-Rust 1.56.0 (2021-10-21)
+Version 1.56.0 (2021-10-21)
========================
Language
- [The 2021 Edition is now stable.][rust#88100]
See [the edition guide][rust-2021-edition-guide] for more details.
-- [You can now specify explicit discriminant values on any Rust enum.][rust#86860]
- [The pattern in `binding @ pattern` can now also introduce new bindings.][rust#85305]
- [Union field access is permitted in `const fn`.][rust#85769]
This feature is primarily intended for usage by `cargo fix`, rather than end users.
- [Promote `aarch64-apple-ios-sim` to Tier 2\*.][rust#87760]
- [Add `powerpc-unknown-freebsd` at Tier 3\*.][rust#87370]
+- [Add `riscv32imc-esp-espidf` at Tier 3\*.][rust#87666]
\* Refer to Rust's [platform support page][platform-support-doc] for more
information on Rust's tiered platform support.
---------------
- [`std::os::unix::fs::chroot`]
-- [`Iterator::intersperse`]
-- [`Iterator::intersperse_with`]
- [`UnsafeCell::raw_get`]
- [`BufWriter::into_parts`]
- [`core::panic::{UnwindSafe, RefUnwindSafe, AssertUnwindSafe}`]
- [Cargo supports specifying a minimum supported Rust version in Cargo.toml.][`rust-version`]
This has no effect at present on dependency version selection.
We encourage crates to specify their minimum supported Rust version, and we encourage CI systems
- that support Rust code to include a crate's specified minimum version in the text matrix for that
+ that support Rust code to include a crate's specified minimum version in the test matrix for that
crate by default.
Compatibility notes
[rust#87619]: https://github.com/rust-lang/rust/pull/87619
[rust#81825]: https://github.com/rust-lang/rust/pull/81825#issuecomment-808406918
[rust#88019]: https://github.com/rust-lang/rust/pull/88019
+[rust#87666]: https://github.com/rust-lang/rust/pull/87666
Version 1.55.0 (2021-09-09)
============================