Rollup of 14 pull requests

RELEASES.md

@@ -44,6 +44,7 @@ Stabilized APIs
 - [`Result::unwrap_unchecked`]
 - [`Result::unwrap_err_unchecked`]
 - [`NonZero{unsigned}::is_power_of_two`]
+- [`File::options`]
 
 These APIs are now usable in const contexts:
 
@@ -141,6 +142,7 @@ and related tools.
 [`Result::unwrap_unchecked`]: https://doc.rust-lang.org/stable/std/result/enum.Result.html#method.unwrap_unchecked
 [`Result::unwrap_err_unchecked`]: https://doc.rust-lang.org/stable/std/result/enum.Result.html#method.unwrap_err_unchecked
 [`NonZero{unsigned}::is_power_of_two`]: https://doc.rust-lang.org/stable/std/num/struct.NonZeroU8.html#method.is_power_of_two
+[`File::options`]: https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.options
 [`unix::process::ExitStatusExt::core_dumped`]: https://doc.rust-lang.org/stable/std/os/unix/process/trait.ExitStatusExt.html#tymethod.core_dumped
 [`unix::process::ExitStatusExt::stopped_signal`]: https://doc.rust-lang.org/stable/std/os/unix/process/trait.ExitStatusExt.html#tymethod.stopped_signal
 [`unix::process::ExitStatusExt::continued`]: https://doc.rust-lang.org/stable/std/os/unix/process/trait.ExitStatusExt.html#tymethod.continued
@@ -2588,6 +2590,11 @@ Language
 - [Visibility modifiers (e.g. `pub`) are now syntactically allowed on trait items and
   enum variants.][66183] These are still rejected semantically, but
   can be seen and parsed by procedural macros and conditional compilation.
+- [You can now define a Rust `extern "C"` function with `Box<T>` and use `T*` as the corresponding
+  type on the C side.][62514] Please see [the documentation][box-memory-layout] for more information,
+  including the important caveat about preferring to avoid `Box<T>` in Rust signatures for functions defined in C.
+
+[box-memory-layout]: https://doc.rust-lang.org/std/boxed/index.html#memory-layout
 
 Compiler
 --------
@@ -2662,6 +2669,7 @@ Compatibility Notes
 
 [54733]: https://github.com/rust-lang/rust/pull/54733/
 [61351]: https://github.com/rust-lang/rust/pull/61351/
+[62514]: https://github.com/rust-lang/rust/pull/62514/
 [67255]: https://github.com/rust-lang/rust/pull/67255/
 [66661]: https://github.com/rust-lang/rust/pull/66661/
 [66771]: https://github.com/rust-lang/rust/pull/66771/

compiler/rustc_builtin_macros/src/asm.rs

@@ -16,13 +16,13 @@ use rustc_target::asm::InlineAsmArch;
 use smallvec::smallvec;
 
 pub struct AsmArgs {
-    templates: Vec<P<ast::Expr>>,
-    operands: Vec<(ast::InlineAsmOperand, Span)>,
+    pub templates: Vec<P<ast::Expr>>,
+    pub operands: Vec<(ast::InlineAsmOperand, Span)>,
     named_args: FxHashMap<Symbol, usize>,
     reg_args: FxHashSet<usize>,
-    clobber_abis: Vec<(Symbol, Span)>,
+    pub clobber_abis: Vec<(Symbol, Span)>,
     options: ast::InlineAsmOptions,
-    options_spans: Vec<Span>,
+    pub options_spans: Vec<Span>,
 }
 
 fn parse_args<'a>(

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -810,7 +810,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
                         param_env,
                         Binder::dummy(TraitPredicate {
                             trait_ref,
-                            constness: ty::BoundConstness::ConstIfConst,
+                            constness: ty::BoundConstness::NotConst,
                             polarity: ty::ImplPolarity::Positive,
                         }),
                     );
@@ -829,6 +829,10 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
                             return;
                         }
                         Ok(Some(ImplSource::UserDefined(data))) => {
+                            if let hir::Constness::NotConst = tcx.impl_constness(data.impl_def_id) {
+                                self.check_op(ops::FnCallNonConst(None));
+                                return;
+                            }
                             let callee_name = tcx.item_name(callee);
                             if let Some(&did) = tcx
                                 .associated_item_def_ids(data.impl_def_id)

