Rollup of 5 pull requests

RELEASES.md

@@ -1,3 +1,161 @@
+Version 1.80 (2024-07-25)
+==========================
+
+<a id="1.80-Language"></a>
+
+Language
+--------
+- [Document maximum allocation size](https://github.com/rust-lang/rust/pull/116675/)
+- [Allow zero-byte offsets and ZST read/writes on arbitrary pointers](https://github.com/rust-lang/rust/pull/117329/)
+- [Support C23's variadics without a named parameter](https://github.com/rust-lang/rust/pull/124048/)
+- [Stabilize `exclusive_range_pattern` feature](https://github.com/rust-lang/rust/pull/124459/)
+- [Guarantee layout and ABI of `Result` in some scenarios](https://github.com/rust-lang/rust/pull/124870)
+
+<a id="1.80-Compiler"></a>
+
+Compiler
+--------
+- [Update cc crate to v1.0.97 allowing additional spectre mitigations on MSVC targets](https://github.com/rust-lang/rust/pull/124892/)
+- [Allow field reordering on types marked `repr(packed(1))`](https://github.com/rust-lang/rust/pull/125360/)
+- [Add a lint against never type fallback affecting unsafe code](https://github.com/rust-lang/rust/pull/123939/)
+- [Disallow cast with trailing braced macro in let-else](https://github.com/rust-lang/rust/pull/125049/)
+- [Expand `for_loops_over_fallibles` lint to lint on fallibles behind references.](https://github.com/rust-lang/rust/pull/125156/)
+- [self-contained linker: retry linking without `-fuse-ld=lld` on CCs that don't support it](https://github.com/rust-lang/rust/pull/125417/)
+- [Do not parse CVarArgs (`...`) as a type in trait bounds](https://github.com/rust-lang/rust/pull/125863/)
+- Improvements to LLDB formatting [#124458](https://github.com/rust-lang/rust/pull/124458) [#124500](https://github.com/rust-lang/rust/pull/124500)
+- [For the wasm32-wasip2 target default to PIC and do not use `-fuse-ld=lld`](https://github.com/rust-lang/rust/pull/124858/)
+- [Add x86_64-unknown-linux-none as a tier 3 target](https://github.com/rust-lang/rust/pull/125023/)
+- [Lint on `foo.into_iter()` resolving to `&Box<[T]>: IntoIterator`](https://github.com/rust-lang/rust/pull/124097/)
+
+<a id="1.80-Libraries"></a>
+
+Libraries
+---------
+- [Add `size_of` and `size_of_val` and `align_of` and `align_of_val` to the prelude](https://github.com/rust-lang/rust/pull/123168/)
+- [Abort a process when FD ownership is violated](https://github.com/rust-lang/rust/pull/124210/)
+- [io::Write::write_fmt: panic if the formatter fails when the stream does not fail](https://github.com/rust-lang/rust/pull/125012/)
+- [Panic if `PathBuf::set_extension` would add a path separator](https://github.com/rust-lang/rust/pull/125070/)
+- [Add assert_unsafe_precondition to unchecked_{add,sub,neg,mul,shl,shr} methods](https://github.com/rust-lang/rust/pull/121571/)
+- [Update `c_char` on AIX to use the correct type](https://github.com/rust-lang/rust/pull/122986/)
+- [`offset_of!` no longer returns a temporary](https://github.com/rust-lang/rust/pull/124484/)
+- [Handle sigma in `str.to_lowercase` correctly](https://github.com/rust-lang/rust/pull/124773/)
+- [Raise `DEFAULT_MIN_STACK_SIZE` to at least 64KiB](https://github.com/rust-lang/rust/pull/126059/)
+
+<a id="1.80-Stabilized-APIs"></a>
+
+Stabilized APIs
+---------------
+- [`impl Default for Rc<CStr>`](https://doc.rust-lang.org/beta/alloc/rc/struct.Rc.html#impl-Default-for-Rc%3CCStr%3E)
+- [`impl Default for Rc<str>`](https://doc.rust-lang.org/beta/alloc/rc/struct.Rc.html#impl-Default-for-Rc%3Cstr%3E)
+- [`impl Default for Rc<[T]>`](https://doc.rust-lang.org/beta/alloc/rc/struct.Rc.html#impl-Default-for-Rc%3C%5BT%5D%3E)
+- [`impl Default for Arc<str>`](https://doc.rust-lang.org/beta/alloc/sync/struct.Arc.html#impl-Default-for-Arc%3Cstr%3E)
+- [`impl Default for Arc<CStr>`](https://doc.rust-lang.org/beta/alloc/sync/struct.Arc.html#impl-Default-for-Arc%3CCStr%3E)
+- [`impl Default for Arc<[T]>`](https://doc.rust-lang.org/beta/alloc/sync/struct.Arc.html#impl-Default-for-Arc%3C%5BT%5D%3E)
+- [`impl IntoIterator for Box<[T]>`](https://doc.rust-lang.org/beta/alloc/boxed/struct.Box.html#impl-IntoIterator-for-Box%3C%5BI%5D,+A%3E)
+- [`impl FromIterator<String> for Box<str>`](https://doc.rust-lang.org/beta/alloc/boxed/struct.Box.html#impl-FromIterator%3CString%3E-for-Box%3Cstr%3E) 
