62,9 +72,9 @@ Cargo
 - [Cargo.lock now uses a more git friendly format that should help to reduce
   merge conflicts.][cargo/7579]
 - [You can now override specific dependencies's build settings][cargo/7591] E.g.
-  `[profile.dev.overrides.image] opt-level = 2` sets the `image` crate's
+  `[profile.dev.package.image] opt-level = 2` sets the `image` crate's
   optimisation level to `2` for debug builds. You can also use
-  `[profile.<profile>.build_overrides]` to override build scripts and
+  `[profile.<profile>.build-override]` to override build scripts and
   their dependencies.
 
 Misc
@@ -208,7 +218,7 @@ Compatibility Notes
 - [Using `#[inline]` on function prototypes and consts now emits a warning under
   `unused_attribute` lint.][65294] Using `#[inline]` anywhere else inside traits
   or `extern` blocks now correctly emits a hard error.
-  
+
 [65294]: https://github.com/rust-lang/rust/pull/65294/
 [66103]: https://github.com/rust-lang/rust/pull/66103/
 [65843]: https://github.com/rust-lang/rust/pull/65843/

src/bootstrap/channel.rs

@@ -13,7 +13,7 @@ use build_helper::output;
 use crate::Build;
 
 // The version number
-pub const CFG_RELEASE_NUM: &str = "1.41.0";
+pub const CFG_RELEASE_NUM: &str = "1.41.1";
 
 pub struct GitInfo {
     inner: Option<Info>,
@@ -29,31 +29,28 @@ impl GitInfo {
     pub fn new(ignore_git: bool, dir: &Path) -> GitInfo {
         // See if this even begins to look like a git dir
         if ignore_git || !dir.join(".git").exists() {
-            return GitInfo { inner: None }
+            return GitInfo { inner: None };
         }
 
         // Make sure git commands work
-        match Command::new("git")
-            .arg("rev-parse")
-            .current_dir(dir)
-            .output()
-        {
+        match Command::new("git").arg("rev-parse").current_dir(dir).output() {
             Ok(ref out) if out.status.success() => {}
             _ => return GitInfo { inner: None },
         }
 
         // Ok, let's scrape some info
-        let ver_date = output(Command::new("git").current_dir(dir)
-                                      .arg("log").arg("-1")
-                                      .arg("--date=short")
-                                      .arg("--pretty=format:%cd"));
-        let ver_hash = output(Command::new("git").current_dir(dir)
-                                      .arg("rev-parse").arg("HEAD"));
-        let short_ver_hash = output(Command::new("git")
-                                            .current_dir(dir)
-                                            .arg("rev-parse")
-                                            .arg("--short=9")
-                                            .arg("HEAD"));
+        let ver_date = output(
+            Command::new("git")
+                .current_dir(dir)
+                .arg("log")
+                .arg("-1")
+                .arg("--date=short")
+                .arg("--pretty=format:%cd"),
+        );
+        let ver_hash = output(Command::new("git").current_dir(dir).arg("rev-parse").arg("HEAD"));
+        let short_ver_hash = output(
+            Command::new("git").current_dir(dir).arg("rev-parse").arg("--short=9").arg("HEAD"),
+        );
         GitInfo {
             inner: Some(Info {
                 commit_date: ver_date.trim().to_string(),

src/libcore/alloc.rs

@@ -240,13 +240,14 @@ impl Layout {
     #[unstable(feature = "alloc_layout_extra", issue = "55724")]
     #[inline]
     pub fn repeat(&self, n: usize) -> Result<(Self, usize), LayoutErr> {
-        // This cannot overflow. Quoting from the invariant of Layout:
-        // > `size`, when rounded up to the nearest multiple of `align`,
-        // > must not overflow (i.e., the rounded value must be less than
-        // > `usize::MAX`)
-        let padded_size = self.size() + self.padding_needed_for(self.align());
-        let alloc_size = padded_size.checked_mul(n)
+        // Warning, removing the checked_add here led to segfaults in #67174. Further
+        // analysis in #69225 seems to indicate that this is an LTO-related
+        // miscompilation, so #67174 might be able to be reapplied in the future.
+        let padded_size = self
+            .size()
+            .checked_add(self.padding_needed_for(self.align()))
             .ok_or(LayoutErr { private: () })?;
+        let alloc_size = padded_size.checked_mul(n).ok_or(LayoutErr { private: () })?;
 
         unsafe {
             // self.align is already known to be valid and alloc_size has been

src/librustc/hir/map/blocks.rs

@@ -12,9 +12,9 @@
 //! for the `Code` associated with a particular NodeId.
 