library/core/src/intrinsics.rs

@@ -961,7 +961,7 @@ extern "rust-intrinsic" {
     /// Below are common applications of `transmute` which can be replaced with safer
     /// constructs.
     ///
-    /// Turning raw bytes(`&[u8]`) to `u32`, `f64`, etc.:
+    /// Turning raw bytes (`&[u8]`) into `u32`, `f64`, etc.:
     ///
     /// ```
     /// let raw_bytes = [0x78, 0x56, 0x34, 0x12];

library/std/src/error.rs

@@ -606,21 +606,21 @@ impl Error for time::FromSecsError {}
 
 // Copied from `any.rs`.
 impl dyn Error + 'static {
-    /// Returns `true` if the boxed type is the same as `T`
+    /// Returns `true` if the inner type is the same as `T`.
     #[stable(feature = "error_downcast", since = "1.3.0")]
     #[inline]
     pub fn is<T: Error + 'static>(&self) -> bool {
         // Get `TypeId` of the type this function is instantiated with.
         let t = TypeId::of::<T>();
 
-        // Get `TypeId` of the type in the trait object.
-        let boxed = self.type_id(private::Internal);
+        // Get `TypeId` of the type in the trait object (`self`).
+        let concrete = self.type_id(private::Internal);
 
         // Compare both `TypeId`s on equality.
-        t == boxed
+        t == concrete
     }
 
-    /// Returns some reference to the boxed value if it is of type `T`, or
+    /// Returns some reference to the inner value if it is of type `T`, or
     /// `None` if it isn't.
     #[stable(feature = "error_downcast", since = "1.3.0")]
     #[inline]
@@ -632,7 +632,7 @@ impl dyn Error + 'static {
         }
     }
 
-    /// Returns some mutable reference to the boxed value if it is of type `T`, or
+    /// Returns some mutable reference to the inner value if it is of type `T`, or
     /// `None` if it isn't.
     #[stable(feature = "error_downcast", since = "1.3.0")]
     #[inline]

library/std/src/fs.rs

@@ -356,9 +356,10 @@ impl File {
     /// open or create a file with specific options if `open()` or `create()`
     /// are not appropriate.
     ///
-    /// It is equivalent to `OpenOptions::new()` but allows you to write more
-    /// readable code. Instead of `OpenOptions::new().read(true).open("foo.txt")`
-    /// you can write `File::options().read(true).open("foo.txt")`. This
+    /// It is equivalent to `OpenOptions::new()`, but allows you to write more
+    /// readable code. Instead of
+    /// `OpenOptions::new().append(true).open("example.log")`,
+    /// you can write `File::options().append(true).open("example.log")`. This
     /// also avoids the need to import `OpenOptions`.
     ///
     /// See the [`OpenOptions::new`] function for more details.
@@ -369,7 +370,7 @@ impl File {
     /// use std::fs::File;
     ///
     /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::options().read(true).open("foo.txt")?;
+    ///     let mut f = File::options().append(true).open("example.log")?;
     ///     Ok(())
     /// }
     /// ```

library/std/src/time.rs

@@ -54,7 +54,7 @@ pub use core::time::FromSecsError;
 /// instant when created, and are often useful for tasks such as measuring
 /// benchmarks or timing how long an operation takes.
 ///
-/// Note, however, that instants are not guaranteed to be **steady**. In other
+/// Note, however, that instants are **not** guaranteed to be **steady**. In other
 /// words, each tick of the underlying clock might not be the same length (e.g.
 /// some seconds may be longer than others). An instant may jump forwards or
 /// experience time dilation (slow down or speed up), but it will never go

src/ci/docker/scripts/musl-toolchain.sh

@@ -48,7 +48,9 @@ cd musl-cross-make
 git checkout a54eb56f33f255dfca60be045f12a5cfaf5a72a9
 
 # Fix the cfi detection script in musl's configure so cfi is generated
-# when debug info is asked for.
+# when debug info is asked for. This patch is derived from
+# https://git.musl-libc.org/cgit/musl/commit/?id=c4d4028dde90562f631edf559fbc42d8ec1b29de.
+# When we upgrade to a version that includes this commit, we can remove the patch.
 mkdir patches/musl-1.1.24
 cp ../musl-patch-configure.diff patches/musl-1.1.24/0001-fix-cfi-detection.diff
 

