1.70.0 #
- Released on: 1 June, 2023
- Branched from master on: 14 April, 2023
Language #
- Relax ordering rules for
asm!operands - Properly allow macro expanded
format_argsinvocations to uses captures - Lint ambiguous glob re-exports
- Perform const and unsafe checking for expressions in
let _ = exprposition.
Compiler #
- Extend -Cdebuginfo with new options and named aliases
This provides a smaller version of debuginfo for cases that only need line number information
(
-Cdebuginfo=line-tables-only), which may eventually become the default for-Cdebuginfo=1. - Make
unused_allocationlint againstBox::newtoo - Detect uninhabited types early in const eval
- Switch to LLD as default linker for {arm,thumb}v4t-none-eabi
- Add tier 3 target
loongarch64-unknown-linux-gnu - Add tier 3 target for
i586-pc-nto-qnx700(QNX Neutrino RTOS, version 7.0), - Insert alignment checks for pointer dereferences as debug assertions This catches undefined behavior at runtime, and may cause existing code to fail.
Refer to Rust’s [platform support page][platform-support-doc] for more information on Rust’s tiered platform support.
Libraries #
- Document NonZeroXxx layout guarantees
- Windows: make
Commandprefer non-verbatim paths - Implement Default for some alloc/core iterators
- Fix handling of trailing bare CR in str::lines
- allow negative numeric literals in
concat! - Add documentation about the memory layout of
Cell - Use
partial_cmpto implement tuplelt/le/ge/gt - Stabilize
atomic_as_ptr - Stabilize
nonnull_slice_from_raw_parts - Partial stabilization of
once_cell - Stabilize
nonzero_min_max - Flatten/inline format_args!() and (string and int) literal arguments into format_args!()
- Stabilize movbe target feature
- don’t splice from files into pipes in io::copy
- Add a builtin unstable
FnPtrtrait that is implemented for all function pointers This extendsDebug,Pointer,Hash,PartialEq,Eq,PartialOrd, andOrdimplementations for function pointers with all ABIs.
Stabilized APIs #
NonZero*::MIN/MAXBinaryHeap::retainDefault for std::collections::binary_heap::IntoIterDefault for std::collections::btree_map::{IntoIter, Iter, IterMut}Default for std::collections::btree_map::{IntoKeys, Keys}Default for std::collections::btree_map::{IntoValues, Values}Default for std::collections::btree_map::RangeDefault for std::collections::btree_set::{IntoIter, Iter}Default for std::collections::btree_set::RangeDefault for std::collections::linked_list::{IntoIter, Iter, IterMut}Default for std::vec::IntoIterDefault for std::iter::ChainDefault for std::iter::ClonedDefault for std::iter::CopiedDefault for std::iter::EnumerateDefault for std::iter::FlattenDefault for std::iter::FuseDefault for std::iter::RevDefault for std::slice::IterDefault for std::slice::IterMutRc::into_innerArc::into_innerstd::cell::OnceCellOption::is_some_andNonNull::slice_from_raw_partsResult::is_ok_andResult::is_err_andstd::sync::atomic::Atomic*::as_ptrstd::io::IsTerminalstd::os::linux::net::SocketAddrExtstd::os::unix::net::UnixDatagram::bind_addrstd::os::unix::net::UnixDatagram::connect_addrstd::os::unix::net::UnixDatagram::send_to_addrstd::os::unix::net::UnixListener::bind_addrstd::path::Path::as_mut_os_strstd::sync::OnceLock
Cargo #
- Add
CARGO_PKG_README - Make
sparsethe default protocol for crates.io - Accurately show status when downgrading dependencies
- Use registry.default for login/logout
- Stabilize
cargo logout
Misc #
Compatibility Notes #
- Prevent stable
libtestfrom supporting-Zunstable-options - Perform const and unsafe checking for expressions in
let _ = exprposition. - WebAssembly targets enable
sign-extandmutable-globalsfeatures in codegen This may cause incompatibility with older execution environments. - Insert alignment checks for pointer dereferences as debug assertions This catches undefined behavior at runtime, and may cause existing code to fail.
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.