Make ConstPropLint lint run on promoteds by gurry · Pull Request #119432 · rust-lang/rust (original) (raw)

This is based on the pkgsrc-wip rust180 package, retaining the main pkgsrc changes as best as I could.

Pkgsrc changes:

• Adapt checksums and patches.
• Make this work again on big-endian aarch64 (at least on NetBSD).
• Make the choice of GCC = 12 work for sparc64 by testing options after options.mk is included (which is required...). Makes this work on NetBSD/sparc64 10.0 again.

Upstream chnages:

Version 1.80.1 (2024-08-08)

• [Fix miscompilation in the jump threading MIR optimization when comparing floats] (rust-lang/rust#128271)
• [Revert changes to the dead_code lint from 1.80.0] (rust-lang/rust#128618)

Version 1.80.0 (2024-07-25)

Language

• [Document maximum allocation size] (rust-lang/rust#116675)
• [Allow zero-byte offsets and ZST read/writes on arbitrary pointers] (rust-lang/rust#117329)
• [Support C23's variadics without a named parameter] (rust-lang/rust#124048)
• [Stabilize exclusive_range_pattern feature] (rust-lang/rust#124459)
• [Guarantee layout and ABI of Result in some scenarios] (rust-lang/rust#124870)

Compiler

• [Update cc crate to v1.0.97 allowing additional spectre mitigations on MSVC targets] (rust-lang/rust#124892)
• [Allow field reordering on types marked repr(packed(1))] (rust-lang/rust#125360)
• [Add a lint against never type fallback affecting unsafe code] (rust-lang/rust#123939)
• [Disallow cast with trailing braced macro in let-else] (rust-lang/rust#125049)
• [Expand for_loops_over_fallibles lint to lint on fallibles behind references.] (rust-lang/rust#125156)
• [self-contained linker: retry linking without -fuse-ld=lld on CCs that don't support it] (rust-lang/rust#125417)
• [Do not parse CVarArgs (...) as a type in trait bounds] (rust-lang/rust#125863)
• Improvements to LLDB formatting [#124458] (rust-lang/rust#124458) [#124500] (rust-lang/rust#124500)
• [For the wasm32-wasip2 target default to PIC and do not use -fuse-ld=lld] (rust-lang/rust#124858)
• [Add x86_64-unknown-linux-none as a tier 3 target] (rust-lang/rust#125023)
• [Lint on foo.into_iter() resolving to &Box<[T]>: IntoIterator] (rust-lang/rust#124097)

Libraries

• [Add size_of and size_of_val and align_of and align_of_val to the prelude] (rust-lang/rust#123168)
• [Abort a process when FD ownership is violated] (rust-lang/rust#124210)
• [io::Write::write_fmt: panic if the formatter fails when the stream does not fail] (rust-lang/rust#125012)
• [Panic if PathBuf::set_extension would add a path separator] (rust-lang/rust#125070)
• [Add assert_unsafe_precondition to unchecked_{add,sub,neg,mul,shl,shr} methods] (rust-lang/rust#121571)
• [Update c_char on AIX to use the correct type] (rust-lang/rust#122986)
• [offset_of! no longer returns a temporary] (rust-lang/rust#124484)
• [Handle sigma in str.to_lowercase correctly] (rust-lang/rust#124773)
• [Raise DEFAULT_MIN_STACK_SIZE to at least 64KiB] (rust-lang/rust#126059)

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)
• [<[u8]>::trim_ascii] (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii)
• [<[u8]>::trim_ascii_start] (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii_start)
• [<[u8]>::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)

Cargo

• [Stabilize -Zcheck-cfg as always enabled] (rust-lang/cargo#13571)
• [Warn, rather than fail publish, if a target is excluded] (rust-lang/cargo#13713)
• [Add special check-cfg lint config for the unexpected_cfgs lint] (rust-lang/cargo#13913)
• [Stabilize cargo update --precise <yanked>] (rust-lang/cargo#13974)
• [Don't change file permissions on Cargo.toml when using cargo add] (rust-lang/cargo#13898)
• [Support using cargo fix on IPv6-only networks] (rust-lang/cargo#13907)

Rustdoc

• [Allow searching for references] (rust-lang/rust#124148)
• [Stabilize custom_code_classes_in_docs feature] (rust-lang/rust#124577)
• [fix: In cross-crate scenarios show enum variants on type aliases of enums] (rust-lang/rust#125300)