+- [`impl FromIterator<char> for Box<str>`](https://doc.rust-lang.org/beta/alloc/boxed/struct.Box.html#impl-FromIterator%3Cchar%3E-for-Box%3Cstr%3E)
+- [`LazyCell`](https://doc.rust-lang.org/beta/core/cell/struct.LazyCell.html)
+- [`LazyLock`](https://doc.rust-lang.org/beta/std/sync/struct.LazyLock.html)
+- [`Duration::div_duration_f32`](https://doc.rust-lang.org/beta/std/time/struct.Duration.html#method.div_duration_f32)
+- [`Duration::div_duration_f64`](https://doc.rust-lang.org/beta/std/time/struct.Duration.html#method.div_duration_f64)
+- [`Option::take_if`](https://doc.rust-lang.org/beta/std/option/enum.Option.html#method.take_if)
+- [`Seek::seek_relative`](https://doc.rust-lang.org/beta/std/io/trait.Seek.html#method.seek_relative)
+- [`BinaryHeap::as_slice`](https://doc.rust-lang.org/beta/std/collections/struct.BinaryHeap.html#method.as_slice)
+- [`NonNull::offset`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.offset)
+- [`NonNull::byte_offset`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_offset)
+- [`NonNull::add`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.add)
+- [`NonNull::byte_add`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_add)
+- [`NonNull::sub`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.sub)
+- [`NonNull::byte_sub`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_sub)
+- [`NonNull:offset_from`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.offset_from)
+- [`NonNull::byte_offset_from`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_offset_from)
+- [`NonNull::read`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.read)
+- [`NonNull::read_volatile`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.read_volatile)
+- [`NonNull::read_unaligned`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.read_unaligned)
+- [`NonNull::write`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write)
+- [`NonNull::write_volatile`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write_volatile)
+- [`NonNull::write_unaligned`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write_unaligned)
+- [`NonNull::write_bytes`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write_bytes)
+- [`NonNull::copy_to`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_to)
+- [`NonNull::copy_to_nonoverlapping`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_to_nonoverlapping)
+- [`NonNull::copy_from`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_from)
+- [`NonNull::copy_from_nonoverlapping`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_from_nonoverlapping)
+- [`NonNull::replace`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.replace)
+- [`NonNull::swap`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.swap)
+- [`NonNull::drop_in_place`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.drop_in_place)
+- [`NonNull::align_offset`](https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.align_offset)
+- [`<[T]>::split_at_checked`](https://doc.rust-lang.org/beta/std/primitive.slice.html#method.split_at_checked)
+- [`<[T]>::split_at_mut_checked`](https://doc.rust-lang.org/beta/std/primitive.slice.html#method.split_at_mut_checked)
+- [`str::split_at_checked`](https://doc.rust-lang.org/beta/std/primitive.str.html#method.split_at_checked)
+- [`str::split_at_mut_checked`](https://doc.rust-lang.org/beta/std/primitive.str.html#method.split_at_mut_checked)
+- [`str::trim_ascii`](https://doc.rust-lang.org/beta/std/primitive.str.html#method.trim_ascii)
+- [`str::trim_ascii_start`](https://doc.rust-lang.org/beta/std/primitive.str.html#method.trim_ascii_start)
+- [`str::trim_ascii_end`](https://doc.rust-lang.org/beta/std/primitive.str.html#method.trim_ascii_end)
+- [`<[AsciiChar]>::trim_ascii`](https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii)
+- [`<[AsciiChar]>::trim_ascii_start`](https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii_start)
+- [`<[AsciiChar]>::trim_ascii_end`](https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii_end)
+- [`Ipv4Addr::BITS`](https://doc.rust-lang.org/beta/core/net/struct.Ipv4Addr.html#associatedconstant.BITS)
+- [`Ipv4Addr::to_bits`](https://doc.rust-lang.org/beta/core/net/struct.Ipv4Addr.html#method.to_bits)