src/doc/rustdoc/src/documentation-tests.md

@@ -335,7 +335,8 @@ panic during execution. If the code doesn't panic, the test will fail.
 The `no_run` attribute will compile your code but not run it. This is
 important for examples such as "Here's how to retrieve a web page,"
 which you would want to ensure compiles, but might be run in a test
-environment that has no network access.
+environment that has no network access. This attribute can also be
+used to demonstrate code snippets that can cause Undefined Behavior.
 
 ```rust
 /// ```no_run

src/librustdoc/html/render/context.rs

@@ -665,7 +665,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
                 _ => unreachable!(),
             };
             let items = self.build_sidebar_items(module);
-            let js_dst = self.dst.join("sidebar-items.js");
+            let js_dst = self.dst.join(&format!("sidebar-items{}.js", self.shared.resource_suffix));
             let v = format!("initSidebarItems({});", serde_json::to_string(&items).unwrap());
             scx.fs.write(js_dst, v)?;
         }

src/librustdoc/html/render/mod.rs

@@ -1827,7 +1827,11 @@ fn print_sidebar(cx: &Context<'_>, it: &clean::Item, buffer: &mut Buffer) {
         ty = it.type_(),
         path = relpath
     );
-    write!(buffer, "<script defer src=\"{}sidebar-items.js\"></script>", relpath);
+    write!(
+        buffer,
+        "<script defer src=\"{}sidebar-items{}.js\"></script>",
+        relpath, cx.shared.resource_suffix
+    );
     // Closes sidebar-elems div.
     buffer.write_str("</div>");
 }

src/librustdoc/html/render/print_item.rs

@@ -1557,7 +1557,7 @@ fn render_union(
     }
 
     if it.has_stripped_fields().unwrap() {
-        write!(w, "    // some fields omitted\n{}", tab);
+        write!(w, "    /* private fields */\n{}", tab);
     }
     if toggle {
         toggle_close(w);
@@ -1613,13 +1613,11 @@ fn render_struct(
 
             if has_visible_fields {
                 if it.has_stripped_fields().unwrap() {
-                    write!(w, "\n{}    // some fields omitted", tab);
+                    write!(w, "\n{}    /* private fields */", tab);
                 }
                 write!(w, "\n{}", tab);
             } else if it.has_stripped_fields().unwrap() {
-                // If there are no visible fields we can just display
-                // `{ /* fields omitted */ }` to save space.
-                write!(w, " /* fields omitted */ ");
+                write!(w, " /* private fields */ ");
             }
             if toggle {
                 toggle_close(w);

src/librustdoc/html/static/css/themes/ayu.css

@@ -61,7 +61,7 @@ pre, .rustdoc.source .example-wrap {
 	background-color: #14191f;
 }
 
-.rust-logo > img {
+.rust-logo {
 	filter: drop-shadow(1px 0 0px #fff)
 		drop-shadow(0 1px 0 #fff)
 		drop-shadow(-1px 0 0 #fff)

src/librustdoc/html/static/css/themes/dark.css

@@ -32,7 +32,7 @@ pre, .rustdoc.source .example-wrap {
 	background-color: #505050;
 }
 
-.rust-logo > img {
+.rust-logo {
 	filter: drop-shadow(1px 0 0px #fff)
 		drop-shadow(0 1px 0 #fff)
 		drop-shadow(-1px 0 0 #fff)

src/librustdoc/html/static/css/themes/light.css

@@ -43,7 +43,7 @@ pre, .rustdoc.source .example-wrap {
 	scrollbar-color: rgba(36, 37, 39, 0.6) #d9d9d9;
 }
 
-.rust-logo > img {
+.rust-logo {
 	/* No need for a border in here! */
 }
 

src/test/rustdoc-gui/rust-logo.goml

@@ -0,0 +1,78 @@
+// This test ensures that the correct style is applied to the rust logo in the sidebar.
+goto: file://|DOC_PATH|/test_docs/index.html
+
+// First we start with the dark theme.
+local-storage: {
+    "rustdoc-theme": "dark",
+    "rustdoc-preferred-dark-theme": "dark",
+    "rustdoc-use-system-theme": "false",
+}
+reload:
+
+assert-css: (
+    ".rust-logo",
+    {"filter": "drop-shadow(rgb(255, 255, 255) 1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px 1px 0px) drop-shadow(rgb(255, 255, 255) -1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px -1px 0px)"},