Compatibility Notes

• [rustfmt estimates line lengths differently when using non-ascii characters] (rust-lang/rustfmt#6203)
• [Type aliases are now handled correctly in orphan check] (rust-lang/rust#117164)
• [Allow instructing rustdoc to read from stdin via -] (rust-lang/rust#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] (rust-lang/rust#124636)
• [Warn (or error) when Self constructor from outer item is referenced in inner nested item] (rust-lang/rust#124187)
• [Turn indirect_structural_match and pointer_structural_match lints into hard errors] (rust-lang/rust#124661)
• [Make where_clause_object_safety lint a regular object safety violation] (rust-lang/rust#125380)
• [Turn proc_macro_back_compat lint into a hard error.] (rust-lang/rust#125596)
• [Detect unused structs even when implementing private traits] (rust-lang/rust#122382)
• [std::sync::ReentrantLockGuard<T> is no longer Sync if T: !Sync] (rust-lang/rust#125527) which means [std::io::StdoutLock and std::io::StderrLock are no longer Sync] (rust-lang/rust#127340)

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] (rust-lang/rust#124738) and [#123734] (rust-lang/rust#123734)
• [MSVC targets no longer depend on libc] (rust-lang/rust#124050)

Version 1.79.0 (2024-06-13)

Language

• [Stabilize inline const {} expressions.] (rust-lang/rust#104087)
• [Prevent opaque types being instantiated twice with different regions within the same function.] (rust-lang/rust#116935)
• [Stabilize WebAssembly target features that are in phase 4 and 5.] (rust-lang/rust#117457)
• [Add the redundant_lifetimes lint to detect lifetimes which are semantically redundant.] (rust-lang/rust#118391)
• [Stabilize the unnameable_types lint for public types that can't be named.] (rust-lang/rust#120144)
• [Enable debuginfo in macros, and stabilize -C collapse-macro-debuginfo and #[collapse_debuginfo].] (rust-lang/rust#120845)
• [Propagate temporary lifetime extension into if and match expressions.] (rust-lang/rust#121346)
• [Restrict promotion of const fn calls.] (rust-lang/rust#121557)
• [Warn against refining impls of crate-private traits with refining_impl_trait lint.] (rust-lang/rust#121720)
• [Stabilize associated type bounds (RFC 2289).] (rust-lang/rust#122055)
• [Stabilize importing main from other modules or crates.] (rust-lang/rust#122060)
• [Check return types of function types for well-formedness] (rust-lang/rust#115538)
• [Rework impl Trait lifetime inference] (rust-lang/rust#116891)
• [Change inductive trait solver cycles to be ambiguous] (rust-lang/rust#122791)

Compiler

• [Define -C strip to only affect binaries, not artifacts like .pdb.] (rust-lang/rust#115120)
• [Stabilize -Crelro-level for controlling runtime link hardening.] (rust-lang/rust#121694)
• [Stabilize checking of cfg names and values at compile-time with --check-cfg.] (rust-lang/rust#123501) Note that this only stabilizes the compiler part, the Cargo part is still unstable in this release.
• [Add aarch64-apple-visionos and aarch64-apple-visionos-sim tier 3 targets.] (rust-lang/rust#121419)
• [Add riscv32ima-unknown-none-elf tier 3 target.] (rust-lang/rust#122696)
• [Promote several Windows targets to tier 2] (rust-lang/rust#121712): aarch64-pc-windows-gnullvm, i686-pc-windows-gnullvm, and x86_64-pc-windows-gnullvm.

Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support.

Libraries

• [Implement FromIterator for (impl Default + Extend, impl Default + Extend).] (rust-lang/rust#107462)
• [Implement {Div,Rem}Assign<NonZero<X>> on X.] (rust-lang/rust#121952)
• [Document overrides of clone_from() in core/std.] (rust-lang/rust#122201)
• [Link MSVC default lib in core.] (rust-lang/rust#122268)
• [Caution against using transmute between pointers and integers.] (rust-lang/rust#122379)
• [Enable frame pointers for the standard library.] (rust-lang/rust#122646)