+- [`Ipv4Addr::from_bits`](https://doc.rust-lang.org/beta/core/net/struct.Ipv4Addr.html#method.from_bits)
+- [`Ipv6Addr::BITS`](https://doc.rust-lang.org/beta/core/net/struct.Ipv6Addr.html#associatedconstant.BITS)
+- [`Ipv6Addr::to_bits`](https://doc.rust-lang.org/beta/core/net/struct.Ipv6Addr.html#method.to_bits)
+- [`Ipv6Addr::from_bits`](https://doc.rust-lang.org/beta/core/net/struct.Ipv6Addr.html#method.from_bits)
+- [`Vec::<[T; N]>::into_flattened`](https://doc.rust-lang.org/beta/alloc/vec/struct.Vec.html#method.into_flattened)
+- [`<[[T; N]]>::as_flattened`](https://doc.rust-lang.org/beta/core/primitive.slice.html#method.as_flattened)
+- [`<[[T; N]]>::as_flattened_mut`](https://doc.rust-lang.org/beta/core/primitive.slice.html#method.as_flattened_mut)
+
+These APIs are now stable in const contexts:
+
+- [`<[T]>::last_chunk`](https://doc.rust-lang.org/beta/core/primitive.slice.html#method.last_chunk)
+- [`BinaryHeap::new`](https://doc.rust-lang.org/beta/std/collections/struct.BinaryHeap.html#method.new)
+
+<a id="1.80-Cargo"></a>
+
+Cargo
+-----
+- [Stabilize `-Zcheck-cfg` as always enabled](https://github.com/rust-lang/cargo/pull/13571/)
+- [Warn, rather than fail publish, if a target is excluded](https://github.com/rust-lang/cargo/pull/13713/)
+- [Add special `check-cfg` lint config for the `unexpected_cfgs` lint](https://github.com/rust-lang/cargo/pull/13913/)
+- [Stabilize `cargo update --precise <yanked>`](https://github.com/rust-lang/cargo/pull/13974/)
+- [Don't change file permissions on `Cargo.toml` when using `cargo add`](https://github.com/rust-lang/cargo/pull/13898/)
+- [Support using `cargo fix` on IPv6-only networks](https://github.com/rust-lang/cargo/pull/13907/)
+
+<a id="1.80-Rustdoc"></a>
+
+Rustdoc
+-----
+
+- [Allow searching for references](https://github.com/rust-lang/rust/pull/124148/)
+- [Stabilize `custom_code_classes_in_docs` feature](https://github.com/rust-lang/rust/pull/124577/)
+- [fix: In cross-crate scenarios show enum variants on type aliases of enums](https://github.com/rust-lang/rust/pull/125300/)
+
+<a id="1.80-Compatibility-Notes"></a>
+
+Compatibility Notes
+-------------------
+- [rustfmt estimates line lengths differently when using non-ascii characters](https://github.com/rust-lang/rustfmt/issues/6203)
+- [Type aliases are now handled correctly in orphan check](https://github.com/rust-lang/rust/pull/117164/)
+- [Allow instructing rustdoc to read from stdin via `-`](https://github.com/rust-lang/rust/pull/124611/)
+- [`std::env::{set_var, remove_var}` can no longer be converted to safe function pointers and no longer implement the `Fn` family of traits](https://github.com/rust-lang/rust/pull/124636)
+- [Warn (or error) when `Self` constructor from outer item is referenced in inner nested item](https://github.com/rust-lang/rust/pull/124187/)
+- [Turn `indirect_structural_match` and `pointer_structural_match` lints into hard errors](https://github.com/rust-lang/rust/pull/124661/)
+- [Make `where_clause_object_safety` lint a regular object safety violation](https://github.com/rust-lang/rust/pull/125380/)
+- [Turn `proc_macro_back_compat` lint into a hard error.](https://github.com/rust-lang/rust/pull/125596/)
+- [Detect unused structs even when implementing private traits](https://github.com/rust-lang/rust/pull/122382/)
+- [`std::sync::ReentrantLockGuard<T>` is no longer `Sync` if `T: !Sync`](https://github.com/rust-lang/rust/pull/125527) which means [`std::io::StdoutLock` and `std::io::StderrLock` are no longer Sync](https://github.com/rust-lang/rust/issues/127340)
+
+<a id="1.80-Internal-Changes"></a>
+
+Internal Changes
+----------------
+
+These changes do not affect any public interfaces of Rust, but they represent
+significant improvements to the performance or internals of rustc and related
+tools.
+
+- Misc improvements to size of generated html by rustdoc e.g. [#124738](https://github.com/rust-lang/rust/pull/124738/) and [#123734](https://github.com/rust-lang/rust/pull/123734/)
+- [MSVC targets no longer depend on libc](https://github.com/rust-lang/rust/pull/124050/)
+
 Version 1.79.0 (2024-06-13)
 ==========================
 

