- Stabilized numerous language and library APIs, including cfg(panic), cfg(target_has_atomic), Arc::new_cyclic, slice::escape_ascii, numeric abs/diff methods, and Duration::try_from_secs enhancements.
- Added new Tier‑3 targets (mips64‑openwrt‑linux‑musl, armv7‑unknown‑linux‑uclibc‑eabi) and a kernel target for RustyHermit; rustc now defaults to full backtraces and upgrades to LLVM 14.
- Changed Instant to saturate on underflow and removed non‑monotonic‑clock workarounds; updated Cargo behavior and refreshed documentation for tiered platforms.
Rust 1.60.0
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Language: allow shortening lifetimes of &mut during unsize coercions and introduce new lints for invalid runtime symbols and c void return types.