Stabilized APIs

• [{integer}::unchecked_add] (https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_add)
• [{integer}::unchecked_mul] (https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_mul)
• [{integer}::unchecked_sub] (https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_sub)
• [<[T]>::split_at_unchecked] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_unchecked)
• [<[T]>::split_at_mut_unchecked] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut_unchecked)
• [<[u8]>::utf8_chunks] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.utf8_chunks)
• [str::Utf8Chunks] (https://doc.rust-lang.org/stable/core/str/struct.Utf8Chunks.html)
• [str::Utf8Chunk] (https://doc.rust-lang.org/stable/core/str/struct.Utf8Chunk.html)
• [<*const T>::is_aligned] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_aligned)
• [<*mut T>::is_aligned] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_aligned-1)
• [NonNull::is_aligned] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.is_aligned)
• [<*const [T]>::len] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.len)
• [<*mut [T]>::len] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.len-1)
• [<*const [T]>::is_empty] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_empty)
• [<*mut [T]>::is_empty] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_empty-1)
• [NonNull::<[T]>::is_empty] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.is_empty)
• [CStr::count_bytes] (https://doc.rust-lang.org/stable/core/ffi/c_str/struct.CStr.html#method.count_bytes)
• [io::Error::downcast] (https://doc.rust-lang.org/stable/std/io/struct.Error.html#method.downcast)
• [num::NonZero<T>] (https://doc.rust-lang.org/stable/core/num/struct.NonZero.html)
• [path::absolute] (https://doc.rust-lang.org/stable/std/path/fn.absolute.html)
• [proc_macro::Literal::byte_character] (https://doc.rust-lang.org/stable/proc_macro/struct.Literal.html#method.byte_character)
• [proc_macro::Literal::c_string] (https://doc.rust-lang.org/stable/proc_macro/struct.Literal.html#method.c_string)

These APIs are now stable in const contexts:

• [Atomic*::into_inner] (https://doc.rust-lang.org/stable/core/sync/atomic/struct.AtomicUsize.html#method.into_inner)
• [io::Cursor::new] (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.new)
• [io::Cursor::get_ref] (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.get_ref)
• [io::Cursor::position] (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.position)
• [io::empty] (https://doc.rust-lang.org/stable/std/io/fn.empty.html)
• [io::repeat] (https://doc.rust-lang.org/stable/std/io/fn.repeat.html)
• [io::sink] (https://doc.rust-lang.org/stable/std/io/fn.sink.html)
• [panic::Location::caller] (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.caller)
• [panic::Location::file] (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.file)
• [panic::Location::line] (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.line)
• [panic::Location::column] (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.column)

Cargo

• [Prevent dashes in lib.name, always normalizing to _.] (rust-lang/cargo#12783)
• [Stabilize MSRV-aware version requirement selection in cargo add.] (rust-lang/cargo#13608)
• [Switch to using gitoxide by default for listing files.] (rust-lang/cargo#13696)

Rustdoc

• [Always display stability version even if it's the same as the containing item.] (rust-lang/rust#118441)
• [Show a single search result for items with multiple paths.] (rust-lang/rust#119912)
• [Support typing / in docs to begin a search.] (rust-lang/rust#123355)

Misc

Compatibility Notes

• [Update the minimum external LLVM to 17.] (rust-lang/rust#122649)
• [RustcEncodable and RustcDecodable are soft-destabilized, to be removed from the prelude in next edition.] (rust-lang/rust#116016)
• [The wasm_c_abi future-incompatibility lint will warn about use of the non-spec-compliant C ABI.] (rust-lang/rust#117918) Use wasm-bindgen v0.2.88 to generate forward-compatible bindings.
• [Check return types of function types for well-formedness] (rust-lang/rust#115538)

Version 1.78.0 (2024-05-02)

Language

• [Stabilize #[cfg(target_abi = ...)]] (rust-lang/rust#119590)
• [Stabilize the #[diagnostic] namespace and #[diagnostic::on_unimplemented] attribute] (rust-lang/rust#119888)
• [Make async-fn-in-trait implementable with concrete signatures] (rust-lang/rust#120103)
• [Make matching on NaN a hard error, and remove the rest of illegal_floating_point_literal_pattern] (rust-lang/rust#116284)
• [static mut: allow mutable reference to arbitrary types, not just slices and arrays] (rust-lang/rust#117614)
• [Extend invalid_reference_casting to include references casting to bigger memory layout] (rust-lang/rust#118983)
• [Add non_contiguous_range_endpoints lint for singleton gaps after exclusive ranges] (rust-lang/rust#118879)
• [Add wasm_c_abi lint for use of older wasm-bindgen versions] (rust-lang/rust#117918) This lint currently only works when using Cargo.
• [Update indirect_structural_match and pointer_structural_match lints to match RFC] (rust-lang/rust#120423)
• [Make non-PartialEq-typed consts as patterns a hard error] (rust-lang/rust#120805)
• [Split refining_impl_trait lint into _reachable, _internal variants] (rust-lang/rust#121720)
• [Remove unnecessary type inference when using associated types inside of higher ranked where-bounds] (rust-lang/rust#119849)
• [Weaken eager detection of cyclic types during type inference] (rust-lang/rust#119989)
• [trait Trait: Auto {}: allow upcasting from dyn Trait to dyn Auto] (rust-lang/rust#119338)

