Auto merge of #68625 - JohnTitor:rollup-20pfcru, r=JohnTitor

Rollup of 8 pull requests

Successful merges:

 - #68289 (Don't ICE on path-collision in dep-graph)
 - #68378 (Add BTreeMap::remove_entry)
 - #68553 (Fix run button positionning in case of scrolling)
 - #68556 (rustdoc: Fix re-exporting primitive types)
 - #68582 (Add E0727 long explanation)
 - #68592 (fix: typo in vec.rs)
 - #68619 (Fix a few spelling mistakes)
 - #68620 (Update links to WASI docs in time.rs module)

Failed merges:

r? @ghost

src/liballoc/collections/btree/map.rs

@@ -806,13 +806,42 @@ impl<K: Ord, V> BTreeMap<K, V> {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     pub fn remove<Q: ?Sized>(&mut self, key: &Q) -> Option<V>
+    where
+        K: Borrow<Q>,
+        Q: Ord,
+    {
+        self.remove_entry(key).map(|(_, v)| v)
+    }
+
+    /// Removes a key from the map, returning the stored key and value if the key
+    /// was previously in the map.
+    ///
+    /// The key may be any borrowed form of the map's key type, but the ordering
+    /// on the borrowed form *must* match the ordering on the key type.
+    ///
+    /// # Examples
+    ///
+    /// Basic usage:
+    ///
+    /// ```
+    /// #![feature(btreemap_remove_entry)]
+    /// use std::collections::BTreeMap;
+    ///
+    /// let mut map = BTreeMap::new();
+    /// map.insert(1, "a");
+    /// assert_eq!(map.remove_entry(&1), Some((1, "a")));
+    /// assert_eq!(map.remove_entry(&1), None);
+    /// ```
+    #[unstable(feature = "btreemap_remove_entry", issue = "66714")]
+    pub fn remove_entry<Q: ?Sized>(&mut self, key: &Q) -> Option<(K, V)>
     where
         K: Borrow<Q>,
         Q: Ord,
     {
         match search::search_tree(self.root.as_mut(), key) {
             Found(handle) => Some(
-                OccupiedEntry { handle, length: &mut self.length, _marker: PhantomData }.remove(),
+                OccupiedEntry { handle, length: &mut self.length, _marker: PhantomData }
+                    .remove_entry(),
             ),
             GoDown(_) => None,
         }

src/liballoc/vec.rs

@@ -176,7 +176,7 @@ use crate::raw_vec::RawVec;
 /// ```
 ///
 /// In Rust, it's more common to pass slices as arguments rather than vectors
-/// when you just want to provide a read access. The same goes for [`String`] and
+/// when you just want to provide read access. The same goes for [`String`] and
 /// [`&str`].
 ///
 /// # Capacity and reallocation

src/librustc/dep_graph/graph.rs

@@ -6,6 +6,7 @@ use rustc_data_structures::sharded::{self, Sharded};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_data_structures::sync::{AtomicU32, AtomicU64, Lock, Lrc, Ordering};
 use rustc_errors::Diagnostic;
+use rustc_hir::def_id::DefId;
 use rustc_index::vec::{Idx, IndexVec};
 use smallvec::SmallVec;
 use std::collections::hash_map::Entry;
@@ -677,18 +678,33 @@ impl DepGraph {
                     } else {
                         match dep_dep_node.kind {
                             DepKind::Hir | DepKind::HirBody | DepKind::CrateMetadata => {
-                                if dep_dep_node.extract_def_id(tcx).is_none() {
+                                if let Some(def_id) = dep_dep_node.extract_def_id(tcx) {
+                                    if def_id_corresponds_to_hir_dep_node(tcx, def_id) {
+                                        // The `DefPath` has corresponding node,
+                                        // and that node should have been marked
+                                        // either red or green in `data.colors`.
+                                        bug!(
+                                            "DepNode {:?} should have been \
+                                             pre-marked as red or green but wasn't.",
+                                            dep_dep_node
+                                        );
+                                    } else {
+                                        // This `DefPath` does not have a
+                                        // corresponding `DepNode` (e.g. a
+                                        // struct field), and the ` DefPath`
+                                        // collided with the `DefPath` of a
+                                        // proper item that existed in the
+                                        // previous compilation session.
+                                        //
+                                        // Since the given `DefPath` does not
+                                        // denote the item that previously
+                                        // existed, we just fail to mark green.
+                                        return None;
+                                    }
+                                } else {
                                     // If the node does not exist anymore, we
                                     // just fail to mark green.
                                     return None;
-                                } else {
-                                    // If the node does exist, it should have
-                                    // been pre-allocated.
-                                    bug!(
-                                        "DepNode {:?} should have been \
-                                          pre-allocated but wasn't.",
-                                        dep_dep_node
-                                    )
                                 }
                             }
                             _ => {
@@ -899,6 +915,11 @@ impl DepGraph {
     }
 }
 