+)
+
+// In the source view page now.
+goto: file://|DOC_PATH|/src/test_docs/lib.rs.html
+
+local-storage: {
+    "rustdoc-theme": "dark",
+    "rustdoc-preferred-dark-theme": "dark",
+    "rustdoc-use-system-theme": "false",
+}
+reload:
+
+assert-css: (
+    ".rust-logo",
+    {"filter": "drop-shadow(rgb(255, 255, 255) 1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px 1px 0px) drop-shadow(rgb(255, 255, 255) -1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px -1px 0px)"},
+)
+
+// Then with the ayu theme.
+local-storage: {
+    "rustdoc-theme": "ayu",
+    "rustdoc-preferred-dark-theme": "ayu",
+    "rustdoc-use-system-theme": "false",
+}
+reload:
+
+assert-css: (
+    ".rust-logo",
+    {"filter": "drop-shadow(rgb(255, 255, 255) 1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px 1px 0px) drop-shadow(rgb(255, 255, 255) -1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px -1px 0px)"},
+)
+
+// In the source view page now.
+goto: file://|DOC_PATH|/src/test_docs/lib.rs.html
+
+local-storage: {
+    "rustdoc-theme": "ayu",
+    "rustdoc-preferred-dark-theme": "ayu",
+    "rustdoc-use-system-theme": "false",
+}
+reload:
+
+assert-css: (
+    ".rust-logo",
+    {"filter": "drop-shadow(rgb(255, 255, 255) 1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px 1px 0px) drop-shadow(rgb(255, 255, 255) -1px 0px 0px) drop-shadow(rgb(255, 255, 255) 0px -1px 0px)"},
+)
+
+// And finally with the light theme.
+local-storage: {"rustdoc-theme": "light", "rustdoc-use-system-theme": "false"}
+reload:
+
+assert-css: (
+    ".rust-logo",
+    {"filter": "none"},
+)
+
+// In the source view page now.
+goto: file://|DOC_PATH|/src/test_docs/lib.rs.html
+
+local-storage: {"rustdoc-theme": "light", "rustdoc-use-system-theme": "false"}
+reload:
+
+assert-css: (
+    ".rust-logo",
+    {"filter": "none"},
+)

src/test/rustdoc/structfields.rs

@@ -2,7 +2,7 @@
 pub struct Foo {
     // @has - //pre "pub a: ()"
     pub a: (),
-    // @has - //pre "// some fields omitted"
+    // @has - //pre "/* private fields */"
     // @!has - //pre "b: ()"
     b: (),
     // @!has - //pre "c: usize"
@@ -16,7 +16,7 @@ pub struct Foo {
 pub struct Bar {
     // @has - //pre "pub a: ()"
     pub a: (),
-    // @!has - //pre "// some fields omitted"
+    // @!has - //pre "/* private fields */"
 }
 
 // @has structfields/enum.Qux.html
@@ -29,11 +29,11 @@ pub enum Qux {
         b: (),
         // @has - //pre "c: usize"
         c: usize,
-        // @has - //pre "// some fields omitted"
+        // @has - //pre "/* private fields */"
     },
 }
 
-// @has structfields/struct.Baz.html //pre "pub struct Baz { /* fields omitted */ }"
+// @has structfields/struct.Baz.html //pre "pub struct Baz { /* private fields */ }"
 pub struct Baz {
     x: u8,
     #[doc(hidden)]

src/test/rustdoc/toggle-item-contents.rs

@@ -55,7 +55,7 @@ pub union Union {
 
 // @has 'toggle_item_contents/struct.PrivStruct.html'
 // @count - '//details[@class="rustdoc-toggle type-contents-toggle"]' 0
-// @has - '//div[@class="docblock item-decl"]' 'fields omitted'
+// @has - '//div[@class="docblock item-decl"]' '/* private fields */'
 pub struct PrivStruct {
     a: usize,
     b: usize,

src/test/rustdoc/union.rs

@@ -2,7 +2,7 @@
 pub union U {
     // @has - //pre "pub a: u8"
     pub a: u8,
-    // @has - //pre "// some fields omitted"
+    // @has - //pre "/* private fields */"
     // @!has - //pre "b: u16"
     b: u16,
 }

src/test/ui/rfc-2632-const-trait-impl/default-method-body-is-const-same-trait-ck.rs

@@ -0,0 +1,17 @@
+#![feature(const_fn_trait_bound)]
+#![feature(const_trait_impl)]
+
+pub trait Tr {
+    #[default_method_body_is_const]
+    fn a(&self) {}
+
+    #[default_method_body_is_const]
+    fn b(&self) {
+        ().a()
+        //~^ ERROR calls in constant functions are limited
+    }
+}
+
+impl Tr for () {}
+
+fn main() {}