Compiler

• [Made INVALID_DOC_ATTRIBUTES lint deny by default] (rust-lang/rust#111505)
• [Increase accuracy of redundant use checking] (rust-lang/rust#117772)
• [Suggest moving definition if non-found macro_rules! is defined later] (rust-lang/rust#121130)
• [Lower transmutes from int to pointer type as gep on null] (rust-lang/rust#121282)

Target changes:

• [Windows tier 1 targets now require at least Windows 10] (rust-lang/rust#115141)
• [Enable CMPXCHG16B, SSE3, SAHF/LAHF and 128-bit Atomics in tier 1 Windows] (rust-lang/rust#120820)
• [Add wasm32-wasip1 tier 2 (without host tools) target] (rust-lang/rust#120468)
• [Add wasm32-wasip2 tier 3 target] (rust-lang/rust#119616)
• [Rename wasm32-wasi-preview1-threads to wasm32-wasip1-threads] (rust-lang/rust#122170)
• [Add arm64ec-pc-windows-msvc tier 3 target] (rust-lang/rust#119199)
• [Add armv8r-none-eabihf tier 3 target for the Cortex-R52] (rust-lang/rust#110482)
• [Add loongarch64-unknown-linux-musl tier 3 target] (rust-lang/rust#121832)

Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support.

Libraries

• [Bump Unicode to version 15.1.0, regenerate tables] (rust-lang/rust#120777)
• [Make align_offset, align_to well-behaved in all cases] (rust-lang/rust#121201)
• [PartialEq, PartialOrd: document expectations for transitive chains] (rust-lang/rust#115386)
• [Optimize away poison guards when std is built with panic=abort] (rust-lang/rust#100603)
• [Replace pthread RwLock with custom implementation] (rust-lang/rust#110211)
• [Implement unwind safety for Condvar on all platforms] (rust-lang/rust#121768)
• [Add ASCII fast-path for char::is_grapheme_extended] (rust-lang/rust#121138)

Stabilized APIs

• [impl Read for &Stdin] (https://doc.rust-lang.org/stable/std/io/struct.Stdin.html#impl-Read-for-%26Stdin)
• [Accept non 'static lifetimes for several std::error::Error related implementations] (rust-lang/rust#113833)
• [Make impl<Fd: AsFd> impl take ?Sized] (rust-lang/rust#114655)
• [impl From<TryReserveError> for io::Error] (https://doc.rust-lang.org/stable/std/io/struct.Error.html#impl-From%3CTryReserveError%3E-for-Error)

These APIs are now stable in const contexts:

• [Barrier::new()] (https://doc.rust-lang.org/stable/std/sync/struct.Barrier.html#method.new)

Cargo

• Stabilize lockfile v4
• [Respect rust-version when generating lockfile] (rust-lang/cargo#12861)
• [Control --charset via auto-detecting config value] (rust-lang/cargo#13337)
• [Support target.<triple>.rustdocflags officially] (rust-lang/cargo#13197)
• [Stabilize global cache data tracking] (rust-lang/cargo#13492)

Misc

• [rustdoc: add --test-builder-wrapper arg to support wrappers such as RUSTC_WRAPPER when building doctests] (rust-lang/rust#114651)

Compatibility Notes

• [Many unsafe precondition checks now run for user code with debug assertions enabled] (rust-lang/rust#120594) This change helps users catch undefined behavior in their code, though the details of how much is checked are generally not stable.
• [riscv only supports split_debuginfo=off for now] (rust-lang/rust#120518)
• [Consistently check bounds on hidden types of impl Trait] (rust-lang/rust#121679)
• [Change equality of higher ranked types to not rely on subtyping] (rust-lang/rust#118247)
• [When called, additionally check bounds on normalized function return type] (rust-lang/rust#118882)
• [Expand coverage for arithmetic_overflow lint] (rust-lang/rust#119432)

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.

• Update to LLVM 18
• [Build rustc with 1CGU on x86_64-pc-windows-msvc] (rust-lang/rust#112267)
• [Build rustc with 1CGU on x86_64-apple-darwin] (rust-lang/rust#112268)
• [Introduce run-make V2 infrastructure, a run_make_support library and port over 2 tests as example] (rust-lang/rust#113026)
• [Windows: Implement condvar, mutex and rwlock using futex] (rust-lang/rust#121956)

Version 1.77.0 (2024-03-21)