+fn def_id_corresponds_to_hir_dep_node(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
+    let hir_id = tcx.hir().as_local_hir_id(def_id).unwrap();
+    def_id.index == hir_id.owner
+}
+
 /// A "work product" is an intermediate result that we save into the
 /// incremental directory for later re-use. The primary example are
 /// the object files that we save for each partition at code

src/librustc/mir/traversal.rs

@@ -4,7 +4,7 @@ use super::*;
 
 /// Preorder traversal of a graph.
 ///
-/// Preorder traversal is when each node is visited before an of it's
+/// Preorder traversal is when each node is visited before any of its
 /// successors
 ///
 /// ```text
@@ -82,7 +82,7 @@ impl<'a, 'tcx> Iterator for Preorder<'a, 'tcx> {
 
 /// Postorder traversal of a graph.
 ///
-/// Postorder traversal is when each node is visited after all of it's
+/// Postorder traversal is when each node is visited after all of its
 /// successors, except when the successor is only reachable by a back-edge
 ///
 ///

src/librustc_error_codes/error_codes.rs

@@ -397,6 +397,7 @@ E0718: include_str!("./error_codes/E0718.md"),
 E0720: include_str!("./error_codes/E0720.md"),
 E0723: include_str!("./error_codes/E0723.md"),
 E0725: include_str!("./error_codes/E0725.md"),
+E0727: include_str!("./error_codes/E0727.md"),
 E0728: include_str!("./error_codes/E0728.md"),
 E0729: include_str!("./error_codes/E0729.md"),
 E0730: include_str!("./error_codes/E0730.md"),
@@ -607,6 +608,5 @@ E0746: include_str!("./error_codes/E0746.md"),
     E0722, // Malformed `#[optimize]` attribute
     E0724, // `#[ffi_returns_twice]` is only allowed in foreign functions
     E0726, // non-explicit (not `'_`) elided lifetime in unsupported position
-    E0727, // `async` generators are not yet supported
     E0739, // invalid track_caller application/syntax
 }

src/librustc_error_codes/error_codes/E0727.md

@@ -0,0 +1,26 @@
+A `yield` clause was used in an `async` context.
+
+Example of erroneous code:
+
+```compile_fail
+#![feature(generators)]
+
+let generator = || {
+    async {
+        yield;
+    }
+};
+```
+
+Here, the `yield` keyword is used in an `async` block,
+which is not yet supported.
+
+To fix this error, you have to move `yield` out of the `async` block:
+
+```
+#![feature(generators)]
+
+let generator = || {
+    yield;
+};
+```

src/librustdoc/clean/inline.rs

@@ -445,12 +445,41 @@ fn build_module(cx: &DocContext<'_>, did: DefId, visited: &mut FxHashSet<DefId>)
         // two namespaces, so the target may be listed twice. Make sure we only
         // visit each node at most once.
         for &item in cx.tcx.item_children(did).iter() {
-            let def_id = item.res.def_id();
             if item.vis == ty::Visibility::Public {
-                if did == def_id || !visited.insert(def_id) {
+                if let Some(def_id) = item.res.mod_def_id() {
-                    continue;
+                    if did == def_id || !visited.insert(def_id) {
+                        continue;
+                    }
                 }
-                if let Some(i) = try_inline(cx, item.res, item.ident.name, None, visited) {
+                if let Res::PrimTy(p) = item.res {
+                    // Primitive types can't be inlined so generate an import instead.
+                    items.push(clean::Item {
+                        name: None,
+                        attrs: clean::Attributes::default(),
+                        source: clean::Span::empty(),
+                        def_id: cx.tcx.hir().local_def_id_from_node_id(ast::CRATE_NODE_ID),
+                        visibility: clean::Public,
+                        stability: None,
+                        deprecation: None,
+                        inner: clean::ImportItem(clean::Import::Simple(
+                            item.ident.to_string(),
+                            clean::ImportSource {
+                                path: clean::Path {
+                                    global: false,
+                                    res: item.res,
+                                    segments: vec![clean::PathSegment {
+                                        name: clean::PrimitiveType::from(p).as_str().to_string(),
+                                        args: clean::GenericArgs::AngleBracketed {
+                                            args: Vec::new(),
+                                            bindings: Vec::new(),
+                                        },
+                                    }],
+                                },
+                                did: None,
+                            },
+                        )),
+                    });
+                } else if let Some(i) = try_inline(cx, item.res, item.ident.name, None, visited) {
                     items.extend(i)
                 }
             }

