Version 1.64.0 (2022-09-22)

Language

Compiler

Libraries

Stabilized APIs

These types were previously stable in std::ffi, but are now also available in core and alloc:

These types were previously stable in std::os::raw, but are now also available in core::ffi and std::ffi:

These APIs are now usable in const contexts:

Cargo

Misc

Compatibility Notes

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.