• [Reveal opaque types within the defining body for exhaustiveness checking.] (rust-lang/rust#116821)
• [Stabilize C-string literals.] (rust-lang/rust#117472)
• [Stabilize THIR unsafeck.] (rust-lang/rust#117673)
• [Add lint static_mut_refs to warn on references to mutable statics.] (rust-lang/rust#117556)
• [Support async recursive calls (as long as they have indirection).] (rust-lang/rust#117703)
• [Undeprecate lint unstable_features and make use of it in the compiler.] (rust-lang/rust#118639)
• [Make inductive cycles in coherence ambiguous always.] (rust-lang/rust#118649)
• [Get rid of type-driven traversal in const-eval interning] (rust-lang/rust#119044), only as a [future compatiblity lint] (rust-lang/rust#122204) for now.
• [Deny braced macro invocations in let-else.] (rust-lang/rust#119062)

Compiler

• [Include lint soft_unstable in future breakage reports.] (rust-lang/rust#116274)
• [Make i128 and u128 16-byte aligned on x86-based targets.] (rust-lang/rust#116672)
• [Use --verbose in diagnostic output.] (rust-lang/rust#119129)
• [Improve spacing between printed tokens.] (rust-lang/rust#120227)
• [Merge the unused_tuple_struct_fields lint into dead_code.] (rust-lang/rust#118297)
• [Error on incorrect implied bounds in well-formedness check] (rust-lang/rust#118553), with a temporary exception for Bevy.
• [Fix coverage instrumentation/reports for non-ASCII source code.] (rust-lang/rust#119033)
• [Fix fn/const items implied bounds and well-formedness check.] (rust-lang/rust#120019)
• [Promote riscv32{im|imafc}-unknown-none-elf targets to tier 2.] (rust-lang/rust#118704)
• Add several new tier 3 targets:
  • [aarch64-unknown-illumos] (rust-lang/rust#112936)
  • [hexagon-unknown-none-elf] (rust-lang/rust#117601)
  • [riscv32imafc-esp-espidf] (rust-lang/rust#119738)
  • [riscv32im-risc0-zkvm-elf] (rust-lang/rust#117958)

Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support.

Libraries

• [Implement From<&[T; N]> for Cow<[T]>.] (rust-lang/rust#113489)
• Remove special-case handling of vec.split_off (0).

Stabilized APIs

• [array::each_ref] (https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_ref)
• [array::each_mut] (https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_mut)
• [core::net] (https://doc.rust-lang.org/stable/core/net/index.html)
• [f32::round_ties_even] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round_ties_even)
• [f64::round_ties_even] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round_ties_even)
• [mem::offset_of!] (https://doc.rust-lang.org/stable/std/mem/macro.offset_of.html)
• [slice::first_chunk] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.first_chunk)
• [slice::first_chunk_mut] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.first_chunk_mut)
• [slice::split_first_chunk] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_first_chunk)
• [slice::split_first_chunk_mut] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_first_chunk_mut)
• [slice::last_chunk] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.last_chunk)
• [slice::last_chunk_mut] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.last_chunk_mut)
• [slice::split_last_chunk] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_last_chunk)
• [slice::split_last_chunk_mut] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_last_chunk_mut)
• [slice::chunk_by] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.chunk_by)
• [slice::chunk_by_mut] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.chunk_by_mut)
• [Bound::map] (https://doc.rust-lang.org/stable/std/ops/enum.Bound.html#method.map)
• [File::create_new] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.create_new)
• [Mutex::clear_poison] (https://doc.rust-lang.org/stable/std/sync/struct.Mutex.html#method.clear_poison)
• [RwLock::clear_poison] (https://doc.rust-lang.org/stable/std/sync/struct.RwLock.html#method.clear_poison)

Cargo

• [Extend the build directive syntax with cargo::.] (rust-lang/cargo#12201)
• [Stabilize metadata id format as PackageIDSpec.] (rust-lang/cargo#12914)
• [Pull out as cargo-util-schemas as a crate.] (rust-lang/cargo#13178)
• [Strip all debuginfo when debuginfo is not requested.] (rust-lang/cargo#13257)
• [Inherit jobserver from env for all kinds of runners.] (rust-lang/cargo#12776)
• [Deprecate rustc plugin support in cargo.] (rust-lang/cargo#13248)

Rustdoc

• [Allows links in markdown headings.] (rust-lang/rust#117662)
• [Search for tuples and unit by type with ().] (rust-lang/rust#118194)
• [Clean up the source sidebar's hide button.] (rust-lang/rust#119066)
• [Prevent JS injection from localStorage.] (rust-lang/rust#120250)

Misc

• [Recommend version-sorting for all sorting in style guide.] (rust-lang/rust#115046)

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.

• [Add more weirdness to weird-exprs.rs.] (rust-lang/rust#119028)