Rustup 1.29.0 has been released with concurrent component downloads and unpacking during downloads, significantly improving toolchain installation performance. New host platform support has been added for sparcv9-sun-solaris and x86_64-pc-solaris, along with automatic PATH configuration for tcsh and xonsh shells. Quality-of-life improvements include fallback to PATH-based rust-analyzer binaries, treating empty environment variables as unset, and distinct exit codes for rustup check. Update via `rustup self update` or `rustup update`.
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