April 2026 monthly summary for rust-lang/rust focusing on delivering cross-platform shims for stat and lstat to improve compatibility across Linux and other Unix-like OSes, with tests and CI integration. No documented major bug fixes for this period; the work emphasizes cross-platform correctness and reliability.

March 2026 monthly summary for rust-lang/cargo. Focused on delivering profiling improvements, authentication robustness, and Git-dependency flexibility with alternative registries. Key outcomes include: 1) Profiling and frame-pointer control: added a Cargo profile setting 'frame-pointers' mapped to -C force-frame-pointers to improve stack unwinding and profiling accuracy; supports per-profile configuration in Cargo.toml (addressing issue #15333). 2) Authentication and registry token handling improvements: clarified errors when tokens are missing a scheme and added tests ensuring incorrect bearer tokens are rejected for alternative registries; includes improved auth hints in error messages. 3) Git dependencies with alternative registries: added support for specifying Git dependencies together with an alternative registry, with tests validating end-to-end integration. Impact: improved performance analysis capabilities, stronger security and UX in authentication, and greater flexibility in dependency sourcing, enabling more reliable CI and faster iteration for downstream projects.