src/librustdoc/clean/types.rs

@@ -1290,6 +1290,19 @@ impl From<ast::FloatTy> for PrimitiveType {
     }
 }
 
+impl From<hir::PrimTy> for PrimitiveType {
+    fn from(prim_ty: hir::PrimTy) -> PrimitiveType {
+        match prim_ty {
+            hir::PrimTy::Int(int_ty) => int_ty.into(),
+            hir::PrimTy::Uint(uint_ty) => uint_ty.into(),
+            hir::PrimTy::Float(float_ty) => float_ty.into(),
+            hir::PrimTy::Str => PrimitiveType::Str,
+            hir::PrimTy::Bool => PrimitiveType::Bool,
+            hir::PrimTy::Char => PrimitiveType::Char,
+        }
+    }
+}
+
 #[derive(Clone, PartialEq, Eq, Debug)]
 pub enum Visibility {
     Public,

src/librustdoc/clean/utils.rs

@@ -570,14 +570,7 @@ pub fn resolve_type(cx: &DocContext<'_>, path: Path, id: hir::HirId) -> Type {
     }
 
     let is_generic = match path.res {
-        Res::PrimTy(p) => match p {
+        Res::PrimTy(p) => return Primitive(PrimitiveType::from(p)),
-            hir::PrimTy::Str => return Primitive(PrimitiveType::Str),
-            hir::PrimTy::Bool => return Primitive(PrimitiveType::Bool),
-            hir::PrimTy::Char => return Primitive(PrimitiveType::Char),
-            hir::PrimTy::Int(int_ty) => return Primitive(int_ty.into()),
-            hir::PrimTy::Uint(uint_ty) => return Primitive(uint_ty.into()),
-            hir::PrimTy::Float(float_ty) => return Primitive(float_ty.into()),
-        },
         Res::SelfTy(..) if path.segments.len() == 1 => {
             return Generic(kw::SelfUpper.to_string());
         }

src/librustdoc/html/format.rs

@@ -1171,11 +1171,14 @@ impl clean::ImportSource {
         display_fn(move |f| match self.did {
             Some(did) => resolved_path(f, did, &self.path, true, false),
             _ => {
-                for (i, seg) in self.path.segments.iter().enumerate() {
+                for seg in &self.path.segments[..self.path.segments.len() - 1] {
-                    if i > 0 {
+                    write!(f, "{}::", seg.name)?;
-                        write!(f, "::")?
+                }
-                    }
+                let name = self.path.last_name();
-                    write!(f, "{}", seg.name)?;
+                if let hir::def::Res::PrimTy(p) = self.path.res {
+                    primitive_link(f, PrimitiveType::from(p), name)?;
+                } else {
+                    write!(f, "{}", name)?;
                 }
                 Ok(())
             }

src/librustdoc/html/highlight.rs

@@ -22,7 +22,7 @@ use syntax::token::{self, Token};
 pub fn render_with_highlighting(
     src: &str,
     class: Option<&str>,
-    extension: Option<&str>,
+    playground_button: Option<&str>,
     tooltip: Option<(&str, &str)>,
 ) -> String {
     debug!("highlighting: ================\n{}\n==============", src);
@@ -58,10 +58,7 @@ pub fn render_with_highlighting(
         Ok(highlighted_source) => {
             write_header(class, &mut out).unwrap();
             write!(out, "{}", highlighted_source).unwrap();
-            if let Some(extension) = extension {
+            write_footer(&mut out, playground_button).unwrap();
-                write!(out, "{}", extension).unwrap();
-            }
-            write_footer(&mut out).unwrap();
         }
         Err(()) => {
             // If errors are encountered while trying to highlight, just emit
@@ -433,6 +430,6 @@ fn write_header(class: Option<&str>, out: &mut dyn Write) -> io::Result<()> {
     write!(out, "<div class=\"example-wrap\"><pre class=\"rust {}\">\n", class.unwrap_or(""))
 }
 
-fn write_footer(out: &mut dyn Write) -> io::Result<()> {
+fn write_footer(out: &mut dyn Write, playground_button: Option<&str>) -> io::Result<()> {
-    write!(out, "</pre></div>\n")
+    write!(out, "</pre>{}</div>\n", if let Some(button) = playground_button { button } else { "" })
 }

src/librustdoc/html/static/rustdoc.css

@@ -136,7 +136,7 @@ summary {
 	outline: none;
 }
 
-code, pre {
+code, pre, a.test-arrow {
 	font-family: "Source Code Pro", monospace;
 }
 .docblock code, .docblock-short code {
@@ -305,6 +305,7 @@ nav.sub {
 .rustdoc:not(.source) .example-wrap {
 	display: inline-flex;
 	margin-bottom: 10px;
+	position: relative;
 }
 