compiler/rustc_feature/src/accepted.rs

@@ -42,6 +42,10 @@ declare_features! (
     // feature-group-start: accepted features
     // -------------------------------------------------------------------------
 
+    // Note that the version indicates when it got *stabilized*.
+    // When moving an unstable feature here, set the version number to
+    // `CURRENT RUSTC VERSION` with ` ` replaced by `_`.
+
     /// Allows `#[target_feature(...)]` on aarch64 platforms
     (accepted, aarch64_target_feature, "1.61.0", Some(44839)),
     /// Allows using the `efiapi` ABI.

compiler/rustc_feature/src/lib.rs

@@ -31,6 +31,10 @@ use std::num::NonZero;
 #[derive(Debug, Clone)]
 pub struct Feature {
     pub name: Symbol,
+    /// For unstable features: the version the feature was added in.
+    /// For accepted features: the version the feature got stabilized in.
+    /// For removed features we are inconsistent; sometimes this is the
+    /// version it got added, sometimes the version it got removed.
     pub since: &'static str,
     issue: Option<NonZero<u32>>,
 }

compiler/rustc_feature/src/removed.rs

@@ -32,6 +32,12 @@ declare_features! (
     // feature-group-start: removed features
     // -------------------------------------------------------------------------
 
+    // Note that the version indicates when it got *removed*.
+    // When moving an unstable feature here, set the version number to
+    // `CURRENT RUSTC VERSION` with ` ` replaced by `_`.
+    // (But not all features below do this properly; many indicate the
+    // version they got originally added in.)
+
     /// Allows using the `amdgpu-kernel` ABI.
     (removed, abi_amdgpu_kernel, "1.77.0", Some(51575), None),
     (removed, advanced_slice_patterns, "1.0.0", Some(62254),

config.example.toml

@@ -609,7 +609,7 @@
 
 # Forces frame pointers to be used with `-Cforce-frame-pointers`.
 # This can be helpful for profiling at a small performance cost.
-# frame-pointers = false
+#frame-pointers = false
 
 # Indicates whether stack protectors should be used
 # via the unstable option `-Zstack-protector`.

library/std/src/process.rs

@@ -96,9 +96,9 @@
 //! child processes must agree on how the commandline string is encoded.
 //!
 //! Most programs use the standard C run-time `argv`, which in practice results
-//! in consistent argument handling. However some programs have their own way of
+//! in consistent argument handling. However, some programs have their own way of
 //! parsing the commandline string. In these cases using [`arg`] or [`args`] may
-//! result in the child process seeing a different array of arguments then the
+//! result in the child process seeing a different array of arguments than the
 //! parent process intended.
 //!
 //! Two ways of mitigating this are:

src/bootstrap/Cargo.lock

@@ -48,7 +48,6 @@ dependencies = [
  "clap_complete",
  "cmake",
  "fd-lock",
- "filetime",
  "home",
  "ignore",
  "junction",

src/bootstrap/Cargo.toml

@@ -44,7 +44,6 @@ build_helper = { path = "../tools/build_helper" }
 clap = { version = "4.4", default-features = false, features = ["std", "usage", "help", "derive", "error-context"] }
 clap_complete = "4.4"
 fd-lock = "4.0"
-filetime = "0.2"
 home = "0.5"
 ignore = "0.4"
 libc = "0.2"

src/bootstrap/src/core/build_steps/compile.rs

@@ -33,7 +33,6 @@ use crate::utils::helpers::{
 };
 use crate::LLVM_TOOLS;
 use crate::{CLang, Compiler, DependencyType, GitRepo, Mode};
-use filetime::FileTime;
 
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct Std {
@@ -2161,9 +2160,11 @@ pub fn strip_debug(builder: &Builder<'_>, target: TargetSelection, path: &Path)
         return;
     }
 
-    let previous_mtime = FileTime::from_last_modification_time(&path.metadata().unwrap());
+    let previous_mtime = t!(t!(path.metadata()).modified());
     command("strip").capture().arg("--strip-debug").arg(path).run(builder);
 
+    let file = t!(fs::File::open(path));
+
     // After running `strip`, we have to set the file modification time to what it was before,
     // otherwise we risk Cargo invalidating its fingerprint and rebuilding the world next time
     // bootstrap is invoked.
@@ -2176,5 +2177,5 @@ pub fn strip_debug(builder: &Builder<'_>, target: TargetSelection, path: &Path)
     // In the second invocation of bootstrap, Cargo will see that the mtime of librustc_driver.so
     // is greater than the mtime of rustc-main, and will rebuild rustc-main. That will then cause
     // everything else (standard library, future stages...) to be rebuilt.
-    t!(filetime::set_file_mtime(path, previous_mtime));
+    t!(file.set_modified(previous_mtime));
 }