 use crate::hir as ast;
+use crate::hir::intravisit::FnKind;
 use crate::hir::map;
 use crate::hir::{Expr, FnDecl, Node};
-use crate::hir::intravisit::FnKind;
 use syntax::ast::{Attribute, Ident};
 use syntax_pos::Span;
 
@@ -29,11 +29,15 @@ use syntax_pos::Span;
 ///
 /// To construct one, use the `Code::from_node` function.
 #[derive(Copy, Clone, Debug)]
-pub struct FnLikeNode<'a> { node: Node<'a> }
+pub struct FnLikeNode<'a> {
+    node: Node<'a>,
+}
 
 /// MaybeFnLike wraps a method that indicates if an object
 /// corresponds to some FnLikeNode.
-trait MaybeFnLike { fn is_fn_like(&self) -> bool; }
+trait MaybeFnLike {
+    fn is_fn_like(&self) -> bool;
+}
 
 impl MaybeFnLike for ast::Item {
     fn is_fn_like(&self) -> bool {
@@ -96,23 +100,23 @@ impl<'a> Code<'a> {
                 Code::from_node(map, map.get_parent_node(id))
             }
             map::Node::Expr(expr) => Some(Code::Expr(expr)),
-            node => FnLikeNode::from_node(node).map(Code::FnLike)
+            node => FnLikeNode::from_node(node).map(Code::FnLike),
         }
     }
 }
 
 /// These are all the components one can extract from a fn item for
 /// use when implementing FnLikeNode operations.
 struct ItemFnParts<'a> {
-    ident:    Ident,
-    decl:     &'a ast::FnDecl,
-    header:   ast::FnHeader,
-    vis:      &'a ast::Visibility,
+    ident: Ident,
+    decl: &'a ast::FnDecl,
+    header: ast::FnHeader,
+    vis: &'a ast::Visibility,
     generics: &'a ast::Generics,
-    body:     ast::BodyId,
-    id:       ast::HirId,
-    span:     Span,
-    attrs:    &'a [Attribute],
+    body: ast::BodyId,
+    id: ast::HirId,
+    span: Span,
+    attrs: &'a [Attribute],
 }
 
 /// These are all the components one can extract from a closure expr
@@ -127,13 +131,7 @@ struct ClosureParts<'a> {
 
 impl<'a> ClosureParts<'a> {
     fn new(d: &'a FnDecl, b: ast::BodyId, id: ast::HirId, s: Span, attrs: &'a [Attribute]) -> Self {
-        ClosureParts {
-            decl: d,
-            body: b,
-            id,
-            span: s,
-            attrs,
-        }
+        ClosureParts { decl: d, body: b, id, span: s, attrs }
     }
 }
 
@@ -145,33 +143,41 @@ impl<'a> FnLikeNode<'a> {
             map::Node::TraitItem(tm) => tm.is_fn_like(),
             map::Node::ImplItem(it) => it.is_fn_like(),
             map::Node::Expr(e) => e.is_fn_like(),
-            _ => false
+            _ => false,
         };
         fn_like.then_some(FnLikeNode { node })
     }
 
     pub fn body(self) -> ast::BodyId {
-        self.handle(|i: ItemFnParts<'a>| i.body,
-                    |_, _, _: &'a ast::FnSig, _, body: ast::BodyId, _, _| body,
-                    |c: ClosureParts<'a>| c.body)
+        self.handle(
+            |i: ItemFnParts<'a>| i.body,
+            |_, _, _: &'a ast::FnSig, _, body: ast::BodyId, _, _| body,
+            |c: ClosureParts<'a>| c.body,
+        )
     }
 
     pub fn decl(self) -> &'a FnDecl {
-        self.handle(|i: ItemFnParts<'a>| &*i.decl,
-                    |_, _, sig: &'a ast::FnSig, _, _, _, _| &sig.decl,
-                    |c: ClosureParts<'a>| c.decl)
+        self.handle(
+            |i: ItemFnParts<'a>| &*i.decl,
+            |_, _, sig: &'a ast::FnSig, _, _, _, _| &sig.decl,
+            |c: ClosureParts<'a>| c.decl,
+        )
     }
 
     pub fn span(self) -> Span {
-        self.handle(|i: ItemFnParts<'_>| i.span,
-                    |_, _, _: &'a ast::FnSig, _, _, span, _| span,
-                    |c: ClosureParts<'_>| c.span)
+        self.handle(
+            |i: ItemFnParts<'_>| i.span,
+            |_, _, _: &'a ast::FnSig, _, _, span, _| span,
+            |c: ClosureParts<'_>| c.span,
+        )
     }
 