 .example-wrap {
@@ -878,6 +879,7 @@ a.test-arrow {
 	font-size: 130%;
 	top: 5px;
 	right: 5px;
+	z-index: 1;
 }
 a.test-arrow:hover{
 	text-decoration: none;

src/libstd/time.rs

@@ -76,7 +76,7 @@ pub use core::time::Duration;
 /// [QueryPerformanceCounter]: https://docs.microsoft.com/en-us/windows/win32/api/profileapi/nf-profileapi-queryperformancecounter
 /// [`insecure_time` usercall]: https://edp.fortanix.com/docs/api/fortanix_sgx_abi/struct.Usercalls.html#method.insecure_time
 /// [timekeeping in SGX]: https://edp.fortanix.com/docs/concepts/rust-std/#codestdtimecode
-/// [__wasi_clock_time_get (Monotonic Clock)]: https://github.com/CraneStation/wasmtime/blob/master/docs/WASI-api.md#clock_time_get
+/// [__wasi_clock_time_get (Monotonic Clock)]: https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/docs.md#clock_time_get
 /// [clock_gettime (Monotonic Clock)]: https://linux.die.net/man/3/clock_gettime
 /// [mach_absolute_time]: https://developer.apple.com/library/archive/documentation/Darwin/Conceptual/KernelProgramming/services/services.html
 /// [clock_time_get (Monotonic Clock)]: https://nuxi.nl/cloudabi/#clock_time_get
@@ -157,7 +157,7 @@ pub struct Instant(time::Instant);
 /// [timekeeping in SGX]: https://edp.fortanix.com/docs/concepts/rust-std/#codestdtimecode
 /// [gettimeofday]: http://man7.org/linux/man-pages/man2/gettimeofday.2.html
 /// [clock_gettime (Realtime Clock)]: https://linux.die.net/man/3/clock_gettime
-/// [__wasi_clock_time_get (Realtime Clock)]: https://github.com/CraneStation/wasmtime/blob/master/docs/WASI-api.md#clock_time_get
+/// [__wasi_clock_time_get (Realtime Clock)]: https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/docs.md#clock_time_get
 /// [GetSystemTimeAsFileTime]: https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsystemtimeasfiletime
 ///
 /// **Disclaimer:** These system calls might change over time.

src/test/incremental/issue-62649-path-collisions-happen.rs

@@ -0,0 +1,13 @@
+// revisions: rpass1 rpass2
+
+#[cfg(rpass1)]
+pub trait Something {
+    fn foo();
+}
+
+#[cfg(rpass2)]
+pub struct Something {
+    pub foo: u8,
+}
+
+fn main() {}

src/test/rustdoc/auxiliary/primitive-reexport.rs

@@ -0,0 +1,8 @@
+// compile-flags: --emit metadata --crate-type lib --edition 2018
+
+#![crate_name = "foo"]
+
+pub mod bar {
+    pub use bool;
+    pub use char as my_char;
+}

src/test/rustdoc/primitive-reexport.rs

@@ -0,0 +1,28 @@
+// aux-build: primitive-reexport.rs
+// compile-flags:--extern foo --edition 2018
+
+#![crate_name = "bar"]
+
+// @has bar/p/index.html
+// @has - '//code' 'pub use bool;'
+// @has - '//code/a[@href="https://doc.rust-lang.org/nightly/std/primitive.bool.html"]' 'bool'
+// @has - '//code' 'pub use char as my_char;'
+// @has - '//code/a[@href="https://doc.rust-lang.org/nightly/std/primitive.char.html"]' 'char'
+pub mod p {
+    pub use foo::bar::*;
+}
+
+// @has bar/baz/index.html
+// @has - '//code' 'pub use bool;'
+// @has - '//code/a[@href="https://doc.rust-lang.org/nightly/std/primitive.bool.html"]' 'bool'
+// @has - '//code' 'pub use char as my_char;'
+// @has - '//code/a[@href="https://doc.rust-lang.org/nightly/std/primitive.char.html"]' 'char'
+pub use foo::bar as baz;
+
+// @has bar/index.html
+// @has - '//code' 'pub use str;'
+// @has - '//code/a[@href="https://doc.rust-lang.org/nightly/std/primitive.str.html"]' 'str'
+// @has - '//code' 'pub use i32 as my_i32;'
+// @has - '//code/a[@href="https://doc.rust-lang.org/nightly/std/primitive.i32.html"]' 'i32'
+pub use str;
+pub use i32 as my_i32;