Changelog for rust1.61-1.61.0-150300.7.3.1.x86_64.rpm :

* Thu Jun 02 2022 william.brownAATTsuse.com- Correct issue with linker that caused build ids to be invalid
* Fri May 20 2022 william.brownAATTsuse.comVersion 1.61.0 (2022-05-19) Language--------- [`const fn` signatures can now include generic trait bounds][93827]- [`const fn` signatures can now use `impl Trait` in argument and return position][93827]- [Function pointers can now be created, cast, and passed around in a `const fn`][93827]- [Recursive calls can now set the value of a function\'s opaque `impl Trait` return type][94081] Compiler--------- [Linking modifier syntax in `#[link]` attributes and on the command line, as well as the `whole-archive` modifier specifically, are now supported][93901]- [The `char` type is now described as UTF-32 in debuginfo][89887]- The [`#[target_feature]`][target_feature] attribute [can now be used with aarch64 features][90621]- X86 [`#[target_feature = \"adx\"]` is now stable][93745] Libraries---------- [`ManuallyDrop` is now documented to have the same layout as `T`][88375]- [`#[ignore = \"…\"]` messages are printed when running tests][92714]- [Consistently show absent stdio handles on Windows as NULL handles][93263]- [Make `std::io::stdio::lock()` return `\'static` handles.][93965] Previously, the creation of locked handles to stdin/stdout/stderr would borrow the handles being locked, which prevented writing `let out = std::io::stdout().lock();` because `out` would outlive the return value of `stdout()`. Such code now works, eliminating a common pitfall that affected many Rust users.- [`Vec::from_raw_parts` is now less restrictive about its inputs][95016]- [`std::thread::available_parallelism` now takes cgroup quotas into account.][92697] Since `available_parallelism` is often used to create a thread pool for parallel computation, which may be CPU-bound for performance, `available_parallelism` will return a value consistent with the ability to use that many threads continuously, if possible. For instance, in a container with 8 virtual CPUs but quotas only allowing for 50% usage, `available_parallelism` will return 4. Stabilized APIs- [`Pin::static_mut`]- [`Pin::static_ref`]- [`Vec::retain_mut`]- [`VecDeque::retain_mut`]- [`Write` for `Cursor<[u8; N]>`][cursor-write-array]- [`std::os::unix::net::SocketAddr::from_pathname`]- [`std::process::ExitCode`] and [`std::process::Termination`]. The stabilization of these two APIs now makes it possible for programs to return errors from `main` with custom exit codes.- [`std::thread::JoinHandle::is_finished`] These APIs are now usable in const contexts:- [`<
*const T>::offset` and `<
*mut T>::offset`][ptr-offset]- [`<
*const T>::wrapping_offset` and `<
*mut T>::wrapping_offset`][ptr-wrapping_offset]- [`<
*const T>::add` and `<
*mut T>::add`][ptr-add]- [`<
*const T>::sub` and `<
*mut T>::sub`][ptr-sub]- [`<
*const T>::wrapping_add` and `<
*mut T>::wrapping_add`][ptr-wrapping_add]- [`<
*const T>::wrapping_sub` and `<
*mut T>::wrapping_sub`][ptr-wrapping_sub]- [`<[T]>::as_mut_ptr`][slice-as_mut_ptr]- [`<[T]>::as_ptr_range`][slice-as_ptr_range]- [`<[T]>::as_mut_ptr_range`][slice-as_mut_ptr_range] Cargo----- No feature changes, but see compatibility notes. Compatibility Notes- Previously native static libraries were linked as `whole-archive` in some cases, but now rustc tries not to use `whole-archive` unless explicitly requested. This [change][93901] may result in linking errors in some cases. To fix such errors, native libraries linked from the command line, build scripts, or [`#[link]` attributes][link-attr] need to - (more common) either be reordered to respect dependencies between them (if `a` depends on `b` then `a` should go first and `b` second) - (less common) or be updated to use the [`+whole-archive`] modifier.- [Catching a second unwind from FFI code while cleaning up from a Rust panic now causes the process to abort][92911]- [Proc macros no longer see `ident` matchers wrapped in groups][92472]- [The number of `#` in `r#` raw string literals is now required to be less than 256][95251]- [When checking that a dyn type satisfies a trait bound, supertrait bounds are now enforced][92285]- [`cargo vendor` now only accepts one value for each `--sync` flag][cargo/10448]- [`cfg` predicates in `all()` and `any()` are always evaluated to detect errors, instead of short-circuiting.][94295] The compatibility considerations here arise in nightly-only code that used the short-circuiting behavior of `all` to write something like `cfg(all(feature = \"nightly\", syntax-requiring-nightly))`, which will now fail to compile. Instead, use either `cfg_attr(feature = \"nightly\", ...)` or nested uses of `cfg`.- [bootstrap: static-libstdcpp is now enabled by default, and can now be disabled when llvm-tools is enabled][94832]