     pub fn id(self) -> ast::HirId {
-        self.handle(|i: ItemFnParts<'_>| i.id,
-                    |id, _, _: &'a ast::FnSig, _, _, _, _| id,
-                    |c: ClosureParts<'_>| c.id)
+        self.handle(
+            |i: ItemFnParts<'_>| i.id,
+            |id, _, _: &'a ast::FnSig, _, _, _, _| id,
+            |c: ClosureParts<'_>| c.id,
+        )
     }
 
     pub fn constness(self) -> ast::Constness {
@@ -190,41 +196,40 @@ impl<'a> FnLikeNode<'a> {
         let item = |p: ItemFnParts<'a>| -> FnKind<'a> {
             FnKind::ItemFn(p.ident, p.generics, p.header, p.vis, p.attrs)
         };
-        let closure = |c: ClosureParts<'a>| {
-            FnKind::Closure(c.attrs)
-        };
+        let closure = |c: ClosureParts<'a>| FnKind::Closure(c.attrs);
         let method = |_, ident: Ident, sig: &'a ast::FnSig, vis, _, _, attrs| {
             FnKind::Method(ident, sig, vis, attrs)
         };
         self.handle(item, method, closure)
     }
 
-    fn handle<A, I, M, C>(self, item_fn: I, method: M, closure: C) -> A where
+    fn handle<A, I, M, C>(self, item_fn: I, method: M, closure: C) -> A
+    where
         I: FnOnce(ItemFnParts<'a>) -> A,
-        M: FnOnce(ast::HirId,
-                  Ident,
-                  &'a ast::FnSig,
-                  Option<&'a ast::Visibility>,
-                  ast::BodyId,
-                  Span,
-                  &'a [Attribute])
-                  -> A,
+        M: FnOnce(
+            ast::HirId,
+            Ident,
+            &'a ast::FnSig,
+            Option<&'a ast::Visibility>,
+            ast::BodyId,
+            Span,
+            &'a [Attribute],
+        ) -> A,
         C: FnOnce(ClosureParts<'a>) -> A,
     {
         match self.node {
             map::Node::Item(i) => match i.kind {
-                ast::ItemKind::Fn(ref sig, ref generics, block) =>
-                    item_fn(ItemFnParts {
-                        id: i.hir_id,
-                        ident: i.ident,
-                        decl: &sig.decl,
-                        body: block,
-                        vis: &i.vis,
-                        span: i.span,
-                        attrs: &i.attrs,
-                        header: sig.header,
-                        generics,
-                    }),
+                ast::ItemKind::Fn(ref sig, ref generics, block) => item_fn(ItemFnParts {
+                    id: i.hir_id,
+                    ident: i.ident,
+                    decl: &sig.decl,
+                    body: block,
+                    vis: &i.vis,
+                    span: i.span,
+                    attrs: &i.attrs,
+                    header: sig.header,
+                    generics,
+                }),
                 _ => bug!("item FnLikeNode that is not fn-like"),
             },
             map::Node::TraitItem(ti) => match ti.kind {
@@ -233,17 +238,16 @@ impl<'a> FnLikeNode<'a> {
                 }
                 _ => bug!("trait method FnLikeNode that is not fn-like"),
             },
-            map::Node::ImplItem(ii) => {
-                match ii.kind {
-                    ast::ImplItemKind::Method(ref sig, body) => {
-                        method(ii.hir_id, ii.ident, sig, Some(&ii.vis), body, ii.span, &ii.attrs)
-                    }
-                    _ => bug!("impl method FnLikeNode that is not fn-like")
+            map::Node::ImplItem(ii) => match ii.kind {
+                ast::ImplItemKind::Method(ref sig, body) => {
+                    method(ii.hir_id, ii.ident, sig, Some(&ii.vis), body, ii.span, &ii.attrs)
                 }
+                _ => bug!("impl method FnLikeNode that is not fn-like"),
             },
             map::Node::Expr(e) => match e.kind {
-                ast::ExprKind::Closure(_, ref decl, block, _fn_decl_span, _gen) =>
-                    closure(ClosureParts::new(&decl, block, e.hir_id, e.span, &e.attrs)),
+                ast::ExprKind::Closure(_, ref decl, block, _fn_decl_span, _gen) => {
+                    closure(ClosureParts::new(&decl, block, e.hir_id, e.span, &e.attrs))
+                }
                 _ => bug!("expr FnLikeNode that is not fn-like"),
             },
             _ => bug!("other FnLikeNode that is not fn-like"),